WO2010031812A1 - Site implantable avec septum à précontrainte bidirectionnelle - Google Patents
Site implantable avec septum à précontrainte bidirectionnelle Download PDFInfo
- Publication number
- WO2010031812A1 WO2010031812A1 PCT/EP2009/062051 EP2009062051W WO2010031812A1 WO 2010031812 A1 WO2010031812 A1 WO 2010031812A1 EP 2009062051 W EP2009062051 W EP 2009062051W WO 2010031812 A1 WO2010031812 A1 WO 2010031812A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- perforated tube
- chamber
- compression
- penetrable
- sleeve
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/0208—Subcutaneous access sites for injecting or removing fluids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/04—Access sites having pierceable self-sealing members
- A61M39/045—Access sites having pierceable self-sealing members pre-slit to be pierced by blunt instrument
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
- A61M2039/0072—Means for increasing tightness of the septum, e.g. compression rings, special materials, special constructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
- A61M2039/0081—Means for facilitating introduction of a needle in the septum, e.g. guides, special construction of septum
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
- A61M2039/009—Means for limiting access to the septum, e.g. shields, grids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/0208—Subcutaneous access sites for injecting or removing fluids
- A61M2039/022—Subcutaneous access sites for injecting or removing fluids being accessible from all sides, e.g. due to a cylindrically-shaped septum
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/0208—Subcutaneous access sites for injecting or removing fluids
- A61M2039/0226—Subcutaneous access sites for injecting or removing fluids having means for protecting the interior of the access site from damage due to the insertion of a needle
Definitions
- the present invention relates to the field of implantable medical devices for injecting or withdrawing fluid into the body of a patient, called "implantable sites”.
- the present invention more particularly relates to an implantable medical device intended for the injection and / or sampling of fluid substance in a human or animal organ and comprising a chamber intended to receive said fluid substance, said chamber being delimited by a wall which presents the less a penetrable portion at which said wall can be pierced in the direction of its thickness by a needle for injecting or puncturing the fluid substance in the chamber, said device comprising transverse compression means of the penetrable portion arranged to constrain said penetrable portion in compression in at least a first direction substantially transverse to the direction of the thickness of the wall.
- implantable site intended to form a remote access point allowing the transfer of substances to or from the blood circulation network, tissues d an organ, or an inflatable implant such as a balloon or a constriction ring.
- such an implantable site is in the form of a housing in which is formed a chamber which communicates with a flexible catheter connecting said housing to the target zone for which is intended the substance injected, respectively from which the substance levied.
- the wall of the housing In order to allow access to the chamber by a hollow needle, the wall of the housing generally has a puncture zone formed by a self-sealing membrane, or "septum", made of an elastomeric material, so that the sealing of the site is preserved both when the eel pierces the wall and when it withdraws from it, the hole formed by said needle closing automatically when extracted from it by elastic self-healing phenomenon.
- the known sites are generally provided with relatively thick self-sealing membranes and which have a small extent, so that that they can be inserted by force into a housing formed in the housing which ensures their compressive prestress in a direction substantially transverse to the normal direction of penetration of the needle.
- the puncture areas of the prior art frequently have a useful area and relatively limited accessibility compared to the overall size of the implantable site.
- the dimensional and qualitative manufacturing tolerances for the known septa are generally broad, so that it is necessary, prior to assembly operations of the implantable site, to make a rigorous selection to the septum, as a function of its dimensions but also its hardness, to ensure that it can be properly assembled with the housing while ensuring the level of sealing required.
- these selection and control stages tend to lengthen and complicate the production cycle, to the detriment of the cost price of the device.
- the objects assigned to the present invention therefore aim at overcoming the aforementioned drawbacks and at proposing a new implantable medical device intended for the injection and / or sampling of fluid substance in a human or animal body which has an optimized and particularly durable seal .
- Another object assigned to the invention is to propose a new implantable medical device which is particularly easy to access for the practitioner after implantation.
- Another object assigned to the invention is to provide a novel, non-traumatic medical device which minimizes the inconvenience to the patient.
- Another object assigned to the invention is to propose a new implantable medical device that is particularly simple and compact structure.
- Another object assigned to the invention is to propose a new implantable medical device that is inexpensive to manufacture, simple to assemble and particularly tolerant vis-à-vis the manufacturing heterogeneities of its various components.
- an implantable medical device intended for injection and / or m removal of fluid substance in a human or animal body and comprising a chamber intended to receive said fluid substance, said room being delimited by a wall which has at least one penetrable portion at which said wall can be pierced in the direction of its thickness by a needle for injecting or puncturing the fluid substance in the chamber, said device comprising transverse compression means of the penetrable portion arranged to constrain said penetrable portion in compression in at least a first direction substantially transverse to the direction of the thickness of Is wall, said device being characterized in that it is provided with retaining means designed to oppose buckling outwardly of the device of the penetrable portion under the effect of the compression exerted by the transverse compression means.
- FIG. 1 shows: according to an exploded perspective view, a first embodiment of implanable medical device according to the invention.
- FIG. 2 illustrates, in a cutaway perspective view of material in a longitudinal plane, the medical device of FIG. 1 in assembled configuration
- FIG. 3 and Figure 4 illustrate, in perspective views, two embodiments of retaining means according to the invention.
- FIGS. 5A, 5B, 5C, 5D, 5E and 5F represent another alternative embodiment of this holding means according to the invention, respectively seen in perspective, on the side, in a first transversal section and a second cross section, in longitudinal section and in an enlarged detail view in cross section.
- FIG. 6 illustrates, in an exploded perspective view, a second embodiment of an implantable medical device according to the invention, in which are implemented the retaining means illustrated in Figures 5A to 5F.
- FIG. 7 illustrates, in a longitudinal sectional view, the medical device corresponding to the second variant embodiment of an implanting medical device represented in FIG. 6.
- the invention relates to an implantable medical device 1 for injecting and / or removing fluid substance (s) from a human or animal body
- Such a device also designated by the term “implantable site”, is intended to be implanted surgically in the body of a patient, preferably under the skin of said patient, to form an access point for the patient. introduction or extraction of fluid substance (s) within the body of said patient.
- the device 1 can be implemented and adapted for different uses.
- the device 1 may be designed for injection and / or the removal of fluid in an organ or in the circulatory system: for example to allow the injection of drug substance (s) .
- said device 1 can be adapted to form a vein or an artificial artery that the practitioner can stitch through the skin, in the manner of a natural vein: to inject a therapeutic substance or to draw blood.
- the device 1 according to the invention can also be adapted to supply implanted reservoirs, for example associated with insulin pumps with analgesics.
- Said device 1 can finally be adapted for injecting and puncturing fluid into the inflatable compartment of a surgical implant, such as an artificial sphincter, a balloon or a gastric ring intended to achieve a constrictien of the stomach for fight against obesity,
- a surgical implant such as an artificial sphincter, a balloon or a gastric ring intended to achieve a constrictien of the stomach for fight against obesity
- the device 1 constitutes a hypodermic device, that is to say that it is intended to be positioned just under the skin of the patient, although said device 1 may possibly be implanted at other places in the body of the patient and more profent without departing from the scope of the invention.
- the device 1 comprises a chamber 2 which is intended to accommodate the fluid substance injected or removed.
- Said chamber 2 is delimited by a wall 3 which has at least one penetrable portion 4 at which said wall 3 can be pierced in the direction of its thickness e by a needle 5 for injecting or puncturing the fluid substance in the chamber 2
- the penetrable portion 4 thus forms a puncture zone designed to ensure the sealing of the device 1, both during stitching by the needle 5 and the fluid transfer, as a result of the withdrawal of said needle 5.
- the penetrable portion 4 is formed by a septum made of a self-sealing material capable of being perforated by the needle.
- self-sealing material it is indicated that the material intrinsically has elasticity properties that make it particularly suitable for closing automatically the orifice generated therein by the stitching, suitable for extraction of the needle.
- said penetrable portion 4 is formed by a septum of biocompatible elastomer material, in particular silicone, and may be, for convenience of description, assimilated to said septum in the following.
- the device 1 also comprises transverse compression means 10 of the penetratable portion 4, the said transverse compression setting means being arranged to constrain the said penetrable portion 4 in compression, according to at least one first direction D 1 substantially transverse to the direction of the thickness e of the wall 3.
- the compression means 10 make it possible to exert and maintain a compression prestressing F1 within the septum, which has the effect of improving the tightness of the latter by facilitating and accelerating in particular its self- cicatrization after removal of the needle.
- the transverse compression is exerted in a first direction D1 substantially perpendicular to the path taken by the needle 5 through the wall 3 to enter the chamber 2.
- the first direction D1 application of the compression force F1 may be substantially parallel to one and / or the other d ⁇ sdttes surfaces 41, 4H.
- compression prestressing F1 is advantageously carried out permanently, whether or not the chamber 2 is filled with fluid substance : that is to say substantially sustainably and independently of the pressure that prevails in said chamber.
- the penettrabi ⁇ portion 4 has a generally convex shape vis-à-vis the outside, so as to allow access to the chamber 2 from outside the device 1 according to a total angular sector greater than or equal to 90 degrees, preferably greater than or equal to 180 degrees, and particularly preferably substantially equal to 360 degrees.
- the cumulative angular coverage of the puncture area around the device advantageously provides lateral access to said device according to a wide variety of directions of approach of the needle 5, and ConstantJelieme ⁇ t over the entire periphery of the device 1.
- the convexity of the chamber 2 and the penetrable portion 4 can be obtained by means of a curved continuous septum or a plurality of distinct s ⁇ ptums focusing a plurality of access facets to the chamber.
- the penetrating portion 4 forms a substantially cylindrical sleeve surrounding the chamber 2.
- the penetrable portion 4 is thus like a hollow cylinder, preferably a alone.
- the penetrating portion 4 can be likened to a sleeve dancs the following.
- cylinder in this case any solid obtained by extrusion of a base surface along a generator.
- the geometry of the base surface is not limited, DCte-ei can in particular be polygonal, elliptical or circular, and constant or variable section along (a generatrix.
- the device 1 and, in particular, the chamber 2 may generally have a straight cylindrical, ovoid, ellipsoid, piriform or polyhedral shape.
- the use of a substantially cylindrical septum makes it possible to confer on the device 1 W ⁇ B a relatively simple structure, compact, light, atraumatic, and which remains accessible even if the implant site is turned over on itself.
- the generatrix of the sleeve corresponds to a regenerating axis (ZZ) recilinear, the base section being formed by a ring, so that the chamber Z is delimited by a wall 3 substantially forming a straight cylinder and hollow.
- the generating axis (ZZ 1 ) of the sleeve forming the penstrabte portion 4 is substantially parallel to the first channel D1 according to which said penetrable portion 4 is constrained in compression by the transverse compression means 10,
- the sleeve is crushed in compression substantially along its generating axis (ZZ ') by the compression means fcransverse 10 which tend to force the approximation of its ends 4A, 4B, which preferably correspond to the edges of the penetrable portion 4 arranged substantially normal to the generator (Z2 V ).
- the means of compression in the reverse 10 may include means for gripping the sleeve, such as a first flange 11 and a second flange 12 bearing respectively at the level of the first and second end the sleeve 4A, 48 Power, the said flanges being forced "n approximation, according to the generating axis (ZZ '), a year suitable mechanical member such as a pulling
- the first and second flasks 11, 12 are made of a rigid, solid, puncture-resistant material.
- the device 1 is also provided with retaining means 20 designed to resist buckling near i'forged said device 1, the penetrable portion 4 under the effect of the compression exerted by the transverse compression means 10.
- the retaining means 20 enable iimiter: even prevent distortion of "a penetrable portion 4 by bending outwardly of the chamber 2 when said penetrable portion is subjected to the IF transverse compressive force, and in particular at the end compression exerted by the first and the second flange 11, 12.
- the retaining means 20 can considerably increase the shearing effect which affects the sepium during the extraction of the needle 5, as well as the fatigue work due to the excessive stresses which to undergo septurn the repeated movements of penetration and extraction of said needle 5. the longevity of the site is improved.
- the combination of the means for compressing the compression device 10 and the retaining means 20 in accordance with the invention makes it possible to improve the appearance of the penetrable portion 4 over a wide area while at the same time ensuring the good mechanical strength of the device. 1, and in particular the small deformation of the wall 3 and the chamber 2, both at rest and during the insertion or withdrawal operations of the needle 5.
- the stretch of the portion ⁇ é ⁇ étrabls 4, measured in the first direction tra ⁇ sverse D1 is preferably greater than the thickness ⁇ of said portion penettrabl ⁇ 4.
- the "height" h of the sleeve, measured seion Tax generator (ZZ ' ) can be at least twice, three times, or even five times larger than the thickness ⁇ .
- Accessibility to the chamber can therefore be optimized, without increasing the overall size, and especially the diameter : the device 1
- the penetrant portion 4 extending ⁇ nli ⁇ a first end 4A and a second end 48, the retaining means 20 having at least ur,> external support member 21. disposed opposite the chamber 2 with respect to the penetrable portion 4, between first and second end 4A, 4B, to form a stop against said penetrable portion 4.
- a te! external support member 21 is able to exert, preferably center Ja external face 4 E of the penetrable portion 4 and at a distance from the ends thereof a substantially radially F2 retaining force! and centripetal which prevents, or at the very least limit, the centrifugal radial deformation in its central region most affected by buckling.
- the external support member 21 forms a mechanical support element that supports the porous portion 4 from the outside, in order to obstruct the free centrifugal displacement of the penetrable portion 4 in which the buckling phenomenon is likely to train the latter.
- the support member 21 comprises at least one strapping element, such as a stretcher, which projects from the wall 3 while substantially conforming to the external contour of the penetratable portion 4.
- a strapping element such as a stretcher
- said one or more deformation elements are substantially rigid, and at least stiffer, and therefore more resistant to deformation under mechanical stress, than the material constituting the septum, and preferably distinct and removable from said s ⁇ ptum.
- the strapping element or elements are preferably arranged substantially perpendicularly to the generator axis (72!) Of the sleeve, and where appropriate staggered along the axis .u ⁇ .
- the support member 21 comprises a plurality of separate strapping rings which are superimposed on the wall 3 while wedging the outer contour of the penetrable portion 4 .
- the strapping rings are housed in annular grooves hollowed on the external surface AE of the sleeve, at a distance from each other, and substantially enclose the entire perimeter of the paro 3.
- the buckling of the sleeve forming the penetrable portion 4 is generally limited by dividing the total height of the sleeve, measured along the generating axis (ZZ '): into a plurality of fictitious sections of lesser height, at which the buckling is less pronounced. .
- the strapping elements make it possible to define nodes at the level of the penetrable portion 4, without however having to affect the physical integrity of the septum, and in particular the continuity of the latter, the septum free spaces. arranged between the said strapping elements forming in turn the bellies of the said penetrative portion likely to deform slightly against the outside under feffei compression transverse.
- such an arrangement allows the implementation of a septum in one piece despite its high height, which simplifies the manufacture and limits the risk of leakage that would be inherent in the multiplication of joint assembly at within the implantabte site
- the strapping element is formed by a perforated tube 22 which is made of a material resistant to perforation and which comprises one or more light (s) 23 arranged (s). to allow the passage of the needle 5.
- the internal surface 22! perforated tube 22 forms the support member 21 capable of opposing the deformation outwardly of the detachable portion 4, while access to the chamber through said tube 22 which I surround is preserved by the 23 lights implementation that little needle! to cross to cross the tube and then cross the porchable portion 4. until you reach the room 2.
- the sleeve forming the pe ⁇ étrable portion A and the perforated tube 22 are substantially coaxial, and preferably contiguous, the generator axis (ZZ ') of the sleeve being substantially coincident with the generatrix dud ⁇ i perforated tube 22,
- the support member 21 may advantageously be in the form of a perforated sheath, threaded around the septum and preferably having an inner face 22! fomne substantially conjugate to the outer face 4E of the latter, the geometry of such a support member 21 is of course not limited to a particular embodiment.
- the perforated hjbe 22 however has a geometry ⁇ / straight lindrique, the slots 23 being pierced on its curved side wall.
- the perforated tube 22 will be made, preferably in one piece, in a more rigid material than septum, preferably biocompatible and particularly preferably in titanium, polycarbonate (PC), pcly-ether -ether-ketone (PEEK). poly-sulfone (PSU) or any other suitable material,
- said perforated tube 22 will preferably have a substantially constant thickness, as well as internal and external surfaces 221, 22E that are substantially smooth and regular to ensure a good comfort of use to the patient.
- the perforated tube 22 may constitute a single strapping element, covering substantially the entire outer surface 4E, and more particularly the entire external lateral surface of the septum.
- the solid zones 24 of the perforated tube 22 situated between the neighboring lumens 23 ensure, on the one hand, the cohesion of said perforated tube 22, and on the other hand each offer a fulcrum against which the outer surface 4E of the sleeve rests.
- the range of each of the apparent zones of the septum is advantageously reduced between two consecutive points of support, that is to say the transverse dimension of each of the zones accessible to the needle (because not covered by a solid zone 24), so that the global buckling sensitivity of said septum is considerably reduced.
- the perforated tube 22 may form a kind of rigid exoskeleton which gives the device 1 its functional form and substantially maintains said functional form, and more particularly the useful volume of the chamber 2 in time.
- the openings 23 are pierced in a substantially normal drilling direction to the faces of the perforated tube 22, that is to say that the latter is hollowed in a substantially radial direction with respect to the generator charge (ZZ).
- Said said lights 23 may in particular be formed by circular holes, as is illustrated in FIG. 3 or else by windows square, rectangular, or polygonal as shown in FIG. 4.
- the slots 23 are formed by holes of circular sections arranged substantially racially around the generator axis (2Z ') of the perforated tube 27. ..
- said perforated tube 22 comprises a plurality of slots 23 distributed in at least one row, that is to say substantially along a ring of ordinate constant with respect to the generating axis (ZZ 1 ), on the majority: even the totality of its periphery.
- the lights 23 are all substantially identical, and distributed: within a same row, equidistantly, and preferably edge to edge, in a substantially constant angular pitch such that it is in particular illustrated in Figures 5C and SD.
- the perforated tube shown in Figures 5A to SF has 10 rows of twenty-five lights each.
- the angular pitch being 14.40 e .
- the perforated tube 22 may be provided with several successive rows of lights 23 shelves along the generator axis (ZZ '), te ⁇ dits rows being partially preferentially offset from each other so as to be staggered.
- each row has a constant angular pitch and identfqu ⁇ to that of neighboring rows, and is angularly offset by "equivalent to an angular half-step relative to the rows which are immediately adjacent thereto. It is thus advantageously possible to obtain a matrix arrangement of the apertures 23 which optimizes the proportion of the outer surface 22E of the tube which remains permanently “pierceable” by the needle S, while minimizing the residual stretching of the solid zones 24, resistant to perforation, which connect the neighboring lights 23 between wings and ensure the cohesion of the perforated tube 22.
- the slots 23 comprise a chamfered portion 23A that tapers outwards and are also terraced, so that the outer surface 22E of the perforated tube a honeycomb appearance.
- each light 23 is thus delimited BU level of the outer surface 22E to the tube by six edges 2 ⁇ distributed in hexagon.
- the flared shape of the chamfered portions 23A is in no way limited, and may for example correspond to a truncated cone whose slopes are substantially rectiiigne, or to a cone whose slopes are substantially curved from the ridge 25.
- the lights 23 preferably have the straight portion 23B : advantageously cylindrical, situated in the extension of the chamfered portion towards the chamber 2, in order to ensure the guiding of the needle 5 in a direction of substantially centripetal radial penetration.
- a te! arrangement avoids a perforation "Tang &nti" of the device 1 by Palguiite ⁇ according to which the latter has an incident direction sufficiently grazing to remain locked in the thickness of the sleeve forming the penetrable portion 4, without opening into the chamber 2,
- each light 23 has a function of "funnel” that allows it to "capture” the needle 5 incident in the wide section of the chamfered portion 23A, then converging it by folding it gradually towards the narrow cross-section which in turn guides it through the thickness of the perforated tube, then through the septum, to the center of the chamber 2.
- the depth of the chamfered portion may represent about one third of the thickness of the perforated tube 22. While the right portion 23B will represent about the remaining two thirds of this same thickness.
- the dimensions of the straight portion 23B, and in particular its diameter and its guiding range, will depend on the size of the straight portion 23B . one of the other and will be determined according to the range of diameters of the needles 5 that one wishes to use with the device 1.
- the first flange 11 is preferably designed to be fixed to the perforated tube 22 and to form a stop to meet the displacement at the sleeve forming the penetrable portion 4. . '.
- said first (Issqoe 11 is integral with the perforated tube 22 S and can be advantageously located at its end so as to form the bottom of said perforated tube 22. Said tube is then in the form of a blind shell.
- the second flange 12 can be assembled by screwing onto the perforated tube 22 and have a portion 12A arranged to protrude into said tube and bear against the sleeve forming the portion penetrable 4, substantially opposite the first flop 11.
- the septum is thus sandwiched along the generating axis (ZZ '). . between the first and the second flange,
- This tube is preferably provided with an internal thread 26 with which cooperates an external thread cut at the periphery of the projecting portion 12A of the flange. This guarantees the compactness of the site, as well as the regularity of its apparent surface and its atraumannic character.
- the arrangement according to the invention gives the site 1 a particularly simple and compact structure, the assembly of which is both easy and insensitive to manufacturing tolerances of the perforated tube or the septum.
- the assembly is operated by threading, or simply fitting the septum inside the perforated tube 22, then bringing the second flask 12 in its manner a crown screwed on said tube, screwing said second flange 12 allowing advantageously to adjust the degree of compression of said teptum, catching any potential deviations, especially height, related to manufacturing ataas dudlt septum.
- the transverse compression means 10 are therefore advantageously adjustable, so as to allow, at least during the assembly of the device 1, the continuous adjustment of the transverse compression prestress F1 which they exert on the penetrable portion 4.
- the transyerse 10 compression means may be sized (of marl as the septum) to cause a longitudinal contraction of the septum of the order of 5% to 10% of its height at rest.
- the second flange 12 may advantageously serve as a support for a cannula 30 enabling the device to be connected to a catheter (not shown) and to put the chamber in communication with this device. latest.
- said cannula 30 is centered with respect to the second flange 12 and aligned with the perforated tube 22 and the sleeve along the generating axis (ZZ ').
- the device 1 comprises an anti-piercing screen 31 disposed in the chamber 2 so as to prevent a needle 5 penetrating into said chamber 2 by an entry point located in the The penetrable portion 4 can not pass through the device 1 from one side to the other and exit at an exit point, again crossing the penetratable portion 4 substantially opposite the entry point : in particular when the penetrating portion 4 has an extent important or curved shape,
- said anti-piercing device will comprise a plurality of plates disposed substantially parallel to the generating axis (22 '). joined to each other by one of their ends and ⁇ errtées substantially radlatement relative to said generator axis, cJ ⁇ so as to form a star, for example to six branches.
- the said plates will extend substantially over the entire height h of the septum, that is to say substantially from the first flange 11 to the second flange 12.
- the second flange 12 will preferably have a central clearance 32 allowing passage for the screen 31, so that the projecting portion 12A of the flask can bear substantially annular support on the sleeve, and thus to allow a tightening under stress dudlt sleeve, without Gamet second flasque 12 s / ⁇ nn ⁇ abut prematurely against the screen ant ⁇ ranspercem ⁇ nt 31 and is blocked by him during screwing.
- the anti-piercing screen 31 is made of a rigid material, such as Utane, so as to reinforce the structure of the device 1, and in particular to provide additional support for the septum.
- the sepiurn may be provided with longitudinal grooves 33 designed to accommodate the free ends of the plates of the screen.
- the site 1 preferably comprises an outer casing 34, made for example of silicone, in order to perfect the dressing and the atraumaîic finish of the site implantabls 1.
- the wall of the site 1 then has a multicouh structure, the perforated tube 22 located between the outer casing 33 and the septum 4.
- the implantable site 1 may be provided with bidirectional or sepium compression means able to exert and simultaneously maintain the penetrable portion 4 in compression substantially in the direction of its thickness e, that is to say substantially in the predictable direction of penetration of the needle 5, in this case substantially radial, but also in at least one of the directions transverse to this thickness, that is to say according to A direction substantially perpendicular to the penetration direction faiguiile 5, in this case substantially longitudinal.
- the retaining means 20 may be arranged to prestress in compression the penetrable portion 4 of the wall 3 in the direction of its thickness e.
- the septum may advantageously be encagè in the perforated tube 22, that is to say that the outside diameter at rest of the sleeve forming the p ⁇ nétrable portion 4 is, before assembly, strictly greater than the internal diameter of said perforated tube 22, by example of 5% to 15% and preferably 6% to 10%. It is thus possible to obtain an assembly of the two elements by forced fitting or fretting, with appearance of a residual stress of centripetal radial elastic deformation which durably compresses the sleeve inside the perforated tube.
- the retaining means 20, and in particular the support member 21, are preferably not passive, and go beyond a s arbitrpie retaining function, that is to say that they do not "passively" exercise a simple retention constraint F2 only when the penetratable portion 4 is subjected to buckling, but indeed constrains me of active compression sufficient to elastically deform the septum. and this, from the assembly and regardless of whether there is a transverse compressive stress F1.
- the retaining means 20 are capable of exerting of themselves a compressive stress F2 which is non-linear, in this case radial and centripetal, on the external surface 4E of the penetrating portion 4, and preferably substantially on the together said outer surface so as to obtain ur * e construction of the sleeve.
- an air-passing screen 31 advantageously makes it possible to limit the tightening of the internal diameter of the sleeve, and consequently both to maintain the functional volume of the chamber 2, and to improve the compression of said sleeve. sleeve in the direction of its thickness. Moreover: it is remarkable that this improvement of the bi-directional compression sealing of a septum, simultaneously in the direction of penetration of the needle and at least one direction substantially perpendicular to said direction of penetration, could advantageously be put implemented in other applications requiring a puncture-resistant puncture system! that the closure of a bottle containing a substance to be preserved from its environment, including a therapeutic substance.
- the device 1 according to the invention may have substantially the following dimensions and proportions, in the particular case of a device adapted to a hollow needle of diameter equal to 0.9 mm:
- outer diameter equal to 14 mm, thickness equal to 3.35 mm, length equal to 17.5 mm;
- perforated tube overall length equal to 20.5 mm, internal diameter equal to 14 mm, wall thickness of between 0.8 mm and 2 mm, and preferably close to 1.5 mm;
- the device 1 according to the invention will be adapted according to the standard format or formats of hollow needles used for the application corresponding, and diameter of the lights 23 will naturally be determined accordingly.
- the device 1 may be provided with a possibly embossed and / or radiopaque marking, allowing the practitioner to identify immediately, having and / or after implantation, hollow needle formats compatible with iedtt device 1 .
- the invention also relates as such to a medical kit comprising on the one hand at least one device 1 according to the invention e ⁇ on the other hand a set of hollow spikes 5 diameter adapted to said device.
- the manufacturing method according to the invention comprises at least one step (a) of transverse compressive prestressing during which it causes the compression of the pè ⁇ étrable portion 4 in at least a first direction D1 substantially transverse to the direction of its thickness, and a step (b) of retaining during which it comes oppose the free buckling outwardly of the device ⁇ & penetrated portion 4 under the effect of transverse compression.
- the step (b) of retaining comprises a sub-step ⁇ 01 ⁇ bearing in the course of which one comes to have a support member 21 against the penetriable portion 4 to prevent deformation and displacement of the latter under the effect of transverse compressive stress R.
- the substep (b1) support is carried out by threading a strapping element around the sleeve, so as to come and grip it.
- the sub-step (b1) of support it comes to substantially cover the entire outer surface 4E of the penettrabte portion 4, for example by means of a perforated tube forming sheath.
- the step (a) of compressive prestressing is carried out in two stages, firstly by placing the sleeve in abutment against a first flange 11 forming the bottom of the perforated tube 22, then reporting to the other end.
- said tube 22 a second flap 12 which penetrates into said t ⁇ to & up to compress the opposite extremity of the sleeve, hitherto remained free.
- the compression prestressing step (a) may be preceded by a screen insertion step during which a screen is inserted into the chamber 2, that is to say in the hollow of the sleeve. piercing 31, preferably after having threaded said sleeve into the perforated tube 22.
- the assembly method according to the invention may comprise a successive interlocking step in the course of which a cylindrical septum 4 substantially coaxial with said tube is reported inside a perforated tube 22, then possibly an air-transporting screen 31 also coaxial with the aforementioned elements, then a step of closing the assembly by means of a lid formed by the second flange 12.
- the manufacturing method according to the invention comprises a step (c) of compression of the septum in the direction of its thickness, which is preferably carried out by returning within the perforated tube 22 a cylindrical septum of diameter at rest greater than the inner diameter of the tube, for example by forced fitting, or shrinking, so as to force the elastic contraction radlate and centripetal man ⁇ hon in the interior and in contact with the perforated tube of smaller diameter.
- the assembly method according to the invention will preferably comprise a step (d) of manufacture of the septum during which there will be realized, for example by molding, a cylindrical sleeve of diameter at rest * substantially greater than that of the tube perforated.
- the manufacturing method will also preferably comprise a step of producing the perforated tube 22, for example by decolourization, in the course of which we will first realize a blind cylinder and radial bores so as to form on the curved wall of said cylinder , a honeycomb structure permeable to perforation.
- the manufacturing method according to the invention allows for a site substantially having a geometry of revolution around its generator axis (ZZ '), which greatly facilitates its assembly, and further improves its accessibility.
- site 1 remains compact and accessible widely and permanently, without requiring intervention of the practitioner par ⁇ cu ⁇ ère.
- the design of the device 1 according to the invention in which teptum is compressed both radially and iongitudinatement, makes it possible to catch up with the assembly manufacturing dispersions in terms of quality of the silicone.
- the Im STEMantable site according to the invention has a functional volume of the important chamber while maintaining a small footprint overall.
- the thickness of the septum may advantageously be reduced without adversely affecting the crush strength of said chamber during stitching or movements exerted by the patient, or sealing the site.
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/119,565 US8328773B2 (en) | 2008-09-18 | 2009-09-17 | Implantable site with septum prestressed in two directions |
| EP09783118A EP2367592A1 (fr) | 2008-09-18 | 2009-09-17 | Site implantable avec septum à précontrainte bidirectionnelle |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0805146A FR2935904B1 (fr) | 2008-09-18 | 2008-09-18 | Site implantable avec septum a pre-contrainte bidirectionnelle |
| FRFR0805146 | 2008-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010031812A1 true WO2010031812A1 (fr) | 2010-03-25 |
Family
ID=40350066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2009/062051 Ceased WO2010031812A1 (fr) | 2008-09-18 | 2009-09-17 | Site implantable avec septum à précontrainte bidirectionnelle |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8328773B2 (fr) |
| EP (1) | EP2367592A1 (fr) |
| FR (1) | FR2935904B1 (fr) |
| RU (1) | RU2011115007A (fr) |
| WO (1) | WO2010031812A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130103006A1 (en) * | 2011-10-19 | 2013-04-25 | Palyon Medical (Bvi) Limited | Mesh protection system |
| ES2973834T3 (es) * | 2013-04-13 | 2024-06-24 | Solinas Medical Inc | Dispositivos de cierre automático, y aparato y métodos para fabricarlos y suministrarlos |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006021695A1 (fr) | 2004-08-19 | 2006-03-02 | Companie Europeenne D'etude Et De Recherche De Dispositifs Pour L'implantation Par Laparoscopie | Site medical implantable |
| WO2008029010A1 (fr) | 2006-09-08 | 2008-03-13 | Compagnie Europeenne D'etude Et De Recherche De Dispositifs Pour L'implantation Par Laparoscopie | Site implantable avec septum multifacette |
| FR2905603A1 (fr) | 2006-09-08 | 2008-03-14 | Cie Euro Etude Rech Paroscopie | Site implantable a obturateur mobile. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5328465A (en) * | 1992-10-30 | 1994-07-12 | Medtronic, Inc. | Apparatus and method for limiting access to septum |
-
2008
- 2008-09-18 FR FR0805146A patent/FR2935904B1/fr active Active
-
2009
- 2009-09-17 WO PCT/EP2009/062051 patent/WO2010031812A1/fr not_active Ceased
- 2009-09-17 EP EP09783118A patent/EP2367592A1/fr not_active Withdrawn
- 2009-09-17 US US13/119,565 patent/US8328773B2/en not_active Expired - Fee Related
- 2009-09-17 RU RU2011115007/14A patent/RU2011115007A/ru not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006021695A1 (fr) | 2004-08-19 | 2006-03-02 | Companie Europeenne D'etude Et De Recherche De Dispositifs Pour L'implantation Par Laparoscopie | Site medical implantable |
| WO2008029010A1 (fr) | 2006-09-08 | 2008-03-13 | Compagnie Europeenne D'etude Et De Recherche De Dispositifs Pour L'implantation Par Laparoscopie | Site implantable avec septum multifacette |
| FR2905603A1 (fr) | 2006-09-08 | 2008-03-14 | Cie Euro Etude Rech Paroscopie | Site implantable a obturateur mobile. |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2935904B1 (fr) | 2010-09-24 |
| FR2935904A1 (fr) | 2010-03-19 |
| RU2011115007A (ru) | 2012-10-27 |
| EP2367592A1 (fr) | 2011-09-28 |
| US8328773B2 (en) | 2012-12-11 |
| US20110172595A1 (en) | 2011-07-14 |
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