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WO1998043543A1 - Element de maintien de suture utilisable a des fins medicales - Google Patents

Element de maintien de suture utilisable a des fins medicales Download PDF

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Publication number
WO1998043543A1
WO1998043543A1 PCT/JP1998/001490 JP9801490W WO9843543A1 WO 1998043543 A1 WO1998043543 A1 WO 1998043543A1 JP 9801490 W JP9801490 W JP 9801490W WO 9843543 A1 WO9843543 A1 WO 9843543A1
Authority
WO
WIPO (PCT)
Prior art keywords
holding member
main body
suture
medical
polymer material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP1998/001490
Other languages
English (en)
French (fr)
Inventor
Keiji Igaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Igaki Iryo Sekkei KK
Original Assignee
Igaki Iryo Sekkei KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Igaki Iryo Sekkei KK filed Critical Igaki Iryo Sekkei KK
Priority to DK98911145T priority Critical patent/DK0922435T3/da
Priority to DE69838576T priority patent/DE69838576T2/de
Priority to EP98911145A priority patent/EP0922435B1/en
Priority to AU65214/98A priority patent/AU746934B2/en
Priority to CA002256321A priority patent/CA2256321C/en
Priority to JP54146498A priority patent/JP4122066B2/ja
Publication of WO1998043543A1 publication Critical patent/WO1998043543A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07207Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07292Reinforcements for staple line, e.g. pledgets

Definitions

  • the present invention relates to a medical suture holding member to be sewn to an excision site or the like of a living tissue, and more particularly to a medical suture holding member used by being attached to an automatic suture instrument.
  • BACKGROUND ART Surgical removal of lesions in living tissues is generally performed by surgery.However, endoscopic surgery and the like are being performed to reduce the burden on patients. ing.
  • an automatic suture device is introduced into a living body through a perforation and suturing an affected part and suturing a cut site.
  • the use of the automatic suturing device has an advantage that the incision of the affected part is unnecessary. Therefore, the automatic suturing device has a suturing mechanism at the distal end thereof for sandwiching the resected portion of the living tissue, and further includes a plurality of stable lines for suturing and a knife for cutting the living tissue. And the like.
  • the use of the automatic suturing device is advantageous for shortening the suturing and incision time and for simplifying the operation.
  • the invention is to provide a novel medical suture holding member capable of solving the problem points with the conventional suture holding member as described above c
  • Another object of the present invention is that the insertion operation into the automatic suturing device is easy, and there is no inconvenience due to displacement or rotation when inserting the automatic suturing device. It is an object of the present invention to provide a medical suture holding member capable of reliably preventing suturing.
  • Still another object of the present invention is to provide a medical suture holding member that can be easily attached to an automatic suture device and can be securely attached to the automatic suture device.
  • Still another object of the present invention is to provide a medical suturing and holding member capable of performing an insertion operation into a living body smoothly.
  • the medical suture holding member according to the present invention proposed to achieve the above-mentioned object is used by being attached to an automatic suture device having a step line, and is made of a natural or synthetic polymer material. Accordingly, a holding member main body integrally formed in a tubular shape having an opening for enabling attachment to an automatic suture instrument is provided on the base end side.
  • the suture holding member By forming the suture holding member into a tubular shape with its distal end closed, it is possible to eliminate the occurrence of displacement due to contraction in the insertion direction at the time of insertion into the automatic suture instrument.
  • the suture holding member can be reliably positioned.
  • the medical suture holding member according to the present invention is provided with a means for preventing the holding member main body from falling off in order to prevent the medical suture holding member from easily falling off when attached to the automatic suturing device.
  • a means for preventing the falling off there are other parts on the base end side where the opening of the holding member main body is formed.
  • the thick part is formed so that the elastic force is larger than the part.
  • the inner peripheral surface of the holding member main body is made to have a rough surface composed of minute irregularities in order to prevent the falling from the automatic suture instrument.
  • a plurality of ridges are provided on the inner peripheral surface of the holding member main body.
  • a display line is provided that extends in the axial direction of the main body of the holding member so that the state of attachment to the automatic suture device can be easily checked.
  • Scales are provided at regular intervals on the holding member main body so that the amount of tissue of the living body sandwiched by the automatic suturing device can be grasped.
  • the surface is treated so as to have hydrophilicity.
  • the force storage housing the stable of the automatic suturing machine and the suturing mechanism on which the knife blade is loaded, and the suturing mechanism receiving the staple together with the suturing mechanism on the side of the suturing mechanism.
  • the colors of each holding member body are different, so that the holding member body attached to the rear part of the suture device and the staple holder can be easily identified.
  • a polymer material that can be integrally molded into a cylindrical shape with a closed end can be used, but can be securely attached to the automatic suture instrument, and the attaching operation can be performed easily.
  • a polymer material having elasticity and flexibility at room temperature Specifically, natural polymer materials such as natural rubber, collagen, gelatin and chitin, chitosan, aliphatic polyesters, aliphatic anhydrides, aliphatic polycarboxylic acids, polyphosphazenes, or at least A synthetic polymer material which is a copolymer containing one of the following is used.
  • polyglycolic acid polymilk for easy post-operative treatment
  • Bioabsorbable polymers such as acids, polyprolactones, poly- / hydroxy-nolates, or copolymers containing one of them, or parts of living tissue, such as the heart It is desirable to use an organ protection film such as a sclera.
  • FIG. 1 is a perspective view showing a medical suture holding member according to the present invention.
  • FIG. 2 is a sectional view of the medical suture holding member shown in FIG.
  • FIG. 3 is a cross-sectional view showing another example of the medical suture holding member according to the present invention.
  • FIG. 4 is a cross-sectional view showing still another example of the medical suture holding member according to the present invention.
  • FIG. 5 is a sectional view showing still another example of the medical suture holding member according to the present invention.
  • FIG. 6 is a sectional view showing still another example of the medical suture holding member according to the present invention.
  • FIG. 7 is a sectional view showing still another example of the medical suture holding member according to the present invention.
  • FIG. 8 is a schematic perspective view showing an example of an automatic suturing device using the suturing holding member.
  • FIG. 9 is a schematic perspective view of a main part of a suturing mechanism of the automatic suturing device.
  • FIG. 10 is a schematic view showing a state in which the suture holding member is attached to the automatic suturing device. It is a schematic perspective view.
  • FIG. 11 is a schematic perspective view showing a suturing operation state by the automatic suturing device.
  • FIG. 12 is a schematic perspective view showing an end state of the suturing procedure.
  • FIG. 13 is a perspective view of a medical suturing and holding member according to the present invention in which a display line is provided on the holding member main body.
  • FIG. 14 is a perspective view of a medical suture holding member according to the present invention in which a scale line is provided on the holding member main body.
  • FIG. 15 is a perspective view showing still another example of the medical suture holding member according to the present invention.
  • FIG. 16 is a cross-sectional view showing still another example of the medical suture holding member according to the present invention.
  • FIG. 17 is a perspective view showing another example of the holding member main body constituting the medical suture holding member according to the present invention.
  • FIG. 18 is a perspective view of a medical suture holding member in which an insertion smooth layer is formed on the surface of the holding member main body shown in FIG.
  • FIG. 19 is a perspective view showing an example in which the holding member main body of the medical suture holding member according to the present invention is provided with an easy-to-cut line.
  • FIG. 20 is a perspective view showing another example of a medical suture holding member in which an easy-cutting line is provided on the holding member main body.
  • FIG. 21 is a perspective view showing a state where the distal end portion of the holding member main body is separated along the easy cutting line.
  • FIG. 22 is a perspective view showing still another example of the medical suture holding member in which the holding member main body is provided with an easy-to-cut line.
  • Figure 23 shows a medical suture holder with an easy-to-cut line on the holding member body. It is a side view which shows another example of a holding member.
  • BEST MODE FOR CARRYING OUT THE INVENTION hereinafter, a specific example of a medical suture holding member according to the present invention will be described with reference to the drawings.
  • the medical suture holding member 1 includes a cylindrical holding member main body 2.
  • the holding member body 2 has an opening 3 on the base end side.
  • the opening 3 is to be mounted on a suturing mechanism constituting a suturing portion of the automatic suturing device or a staple receiving table which receives a stable protruding from the suturing mechanism and bends the staple. That is, the medical suture holding member 1 is mounted on the outer peripheral side of the suturing mechanism or the staple receiving base via the opening 3.
  • the tip of the holding member body 2 is closed. That is, the suture holding member main body 2 is integrally formed in a tubular shape having a closed distal end and an opening 3 on the proximal end side.
  • the holding member main body 2 can be formed by injection-molding a polymer material using a mold device for injection molding. Alternatively, it is formed by extruding a polymer material to form a preform for a cylinder, and then blow-molding the preform.
  • the holding member main body 2 is formed with a length substantially equal to the length of a mounting portion of an automatic suturing device described later.
  • a natural or synthetic polymer material is used as a material forming the holding member body 2.
  • a material having elasticity and flexibility at room temperature of about 10 ° C. to 30 ° C. is used. Can be. This is for securely mounting the tubular holding member body 2 having a closed distal end portion on the automatic suture instrument and facilitating the mounting operation.
  • the suturing holding member body 2 is formed of a material having elasticity and flexibility at room temperature
  • the inner peripheral diameter of the suturing holding member main body 2 is formed slightly smaller than the outer diameter of the mounting portion of the automatic suturing device. Attach it to the attachment part of the automatic suture instrument using elastic force.
  • a natural polymer material such as natural rubber, collagen, gelatin, or chitin / chitosan is used.
  • the natural polymer material it is also possible to use a bioabsorbable, for example, an organ protective film such as a pericardium, a part of a living tissue such as skin or muscle.
  • a bioabsorbable for example, an organ protective film such as a pericardium, a part of a living tissue such as skin or muscle.
  • the material constituting the holding member body 2 may be aliphatic polyester, aliphatic acid anhydride, aliphatic polyether carbonate, polyphosphazene, a copolymer containing at least one of them, or a bioabsorbable material.
  • bio-absorbable synthetic polymer material such as poly-ol-prolactone
  • it may be used in combination with another polymer material containing at least 3 mol% or more of this poly-ol-prolactone.
  • Copolymers can be used.
  • poly-/-hydroxy alkanoate which is a bioabsorbable synthetic polymer material
  • the poly-/-hydroxy alkanoate contains at least 3 O mol% or more.
  • other polymer materials Can be used.
  • the suture holding member 1 may be formed by a composite of a natural polymer material and a synthetic polymer material as described above.
  • the holding member main body 2 As a material for forming the holding member main body 2, it is desirable to use a bioabsorbable material of a natural or synthetic polymer material. By using such a bioabsorbable material, a procedure such as removal of the suture holding member 1 after surgery can be eliminated.
  • the suture holding member 1 is provided with a mechanism for preventing the suture holding member 1 from dropping off from the automatic suture device when attached to the automatic suture device.
  • a thick portion 4 which is thicker than other portions is provided at the base end of the holding member body 2 where the opening 3 is formed.
  • the thick portion 4 is formed integrally with the holding member main body 2 and is formed at the same time when the holding member 2 is formed.
  • the holding member main body 2 is molded from a natural or synthetic polymer material having elasticity, a portion formed as the thick portion 4 is provided with a larger elastic force than other portions.
  • a large pressing force can be obtained at the thick portion 4. Therefore, it is possible to prevent the suture holding member 1 from being accidentally dropped from the automatic suture instrument.
  • the thick portion 4 may be such that the base end side of the holding member main body 2 is thicker than other portions, and swells on either the inner peripheral surface side or the outer peripheral surface side of the holding member main body 2. Such a configuration may be used.
  • the inner peripheral surface of the holder 2 Is formed as a rough surface. By making the inner peripheral surface of the holding member body 2 rough, the frictional force between the suture holding member 1 and the automatic suturing device when the suture holding member 1 is attached to the automatic suturing device is increased. As a result, the suture holding member 1 can be prevented from being inadvertently dropped from the automatic suturing device.
  • a plurality of ridges 6 are formed on the inner peripheral surface of the holding member main body 4 in the axial direction from the base end side where the opening 3 is provided to the distal end side.
  • a plurality of ridges 7 are formed substantially parallel to each other in the circumferential direction of the holding member wooden body 4 at regular intervals. Is also good. Even when formed in this manner, the inner peripheral surface of the holding member main body 4 has an uneven surface, so that the frictional force between the suture holding member 1 and the automatic suturing device can be increased, and the Inadvertent detachment from the automatic suture instrument can be prevented.
  • a ridge portion 8 may be formed in a mesh shape on the inner peripheral surface of the holding member main body 4. Even when formed in this manner, the inner peripheral surface of the holding member body 4 is made uneven so that the frictional force between the suture holding member 1 and the automatic suturing device can be increased, and the automatic operation of the suture holding member 1 can be achieved. Inadvertent detachment from the suture instrument can be prevented.
  • FIGS. 3 to 6 in addition to forming minute irregularities 5 or ridges 6, 7, 8 on the inner peripheral surface of the holding member main body 4, as shown in FIG.
  • the thick part 4 may be provided on the base end side of the main body 2. In this manner, by forming the thick portion 4 in the holding member main body 2, it is possible to more reliably prevent the suture holding member 1 from being accidentally dropped from the automatic suturing device.
  • the opening 3 of the holding body 2 is formed as shown in FIG.
  • Thick portions 4a and 4b are formed on the holder main body 2 in the circumferential direction on the formed base end side and the closed distal end side.
  • the suturing holding member 1 configured as described above is used by being attached to an automatic suturing device. Therefore, the structure of the automatic suturing device and the method of using the suture holding member 1 will be described below.
  • the automatic suturing device has a suturing portion 12 that can be opened and closed at the distal end of a shaft 11, and an operating portion for grasping and operating at a base end portion. 13 are provided.
  • the suturing portion 12 sandwiches a living tissue together with a suturing mechanism portion 12a to which a cartridge or a nipple blade containing a staple is loaded and a rear portion 12a of the suturing device.
  • Scan line 15 is on. 'This automatic suture device is inserted into a living body through an attachment called a surge boat. That is, first, a hole is provided in the body —Attach the robot and insert the automatic suturing device shaft 11 into the living body through this surge boat. Thereby, the hermetic seal of the perforation provided in the living body is maintained.
  • the suture holding member 1 is used by being attached to a suture portion 12 of the automatic suturing device.
  • FIG. 10 shows a state in which the suturing holding member 1 is attached to the suturing portion 12 of the automatic suturing device.
  • the suturing holding member 1 is attached to the suturing mechanism 12 a and the staple receiving portion 12 b, respectively. It is attached.
  • the attachment of the suture holding member 1 to the suture portion 12 is performed by inserting the suture holding member 1 into the suture portion 12 through the opening 2 on the base end side. At this time, as shown in FIGS.
  • the inner diameter R of the suture holding member 1 is smaller than the outer diameter R 2 of the suturing mechanism 12 a or the outer diameter R 3 of the staple receiving section 12 b.
  • the elastic force of the suturing holding member 1 can be used to securely hold the suturing mechanism unit 12a or the staple receiving unit 12b in close contact.
  • the automatic suturing device is inserted into the living body via the surge boat as described above, and reaches the affected part.
  • the suture holding member 1 attached to the automatic suturing device has a shape in which a tubular member having a closed end is pushed from the closed portion, so that a biased twist due to contraction occurs.
  • the holding member main body 2 is provided with a mechanism for preventing the holding member main body 2 from dropping off from the automatic suturing device, so that the suturing mechanism section 12a and the staple receiving section 12b are securely provided. It can be prevented from accidentally falling off. Further, when the suturing portion 12 is advanced and retracted into the living body, it is possible to prevent a displacement of the mounting position of the suturing holding member 1 with respect to the suturing mechanism portion 12a or the staple receiving portion 12b. it can.
  • the resected portion of the living tissue 20 is sandwiched between the suturing mechanism portion 12a and the stable receiving portion 12b. As a result, the resection site is covered with the suture holding member 1.
  • a staple is stapled along the resected portion of the living tissue 20 and a suturing procedure is performed.
  • the suture holding member 1 attached to the suturing portion 12 is simultaneously sewn. It is pressed against the resection site of tissue 20 and sutured by a step.
  • the suture holding member 1 functions as a reinforcing material at the time of suturing.
  • suturing a cut portion of the living tissue 20 through the suture holding member 1 the tissue is prevented from being torn, and, for example, a giant lung cyst is removed. During resection, air leakage is prevented.
  • FIG. 12 shows a state where the suturing is completed.
  • the suturing holding member 1 is sewn to the suturing portion of the living tissue 20 so that the suturing state is extremely stable.
  • the holding member main body 2 is formed of a transparent natural or synthetic polymer material. This By forming the holding member main body 2 into a transparent material as described above, when a suture site of a living tissue is sutured, the suture site can be visually confirmed via the suture holding member 1.
  • a linear display line 31 is provided continuously and continuously from the base end side to the distal end side.
  • the display line 31 is provided by printing or by forming a ridge on the outer peripheral surface of the holding body 2.
  • scales 32 are provided on the outer peripheral surface of the holding member main body 2 at regular intervals as shown in FIG. By providing the scale 32 in this manner, the amount of tissue of the living body sandwiched between the suture portions 12 of the automatic suture instrument can be easily grasped, and the amount of suture can be confirmed.
  • the holding member main body 2 gradually moves from the proximal end 33a where the opening 3 is formed to the closed distal end 33b as shown in FIG. It is desirable that the taper be formed so as to reduce the diameter. In this case as well, as described above, by providing the retaining member main body 2 with a structure for preventing falling off, a more secure mounting state to the suturing mechanism section 12a or the stable receiving section 12b is assured. However, easy falling off is prevented.
  • the suture holding member 1 includes, as shown in FIG.
  • An insertion smooth layer 41 is provided on the surface of the holding member body 2 which is integrally formed in a cylindrical shape with a natural or synthetic polymer material and is coated with a hydrophilic polymer by coating or the like.
  • hydrophilic polymer constituting the insertion smoothing layer 41 for example, methyl methyl acrylate, hydroxyxethyl methacrylate, or the like is used. More specifically, Pacuflexx (trade name) and Hydroplus Coating (trade name) manufactured by Boston's Scientific Co., Ltd. are used.
  • the insertion smooth layer 41 made of a hydrophilic polymer on the surface of the holding member main body 2, it is possible to perform a smooth insertion into a living body. That is, when the suture holding member 1 is inserted into the living body, the lubricating property is improved by the insertion smooth layer 41 being combined with the body fluid, and smooth insertion into the living body is realized.
  • the holding member main body 2 may be integrally formed into a cylindrical shape using a natural or synthetic polymer material and subjected to a surface treatment so that the surface of the holding member main body 2 becomes hydrophilic. In order to make the surface of the holding body 2 hydrophilic, the holding member body 2 is immersed in an aqueous solution.
  • the suturing holding member 1 is used by being simultaneously attached to the suturing mechanism 12a and the stable receiving portion 12b constituting the suturing portion 12 of the automatic suturing device. That is, the suture holding member 1 includes a pair of holding portion main bodies 2. -Therefore, the colors of the pair of holding member bodies 2 and 2 are made different to facilitate confirmation of attachment to the suturing mechanism section 12a and the stable receiving section 12b. In this way, the colors of the pair of holding member bodies 2 and 2 are changed. By using different colors, the suturing mechanism section 12a and the staple receiving section 12b can be distinguished by the color, and the insertion operation of the suturing section 12 into the living body can be performed reliably. it can.
  • a holding member main body 102 made of a knitted material obtained by knitting a yarn made of a natural or synthetic polymer material into a tubular shape.
  • Prepare The yarn used at this time is formed by spinning a fiber made of a natural or synthetic polymer material.
  • the knitted fabric constituting the holding member main body 102 is formed by sequentially knitting one thread into a loop.
  • the holding member main body 102 may be formed of a woven fabric woven in a mesh shape.
  • the woven fabric used here is woven from natural or synthetic polymer material as weft and warp.
  • the yarn is made into a circular knit and a tubular fabric.
  • the surface of the holding member main body 102 formed of a knitted or woven fabric is smoothly inserted into the surface of the holding member main body 102 made of a natural or synthetic polymer material.
  • a layer 104 is provided to smooth the surface of the holding member body 102.
  • the suture holding member 1 since the holding member main body 2 is formed in a tubular shape, the suture holding member 1 is attached to an automatic suturing device to cut a resected part of a living body.
  • the staple on one side covers the suturing mechanism 12a of the automatic suturing machine and the peripheral surface of the staple receiver 12b and binds with the other staple.
  • the part that was specified is in a continuous state. In order to remove the resection site from the living body, it is necessary to cut a continuous portion of the holding member body 2.
  • the first easy cutting lines 31 are provided in a pair in the longitudinal direction of the holding member main body 2 so as to face each other from the base end side to the distal end side.
  • the second easy-to-cut line 32 is provided on the distal end side of the holding member body 2 and in the circumferential direction of the holding member body 2.
  • the first easy cutting line 32 is provided at a position corresponding to a length L corresponding to a step line of the automatic suturing device from the base end of the holding member main body 2.
  • the resected portion of the living body is sutured and cut, and then the holding member main body 2 is withdrawn, so that the holding member main body 2 is continuously connected.
  • the part can be separated along the first and second easy cutting lines 31 and 32, and the resection site can be easily removed from the living body. That is, the holding member main body 2 is cut along the first easy separation line 31, so that the portions sewn with the stable are separated and the second easy separation line 32 is formed.
  • the distal end portion 2 a closed by being cut along is separated from the holding member main body 2.
  • the first and second easy cutting lines 31 and 32 are perforated and circular Or by continuously forming rectangular small holes.
  • the second easy-to-separate line 32 is not provided on the entire periphery of the holding member main body 2 and is held between the pair of first easy-to-cut lines 31 and 31 as shown in FIG. It may be provided over a half circumference of the member main body 2.
  • the second easy separation line 32 is provided over a half circumference of the holding member main body 2 between the pair of first easy cutting lines 31 and 31, a part of the distal end 2 a is required. Since it is possible to keep the holding member main body 2 continuous, it may be formed as a cutting line as shown in FIG. In this case, as shown in FIG. 23, a protruding piece 33 protruding toward the holding member main body 2 is provided in a part of the cut portion. By providing the protruding piece 33 in this manner, the holding member main body 2 can be easily separated along the first cutout easy line 31 by grasping the protruding piece 33.
  • the suturing and holding member according to the present invention is provided with a means for preventing the suturing member from falling off, so that the suturing and holding member must be securely attached to the automatic suturing device.
  • the holding member main body into a tubular shape having a closed end, it is possible to eliminate the occurrence of displacement in the insertion direction (shrinkage) when inserting the holding member into the automatic suture device.
  • the medical suturing member integrally molded into a When attached to the suturing device, the entire periphery of the attachment portion is covered by the suturing holding member, so that the suturing holding member can be reliably positioned at the suturing position of the living body.
  • the medical suture holding member according to the present invention has been subjected to a treatment so as to have a hydrophilic surface, the operation of inserting the member into a living body can be performed extremely smoothly.
  • a continuous portion of the holding member main body can be easily cut after suturing and cutting an excision site of a living body, and the excision site can be easily removed. be able to.

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  • Health & Medical Sciences (AREA)
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  • Surgery (AREA)
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  • Heart & Thoracic Surgery (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
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  • Materials For Medical Uses (AREA)
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  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Sewing Machines And Sewing (AREA)

Description

明細書 医療用縫合保持部材 技術分野 本発明は、 生体組織の切除部位等に縫い合わされる医療用縫合保 持部材に関し、 特に自動縫合器に装着して使用される医療用縫合保 持部材に関する。 背景技術 生体組織に生じた病巣の切除は、 外科的手術によるのが一般的で あるが、 患者に対する負担の軽減などを目的に、 内視鏡下での手術 等が施術されるようになってきている。
例えば、 自動縫合器を用いた切除術等は、 その一例である。 自動 縫合器は、 穿孔から生体内へ導入され、 患部を切除すると同時に切 除部位の縫合を行うものであり、 これを用いることで患部の切開が 不用となるという利点がある。 したがって、 自動縫合器は、 先端に 生体組織の切除部位を挟み込む縫合機構部を有し、 さらにこの縫合 機構部には、 縫合のための複数のステーブルラインゃ生体組織を切 断するためのナイフ等の切断機構が設けられている。
もちろん、 外科的手術においても、 前記自動縫合器の使用は、 縫 合、 切開時間の短縮や、 施術の簡便化に有利である。
ところで、 肺、 気管支、 肝臓、 消化管等の脆弱な組織に対して前 述の自動縫合器で施術する場合、 ステーブルによる縫合のみでは、 組織の断裂のおそれがあり、 また、 例えば肺の手術においては、 空 気漏れが発生する虞がある。 前記空気漏れは、 患者にとって致命的 であり、 これを確実に防止することが望まれる。
そこで、 自動縫合器に縫合保持部材を装着しておき、 これを生体 組織の切除部位にステ一プルで縫い合わせるということが行われて いる。
この場合、 縫合保持部材を自動縫合器に装着可能とし、 確実に患 部に到達させるためには、 何らかの工夫が必要であり、 例えば、 フ エルト状の縫合保持部材に伸縮性を有するニッ ト地を重ね、 これら を仮縫い糸で両側縁に沿って縫い付け、 筒状にしたものが提案され ている。
しかしながら、 伸縮性を有するニッ ト地を縫合用の糸により縫い 付けて自動縫合器への装着を可能とした縫合保持部材では、 自動縫 合器を生体内に挿入して患部へ導入する際に、 挿入方向で収縮し自 動縫合器の基端側に片寄ったり、 自動縫合器の周囲で回転する、 す なわちッイス トする等の不都合が発生している。
縫合保持部材に片寄りや回転が生ずると、 的確な処置が難しく、 特に内視鏡下のような限られた視野での施術の際に、 大きな問題と なる。 発明の開示 本発明の目的は、 上述したような従来の縫合保持部材が有する問 題点を解決し得る新規な医療用縫合保持部材を提供することにある c 本発明の他の目的は、 自動縫合器への挿入操作が容易で、 自動縫 合器の挿入時に片寄りや回転による不都合が発生することがなく、 例えば肺の手術に用いた場合に空気漏れを確実に防止することを可 能となす医療用縫合保持部材を提供することを目的とする。
本発明のさらに他の目的は、 自動縫合器への装着操作が容易で、 確実に自動縫合器に装着することを可能となす医療用縫合保持部材 を提供することを目的とする。
本発明のさらに他の目的は、 生体内への挿入操作を円滑に行うこ とを可能となす医療用縫合保持部材を提供することを目的とする。 上述したような目的を達成するために提案される本発明に係る医 療用縫合保持部材は、 ステ一プルラインを有する自動縫合器に装着 して用いられるものであり、 天然若しくは合成の高分子材料により、 基端部側に自動縫合器への装着を可能となす開口部を有する筒状に 一体に成形された保持部材本体を備えるものである。
この縫合保持部材は、 先端を閉塞した筒状に成形することにより、 自動縫合器への挿入の際に挿入方向に収縮することによる片寄りの 発生をなくすことができる。
さらに、 先端が閉塞された筒状に一体に成形された医療用縫合部 材は、 自動縫合器に装着したとき、 装着部の全周が縫合保持部材に より覆われるので、 生体の縫合位置に確実に縫合保持部材を位置さ せることができる。
本発明に係る医療用縫合保持部材は、 自動縫合器に装着した際、 容易に脱落してしまうことを防止するため、 保持部材本体に脱落防 止を図るための手段を設けたものである。 この脱落を防止するため の手段として、 保持部材本体の開口部が形成された基端部側に、 他 の部分より弾性力を大きくするように肉厚部を形成する。 また、 自 動縫合器からの脱落を防止するため、 保持部材本体の内周面を微小 な凹凸からなる粗面とする。 あるいは、 保持部材本体の内周面に複 数の突条部を設ける。
自動縫合器への装着状態を容易に確認し得るように、 保持部材本 体の軸方向に連なる表示線を設ける。
自動縫合器によつて挟んだ生体の組織量を把握し得るように、 保 持部材本体に一定間隔で目盛りが設けられている。
生体内への装着操作を容易となすため、 表面を親水性を有するよ うな処理が施される。
自動縫合器のステーブルが収容された力一トリ ッジゃナイフブレ ―ドが装填される縫合機構部側とこの縫合機構部とともに生体組織 を挟持しステ一プルを受けるステ一プル受け台にそれぞれ装着され るように一対の保持部材本体から構成されるとき、 それぞれの保持 部材本体の色彩を異にすることによって、 縫合器後部及びステープ ル受け台に装着される保持部材本体の識別を容易となす。
そして、 医療用縫合保持部材を構成する材料として、 先端部を閉 塞した筒状に一体に成形し得る高分子材料を用いることができるが、 自動縫合器に確実に装着でき、 且つ装着操作を容易とするため、 常 温で伸縮性及び柔軟性を有する高分子材料を用いることが望ましい。 具体的には、 天然ゴム、 コラーゲン、 ゼラチンゃキチン . キトサ ンの如き天然の高分子材料や、 脂肪族ポリエステル、 脂肪族酸無水 物、 脂肪族ポリ力一ボネイ ト、 ポリホスファゼン、 又は少なく とも それらの 1つを含む共重合体である合成高分子材料が用いられる。 特に、 術後の処理を容易とするため、 ポリグリコール酸、 ポリ乳 酸、 ポリ一 £一力プロラク トン、 ポリ一/?—ヒ ドロキシアル力ノエ ート、 又はそれらの 1つを含む共重合体の如き生体吸収性高分子や, 生体組織の一部、 例えば心のう膜等の臓器保護膜を用いることが望 ましい。
さらに、 本発明は、 保持部材本体に切り取り容易線を設けること により、 保持部材本体の分離を容易に行うことができる。 図面の簡単な説明 図 1は、 本発明に係る医療用縫合保持部材を示す斜視図である。 図 2は、 図 1に示す医療用縫合保持部材の断面図である。
図 3は、 本発明に係る医療用縫合保持部材の他の例を示す断面図 である。
図 4は、 本発明に係る医療用縫合保持部材のさらに他の例を示す 断面図である。
図 5は、 本発明に係る医療用縫合保持部材のさらに他の例を示す 断面図である。
図 6は、 本発明に係る医療用縫合保持部材のさらに他の例を示す 断面図である。
図 7は、 本発明に係る医療用縫合保持部材のさらに他の例を示す 断面図である。
図 8は、 上記縫合保持部材が用いられる自動縫合器の一例を示す 概略斜視図である。
図 9は、 上記自動縫合器の縫合機構部の要部概略斜視図である。 図 1 0は、 縫合保持部材の上記自動縫合器への装着状態を示す概 略斜視図である。
図 1 1は、 上記自動縫合器による縫合操作状態を示す概略斜視図 である。
図 1 2は、 縫合処置の終了状態を示す概略斜視図である。
図 1 3は、 保持部材本体に表示線を設けた本発明に係る医療用縫 合保持部材の斜視図である。
図 1 4は、 保持部材本体に目盛り線を設けた本発明に係る医療用 縫合保持部材の斜視図である。
図 1 5は、 本発明に係る医療用縫合保持部材のさらに他の例を示 す斜視図である。
図 1 6は、 本発明に係る医療用縫合保持部材のさらに他の例を示 す断面図である。
図 1 7は、 本発明に係る医療用縫合保持部材を構成する保持部材 本体の他の例を示す斜視図である。
図 1 8は、 図 1 6に示す保持部材本体の表面に挿入円滑層を形成 した医療用縫合保持部材の斜視図である。
図 1 9は、 本発明に係る医療用縫合保持部材の保持部材本体に切 り取り容易線を設けた例を示す斜視図である。
図 2 0は、 保持部材本体に切り取り容易線を設けた医療用縫合保 持部材の他の例を示す斜視図である。
図 2 1は、 切り取り容易線に沿って保持部材本体の先端部を分離 した状態を示す斜視図である。
図 2 2は、 保持部材本体に切り取り容易線を設けた医療用縫合保 持部材のさらに他の例を示す斜視図である。
図 2 3は、 保持部材本体に切り取り容易線を設けた医療用縫合保 持部材のさらに他の例を示す側面図である。 発明を実施するための最良の形態 以下、 本発明に係る医療用縫合保持部材の具体的な例を、 図面を 参照して説明する。
本発明に係る医療用縫合保持部材 1は、 図 1に示すように、 筒状 に成形された保持部材本体 2を備えている。 この保持部材本体 2は、 基端部側に開口部 3が設けられている。 この開口部 3は、 自動縫合 器の縫合部を構成する縫合機構部又はこの縫合機構部から突出され るステーブルを受けこのステ一プルを折り曲げるステープル受け台 への装着用となる。 すなわち、 医療用縫合保持部材 1は、 開口部 3 を介して縫合機構部又はステ一プル受け台の外周側に装着される。 また、 保持部材本体 2の先端は、 閉塞されている。 すなわち、 縫 合保持部材本体 2は、 先端部を閉塞し、 基端部側に開口部 3を有す る筒状に一体に成形されている。
この保持部材本体 2は、 射出成型用の金型装置を用い、 高分子材 料を射出成形することによって成形することができる。 あるいは、 高分子材料を押し出し成形して筒用の予備成形品を成形し、 この予 備成形品をブロー成形することによって成形される。
そして、 保持部材本体 2は、 後述の自動縫合器の装着部の長さと ほぼ等しい長さをもって形成される。 - ここで、 保持部材本体 2を構成する材料として、 天然若しくは合 成の高分子材料が用いられる。 そして、 用いる高分子材料としては、 約 1 0 ° C〜 3 0 ° Cの常温で伸縮性及び柔軟性を有する材料が用 いられる。 これは、 先端部を閉塞した筒状に成形された保持部材本 体 2を、 自動縫合器に確実に装着し、 且つ装着操作を容易とするた めである。 縫合保持部材本体 2を常温で伸縮性及び柔軟性を有する 材料により成形する場合には、 その内周径は、 自動縫合器の装着部 の外周径ょりやや小さく成形し、 保持部材本体 2の弾性力を利用し て自動縫合器の装着部に装着するようになす。
そして、 保持部材本体 2を構成する材料として、 天然ゴム、 コラ 一ゲン、 ゼラチン、 又はキチン ·キトサンの如き天然高分子材料が 用いられる。
さらには、 天然高分子材料としては、 生体吸収性を有する、 例え ば、 心のう膜、 等の臓器保護膜、 皮膚や筋肉のような生体組織の一 部を使用することも可能である。
さらに、 保持部材本体 2を構成する材料として、 脂肪族ポリエス テル、 脂肪族酸無水物、 脂肪族ポリ力一ボネィ 卜、 ポリホスファゼ ン、 又は少なく ともそれらの 1つを含む共重合体や、 生体吸収性を 有する高分子材料であるポリグリコ一ル酸、 ポリ乳酸、 ポリ一 £一 力プロラク トン、 ポリ一/?—ヒ ドロキシアル力ノエ一ト、 又はそれ らの 1つを含む共重合体を使用することができる。
さらに、 生体吸収性の合成高分子材料であるポリ一 £一力プロラ ク トンを用いる場合には、 このポリ一 £一力プロラク トンを少なく とも 3 O mol %以上含む他の高分子材料との共重合体を用いることが できる。
さらにまた、 生体吸収性の合成高分子材料であるポリ一/?—ヒ ド ' ロキシアルカノエートを用いる場合には、 このポリ一/?—ヒ ドロキ シアルカノェ一トを少なく とも 3 O mol %以上含む他の高分子材料と の共重合体を用いることができる。
さらにまた、 縫合保持部材 1は、 上述したような天然高分子材料 と合成高分子材料の複合体により成形したものであってもよい。
この保持部材本体 2を構成する材料としては、 天然若しくは合成 高分子材料において、 生体吸収性を有する材料を用いることが望ま しい。 このような生体吸収性材料を用いることにより、 術後に縫合 保持部材 1の取り出し等の処置をなくすことができるためである。
ところで、 本発明に係る縫合保持部材 1には、 自動縫合器に装着 したときに、 自動縫合器からの脱落を防止するための機構が設けら れている。
すなわち、 保持部材本体 2の開口部 3が形成された基端部に、 図 2に示すように、 他の部分より肉厚となされた肉厚部 4を設ける。 この肉厚部 4は、 保持部材本体 2と一体に形成されてなるものであ つて、 保持部材 2を成形する際に同時に成形される。
そして、 保持部材本体 2を弾性を有する天然又は合成高分子材料 により成形したとき、 肉厚部 4となされた部分は、 他の部分より大 きな弾性力が付与される。 自動縫合器に縫合保持部材 1を装着した とき、 肉厚部 4の部分で大きな圧着力を得ることができる。 したが つて、 縫合保持部材 1の自動縫合器からの不用意な脱落を防止する ことができる。
なお、 肉厚部 4は、 保持部材本体 2の基端部側を他の部分より肉 厚するものであればよく、 保持部材本体 2の内周面側又は外周面側 のいずれに膨出するようにしたものであってもよい。 ' 縫合保持部材 1の自動縫合器からの不用意な脱落を防止するため には、 図 3に示すように、 保持部材本体 2の内周面に微小な凹凸 5 を形成した粗面となす。 このように、 保持部材本体 2の内周面を粗 面とすることにより、 縫合保持部材 1を自動縫合器に装着したとき に、 縫合保持部材 1 と自動縫合器との間の摩擦力を大きくすること ができ、 縫合保持部材 1の自動縫合器からの不用意な脱落を防止す ることができる。
また、 保持部材本体 4の内周面に、 図 4示すように、 開口部 3が 設けられた基端部側から先端側に亘る軸方向に複数の突条部 6を略 平行に形成する。 このように、 突条部 6を設けることにより、 保持 部材本体 4の内周面が凹凸面となされ、 縫合保持部材 1 と自動縫合 器との間の摩擦力を大きくすることができ、 縫合保持部材 1の自動 縫合器からの不用意な脱落を防止することができる。
さらにまた、 保持部材本体 4の内周面に、 図 5示すように、 保持 部材木体 4の周回り方向に複数の突条部 7を一定の間隔を隔て略平 行に形成するようにしてもよい。 このように形成した場合でも、 保 持部材本体 4の内周面が凹凸面となされ、 縫合保持部材 1 と自動縫 合器との間の摩擦力を大きくすることができ、 縫合保持部材 1の自 動縫合器からの不用意な脱落を防止することができる。
さらに、 保持部材本体 4の内周面に、 図 6に示すように、 網の目 状に突条部 8を形成するようにしてもよい。 このように形成した場 合でも、 保持部材本体 4の内周面が凹凸面となされ、 縫合保持部材 1 と自動縫合器との間の摩擦力を大きくすることができ、 縫合保持 部材 1の自動縫合器からの不用意な脱落を防止することができ-る。 図 3〜図 6に示すように、 保持部材本体 4の内周面に微小な凹凸' 5又は突条部 6 , 7 , 8を形成することに加えて、 図 2に示すよう に、 保持部材本体 2の基端部側に肉厚部 4を設けるようにしてよい。 このように、 さらに保持部材本体 2に肉厚部 4を形成することによ り、 一層確実に縫合保持部材 1の自動縫合器からの不用意な脱落を 防止することができる。
さらに、 図 4に示すように、 保持体本体 2に内周面に複数の突状 部 6を略平行に設けたものにおいて、 図 7に示すように、 保持体本 体 2の開口部 3が形成された基端部側及び閉塞された先端側に保持 体本体 2に周回り方向に肉厚部 4 a , 4 bを形成する。 このように 保持体本体 2斤端部側及び先端側の 2箇所に肉厚部 4 a , 4 bを設 けることにより、 この縫合保持部材 1を自動縫合器に装着したとき、 複数の突状部 6に捻れ等を生じさせることなく互いに平行な状態を 維持して自動縫合器に装着することができる。
上述のように構成された縫合保持部材 1は、 自動縫合器に装着し て使用される。 そこで次に、 自動縫合器の構造、 並びにこの縫合保 持部材 1の使用方法について説明する。
自動縫合器は、 図 8に示すように、 シャフ ト 1 1の先端に開閉自 在な縫合部 1 2を有してなるものであって、 基端部には把持 ·操作 するための操作部 1 3が設けられている。
前記縫合部 1 2は、 図 9に示すように、 ステ一プルが収容された カート リ ッジやナイプブレードが装填される縫合機構部 1 2 aとこ の縫合器後部 1 2 aとともに生体組織を挟み込むためのステ一プル 受け部 1 2 bとからなり、 縫合機構部 1 2 aの挟み込み面には、 複 数 (本例では、 3列 X 3列 = 6列) のステ一プルライン 1 4やナイ フの走査ライン 1 5が臨んでいる。 ' この自動縫合器は、 サージボートと称されるアタッチメントを介 して生体内に挿入される。 すなわち、 まず、 生体に設けた穿孔にサ —ジボ一トを装着し、 このサージボートを通して自動縫合器のシャ フ ト 1 1を生体内へと挿入する。 これによつて、 生体に設けた穿孔 の密閉が保たれる。
本発明に係る縫合保持部材 1は、 前記自動縫合器の縫合部 1 2に 装着して使用される。 図 1 0は、 縫合保持部材 1を自動縫合器の縫 合部 1 2に装着した状態を示すもので、 縫合機構部 1 2 a及びステ —プル受け部 1 2 bにそれぞれ縫合保持部材 1が取り付けられる。 縫合保持部材 1を縫合部 1 2に装着するには、 基端部側の開口部 2を介して、 縫合保持部材 1を縫合部 1 2に挿入していくことによ つて行われる。 このとき、 縫合保持部材 1の内径 R ,を、 図 1及び図 9に示すように、 縫合機構部 1 2 aの外周径 R 2又はステ一プル受け 部 1 2 bの外周径 R 3より小さく しておく ことにより、 縫合保持部材 1の弾性力を利用して縫合機構部 1 2 a又はステ一プル受け部 1 2 bに密着させて確実に保持させておく ことができる。
この状態で、 先に述べたようにサージボートを介して自動縫合器 を生体内へと挿入し、 患部へと到達させる。 このとき、 自動縫合器 に装着される縫合保持部材 1は、 先端を閉塞させた筒状のものを閉 塞された部分より押し込む形になっているので、 収縮による片寄り ゃッイス トが発生することはない。
さらに、 保持部材本体 2には、 上述したように、 自動縫合器から の脱落を防止するための機構が設けられているので、 縫合機構部 1 2 a及びステ一プル受け部 1 2 bに確実に装着され、 不用意-な脱落 を確実に防止することができる。 また、 生体内に縫合部 1 2を挿入 に進退させた場合に、 縫合保持部材 1の縫合機構部 1 2 a又はステ —プル受け部 1 2 bに対する装着位置の位置ずれを防止することが できる。
縫合部 1 2を患部へ導入した後、 図 1 1に示すように、 生体組織 2 0の切除部位を縫合機構部 1 2 a及びステーブル受け部 1 2 bに よって挟み込む。 これによつて、 切除部位は縫合保持部材 1で覆わ れることになる。
次に、 自動縫合器の操作部 1 3に設けられた操作レバ一 1 3 aを 操作し、 ステ一プルライン 1 3からステ一プルを打針する。
これによつて、 生体組織 2 0の切除部位に沿ってステ一プルが打 針され、 縫合処置が施されるが、 このとき、 同時に縫合部 1 2に装 着された縫合保持部材 1が生体組織 2 0の切除部位に押し当てられ、 ステ一プルによって縫合される。
この縫合保持部材 1は、 縫合の際の補強材として機能し、 生体組 織 2 0の切断部分を縫合保持部材 1を介して縫合することで、 組織 の断裂が防止され、 例えば巨大肺のう胞の切除術等においては、 空 気漏れが防止される。
次いで、 縫合機構部 1 2 aに設けられたナイフを走査ライン 1 5 に沿って走査し、 生体組織 2 0及び縫合保持部材 1を切断する。 以上によって縫合処置が完了するが、 本発明に係る縫合保持部材 1を用いることによって、 縫合操作を円滑に進めることができ、 し かも確実に縫合部位の補強、 空気漏れの防止を行うことができる。 図 1 2は、 縫合終了状態を示すものであり、 生体組織 2 0の縫合部 位には、 縫合保持部材 1が縫い合わされ、 縫合状態が極めて安定な ものとなっている。 ' また、 本発明に係る縫合保持部材 1は、 保持部材本体 2を透明な 天然若しくは合成高分子材料により成形することが望ましい。 この ように、 保持部材本体 2を透明な材料に成形することにより、 生体 組織の縫合部位を縫合したとき、 縫合保持部材 1を介して縫合部位 を目視により確認することができる。
さらに、 保持部材本体 2の外周面に、 図 1 3に示すように、 基端 部側から先端部側に亘つて一連に連続するに直線の表示線 3 1を設 ける。 この表示線 3 1は、 印刷により又は保持体本体 2の外周面に 突条部を形成することによって設けられる。 このように、 表示線 3 1を設けることにより、 縫合保持部材 1を自動縫合器に装着したと き、 捻れることなく装着されたか否かの識別を容易に行うことがで きる。
さらにまた、 保持部材本体 2の外周面に、 図 1 4に示すように、 一定の間隔で目盛り 3 2を設ける。 このように目盛り 3 2を設ける ことにより、 自動縫合器の縫合部 1 2によって挟んだ生体の組織量 を容易に把握することができ、 縫合量の確認を行うことが可能とな る。
縫合保持部材 1の縫合器の縫合機構部 1 2 a又はステ一プル受け 部 1 2 bへの装着を容易となし、 さらに縫合機構部 1 2 a又はステ 一プル受け部 1 2 bへの確実な装着状態を得るため、 保持部材本体 2は、 図 1 5に示すように、 開口部 3が形成された基端部側 3 3 a から閉塞された先端部 3 3 b側に向かって徐々に縮径するテーパ状 に形成されたことが望ましい。 この場合にも、 前述したように保持 部材本体 2に脱落防止用の構成を設けることにより、 一層確実な縫 合機構部 1 2 a又はステーブル受け部 1 2 bへの装着状態が保証さ れ、 容易な脱落が防止される。
さらに、 本発明に係る縫合保持部材 1は、 図 1 6に示すように、 天然若しくは合成高分子材料により筒状に一体に成形され保持部材 本体 2の表面に親水性ポリマーを塗布等によって被着した挿入円滑 層 4 1が設けられている。
この挿入円滑層 4 1を構成する親水性ポリマ一としては、 ポリメ 夕クリル酸メチル、 ポリメ夕ク リル酸ヒ ドロキシェチル等が用いら れる。 さらに具体的には、 ボス トン ' サイエンティ フィ ック社製の パ一キュフレクッス (商品名) 、 ハイ ドロプラスコーティング (商 品名) が用いられる。
このように、 保持部材本体 2の表面に親水性ポリマ一からなる揷 入円滑層 4 1を設けることにより、 生体内への円滑な挿入を行うこ とが可能となる。 すなわち、 縫合保持部材 1が生体内に挿入される とき、 挿入円滑層 4 1が体液と結合することにより潤滑性が高めら れ、 生体内への円滑な挿入が実現される。
また、 天然若しくは合成高分子材料により、 筒状に一体に成形さ れ保持部材本体 2の表面を親水性になるような表面処理を施したも のであってもよい。 この保持体本体 2の表面を親水性にするために は、 保持部材本体 2をアル力リ水溶液に浸漬することによって行わ れる。
ところで、 本発明に係る縫合保持部材 1は、 自動縫合器の縫合部 1 2を構成する縫合機構部 1 2 a及びステーブル受け部 1 2 bに同 時に装着されて用いられる。 すなわち、 縫合保持部材 1は、 一対の 保持部本体 2をもって構成される。 - そこで、 縫合機構部 1 2 a及びステーブル受け部 1 2 bへの装着 の確認を容易となすため、 一対の保持部材本体 2 , 2の色彩を異に するようになす。 このように対をなす保持部材本体 2 , 2の色彩を 異にすることにより、 色彩により縫合機構部 1 2 a及びステ一プル 受け部 1 2 bの判別が可能となり、 縫合部 1 2の生体への挿入操作 を確実に行うことを可能とすることができる。
また、 本発明に係る縫合保持部材 1 0 1を構成するため、 図 1 7 に示すように、 天然若しくは合成高分子材料からなる糸を筒状に編 んだ編み物からなる保持部材本体 1 0 2を用意する。 このときに用 いられる糸は、 天然若しくは合成高分子材料からなる繊維を紡ぐこ とによって形成される。 また、 保持部材本体 1 0 2を構成する編み 物は、 1本の糸を順次ループ状に編み込んで形成される。
あるいは、 保持部材本体 1 0 2は、 メッシュ状に織られた織物に よって形成されたものであってもよい。 ここに用いられる織物は、 天然若しくは合成高分子材料からなる糸を緯糸及び経糸とし織り込 んだものである。 特に、 糸を円編みとし、 筒状の織物とする。
このように、 編み物又は織物で形成された保持部材本体 1 0 2の 表面に、 図 1 8に示すように、 保持部材本体 1 0 2の表面に天然若 しくは合成高分子材料からなる挿入円滑層 1 0 4を設け、 保持部材 本体 1 0 2の表面を平滑化する。 このように保持部材本体 1 0 2の 表面を平滑化することにより、 縫合保持部材 1 0 1を生体に円滑に 挿入することができる。
このとき、 挿入円滑層 1 0 4を構成する材料としては、 上述した ような親水性ポリマ一を用いることが望ましい。 あるいは、 天然若 しくは合成高分子材料からなる挿入円滑層 1 0 4の表面を親水性の 処理をすることが望ましい。 ' ところで、 本発明に係る縫合保持部材 1は、 保持部材本体 2が筒 状に形成されているので、 自動縫合器に装着して生体の切除部位を 縫合した後切断したとき、 一方の側のステープルで綴じられた部分 から自動縫合器の縫合機構部 1 2 a及びステ一プル受け部 1 2 bの 周面を覆って他方のステ一プルで綴じられた部分が連続した状態に ある。 切除部位を生体から取り出すためには、 保持部材本体 2の連 続した部分を切断する必要がある。
そこで、 生体の切除部位を縫合し切断した後、 保持部材本体 2の 連続した部分の切断を容易に行うようにするため、 図 1 9に示すよ うに、 保持部本体 2の周面に第 1及び第 2の切り取り容易線 3 1, 3 2を設ける。 第 1の切り取り容易線 3 1は、 図 1 9に示すように、 保持部材本体 2の長手方向に亘つて基端側から先端側に亘つて相対 向して一対設けられる。 第 2の切り取り容易線 3 2は、 保持部材本 体 2の先端側に位置して保持部材本体 2の周回り方向に設けられる。 第 1の切り取り容易線 3 2は、 保持部材本体 2の基端部から自動縫 合器のステ一プルラインに相当する長さ L ,に相当する位置に設けら れる。
このように第 1及び第 2の切り取り容易線 3 1 , 3 2を設けるこ とにより、 生体の切除部位を縫合し切断した後、 保持部材本体 2を 引き取ることにより、 保持部材本体 2の連続した部分を第 1及び第 2の切り取り容易線 3 1, 3 2に沿って分離することができ、 切除 部位の生体からの取り出しを容易に行うことができ。 すなわち、 保 持部材本体 2は、 第 1の分離容易線 3 1に沿って切断されることに より、 ステーブルで縫合された部分間の分離が行われ、 第 2の分離 容易線 3 2に沿って切断されることにより閉塞された先端部 2 aが 保持部材本体 2から分離される。
第 1及び第 2の切り取り容易線 3 1 , 3 2は、 ミシン目や円形若 しくは長方形状の小孔を連続して形成することによって構成される。 なお、 第 2の分離容易線 3 2は、 保持部材本体 2の全周に設ける ことなく、 図 2 0に示すように、 一対の第 1の切り取り容易線 3 1, 3 1間に亘つて保持部材本体 2の半周に亘つて設けるようにしても よい。 第 2の切り取り容易線 3 2を一対の第 1の切り取り容易線 3 1, 3 1間に亘る部分にのみ形成することにより、 図 2 1に示すよ うに、 先端部 2 aを保持部材本体 2に連続させておく ことができ、 切断後の取り扱いが容易となる。
さらに、 対の第 1の切り取り容易線 3 1 , 3 1間に亘つて保持 部材本体 2の半周に亘つて第 2の分離容易線 3 2を設ける場合には、 先端部 2 aの一部を保持部材本体 2に連続させておくことができる ので、 図 2 2に示すように、 切断線として形成するようにしてもよ い。 この場合、 切断された部分の一部に、 図 2 3に示すように、 保 持部材本体 2側に突出する突片 3 3を設ける。 このように突片 3 3 を設けることにより、 突片 3 3を把持して容易に第 1の切り取り容 易線 3 1に沿って保持部材本体 2の分離を容易に行うことができる。 産業上の利用可能性 上述したように、 本発明に係る縫合保持部材は、 保持部材本体に脱 落防止を図るための手段を設けてなるので、 自動縫合器に確実に装 着させておく ことができる。 特に、 保持部材本体を先端を閉塞した 筒状に成形することにより、 自動縫合器への挿入の際に挿入方向 (こ 収縮することによる片寄りの発生をなくすことができる。 さらに、 先端が閉塞された筒状に一体に成形された医療用縫合部材は、 自動 縫合器に装着したとき、 装着部の全周が縫合保持部材により覆われ るので、 生体の縫合位置に確実に縫合保持部材を位置させることが できる。
また、 本発明に係る医療用縫合保持部材は、 表面を親水性を有す るような処理が施されているので、 生体への挿入操作を極めて円滑 に行うことができる。
さらに、 保持部材本体に分離容易線を設けることにより、 生体の 切除部位を縫合し切断した後、 保持部材本体の連続した部分の切断 を容易に行うことができ、 切除部位の除去を容易に行うことができ る。

Claims

請求の範囲
1 . ステーブルラインを有する自動縫合器に装着して用いられる医 療用縫合保持部材において、
天然若しくは合成高分子材料により、 筒状に一体に成形され、 基 端部側に上記自動縫合器の縫合部への装着を可能となす開口部が形 成された保持部材本体を備えることを特徴とする医療用縫合保持部 材。
2 . 上記保持部材本体は、 先端部が閉塞された筒状に成形されたこ とを特徴とする請求の範囲第 1項記載の医療用鏠合保持部材。
3 . 上記高分子材料が、 常温で伸縮性及び柔軟性を有する材料であ ることを特徴とする請求の範囲第 1項記載の医療用縫合保持部材。
4 . ヒ記保持部材本体に、 ヒ記自動縫合器の縫合部に装着した際の 脱落防止手段が設けられたことを特徴とする請求の範囲第 1項記載 の医療用縫合保持部材。
5 . 上記脱落防止手段は、 上記保持部材本体の開口部が形成された 基端部側に形成された肉厚部であることを特徴とする請求の範囲第 4記載の医療用縫合保持部材。
6 . 上記脱落防止手段は、 上記保持部材本体の内周面に形成された 微小凹凸からなる粗面としたことを特徴とする請求の範囲第 4項記 載の医療用縫合保持部材。 ― .
7 . 上記脱落防止手段は、 上記保持部材本体の内周面に軸方向に亘 つて形成された複数の突条部であることを特徴とする請求の範囲第 4項記載の医療用縫合部材。
8 . 上記脱落防止手段は、 上記保持部材本体の内周面の周回り方向 に形成された複数の突条部であることを特徴とする請求の範囲第 4 項記載の医療用縫合部材。
9 . 上記脱落防止手段は、 上記保持部材本体の内周面に軸方向に亘 つて形成された複数の突条部と、 上記保持部材本体の内周面の周回 り方向に形成された複数の突条部からなる請求の範囲第 4項記載の 医療用縫合部材。
1 0 . 上記保持部材本体は、 透明な天然若しくは合成高分子材料に より成形されたことを特徴とする請求の範囲第 1項記載の医療用縫 合材。
1 1 . 上記保持部材本体に、 軸方向に連なる直線の表示線を設けた ことを特徴とする請求の範囲第 1項記載の両用縫合部材。
1 2 . 上記保持部材本体の軸方向に、 一定間隔で目盛り線を設けた ことを特徴とする請求の範囲第 1項記載の医療用縫合部材。
1 3 . 上記保持部材本体は、 基端部側から先端側に向かって徐々に 縮径するテーパ状に形成されたことを特徴とする請求の範囲第 1項 記載の医療用縫合部材。
1 4 . 上記保持部材本体の表面に親水性ポリマ一を被着したことを 特徴とする請求の範囲第 1項記載の医療用縫合部材。
1 5 . 上記保持部材本体の表面に親水性処理が施されたことを特徴 とする請求の範囲第 1項記載の医療用縫合保持部材。
1 6 . 上記高分子材料が、 生体吸収性高分子材料であることを特徴 とする請求の範囲第 1項記載の医療用縫合保持部材。 '
1 7 . 上記天然高分子材料が、 天然ゴム、 コラーゲン、 ゼラチン、 又はキチン · キトサンであることを特徴とする請求の範囲第 1項記 載の医療用縫合保持部材。
1 8 . 上記天然の高分子材料の主たる成分が生体組織であることを 特徴とする請求の範囲第 1項記載の医療用縫合保持部材。
1 9 . 上記合成高分子材料が、 脂肪族ポリエステル、 脂肪族酸無水 物、 脂肪族ポリカーボネイ ト、 ポリホスファゼン、 又は少なく とも それらの 1つを含む共重合体であることを特徴とする請求の範囲第
1項記載の医療用縫合保持部材。
2 0 . 上記合成高分子材料が、 ポリグリコール酸、 ポリ乳酸、 ポリ 一 £—力プロラク トン、 ポリ一 ?ーヒ ドロキシアルカノエート、 又 はそれらの 1つを含む共重合体であることを特徴とする請求の範囲 第 1項記載の医療用縫合保持部材。
2 1 . 上記合成高分子材料が、 ポリ一£一力プロラク トンを少なく とも 3 0 mol %以上含む共重合体であることを特徴とする請求の範囲 第 1項記載の医療用縫合保持部材。
2 2 . 上記合成高分子材料が、 ポリ一 5—ヒ ドロキシアルカノエー トを少なく とも 3 0 mol %以上含む共重合体であることを特徴とする 請求の範囲第 1項記載の医療用縫合保持部材。
2 3 . 上記高分子材料が、 天然高分子材料と合成高分子材料の複合 体であることを特徴とする請求の範囲第 1項記載の医療用縫合保持 部材。
2 4 . ステ一プルラインを有する自動縫合器に装着して用いられる 医療用縫合保持部材において、 - 天然若しくは合成高分子材料により筒状に一体に成形され、 基端 部側に上記自動縫合器の縫合部への装着を可能となす開口部が形成 された一対の保持部材本体を備え、 上記一対の保持部材本体は、 それぞれ色彩を異にすることを特徴 とするる医療用縫合保持部材。
2 5 . ステ一プルラインを有する自動縫合器に装着して用いられる 医療用縫合保持部材において、
天然若しくは合成高分子材料によりなる糸を筒状に編んで形成さ れた保持部材本体と、
上記保持部材本体の外周面に一体的に形成された天然若しくは合 成高分子材料により表皮とからなる部なる医療用縫合保持部材。
2 6 . 上記表皮は、 親水性を有する天然若しくは合成高分子材料か らなることを特徴とする請求の範囲第 2 5項記載の医療用縫合保持 部材。
2 7 . ステ一プルラインを有する自動縫合器に装着して用いられる 医療用縫合保持部材において、
天然若しくは合成高分子材料により、 筒状に一体に成形され、 基 端部側に上記自動縫合器の縫合部への装着を可能となす開口部が形 成された保持部材本体を備え、
上記保持部材本体に分離容易線を設けたことを特徴とする医療用 縫合保持部材。
2 8 . 上記分離容易線は、 上記保持部材本体の開口部側から先端部 側に亘つて形成された第 1の切取容易線と、 上記保持部材本体の先 端側に位置して上記保持部材本体の周回り方向に形成された第 2の 分離容易線とから成ることを特徴とする請求の範囲第 2 7項記載の 医療用縫合保持部材。 ' 2 9 . 上記第 1の切り取り容易線は、 保持部材本体の開口部側から 先端部側に亘つて相対向して一対設けられ、 第 2の切り取り容易線 は、 一対の第 1の切り取り容易線間に亘つて上記保持部材本体の略 半周に亘つて形成されたことを特徴とする請求の範囲第 2 8項記載 の医療用縫合保持部材。
3 0 . 上記第 2の切り取り容易線は、 切断線として形成され、 上記 切断線により切断された上記保持部材本体の先端部の切断面に把持 用の突片を設けたことを特徴とする請求の範囲第 2 9項記載の医療 用縫合保持部材。
PCT/JP1998/001490 1997-03-31 1998-03-31 Element de maintien de suture utilisable a des fins medicales Ceased WO1998043543A1 (fr)

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DE69838576T DE69838576T2 (de) 1997-03-31 1998-03-31 Nähfadenhaltevorrichtung für ärztliche behandlung
EP98911145A EP0922435B1 (en) 1997-03-31 1998-03-31 Suture retaining member for use in medical treatment
AU65214/98A AU746934B2 (en) 1997-03-31 1998-03-31 Suture retaining member for use in medical treatment
CA002256321A CA2256321C (en) 1997-03-31 1998-03-31 Suture retaining member for use in medical treatment
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JP4122066B2 (ja) 2008-07-23
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ES2296330T3 (es) 2008-04-16
CA2256321A1 (en) 1998-10-08
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ATE375755T1 (de) 2007-11-15
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CA2256321C (en) 2007-03-27
KR20000016118A (ko) 2000-03-25

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