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WO2023006073A1 - Instrument de ponction - Google Patents

Instrument de ponction Download PDF

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Publication number
WO2023006073A1
WO2023006073A1 PCT/CN2022/108988 CN2022108988W WO2023006073A1 WO 2023006073 A1 WO2023006073 A1 WO 2023006073A1 CN 2022108988 W CN2022108988 W CN 2022108988W WO 2023006073 A1 WO2023006073 A1 WO 2023006073A1
Authority
WO
WIPO (PCT)
Prior art keywords
puncture
needle
guide tube
puncture device
needle shaft
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/CN2022/108988
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English (en)
Chinese (zh)
Inventor
胡猛
郭栋
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.)
Beijing Medis Medical Technonlgy Co Ltd
Original Assignee
Beijing Medis Medical Technonlgy Co Ltd
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 Beijing Medis Medical Technonlgy Co Ltd filed Critical Beijing Medis Medical Technonlgy Co Ltd
Publication of WO2023006073A1 publication Critical patent/WO2023006073A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3403—Needle locating or guiding means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B17/3421—Cannulas
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3403—Needle locating or guiding means
    • A61B2017/3413—Needle locating or guiding means guided by ultrasound
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B2017/3454—Details of tips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A61B2034/2046—Tracking techniques
    • A61B2034/2063—Acoustic tracking systems, e.g. using ultrasound
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A61B2034/2046—Tracking techniques
    • A61B2034/2065—Tracking using image or pattern recognition

Definitions

  • the invention relates to the technical field of medical devices, in particular to a puncture device.
  • Interventional Radiology is a marginal subject that developed rapidly in the late 1970s. Under the guidance of medical imaging equipment, it is based on imaging diagnostics and clinical diagnostics, combined with the principles of clinical therapeutics, and uses catheters, guide wires and other equipment to diagnose and treat various diseases. That is: under the guidance of imaging medicine (X-ray, ultrasound, CT, MRI), through the percutaneous puncture or through the original orifice of the human body, a special catheter or instrument is inserted into the lesion for diagnostic imaging and treatment. Or tissue collection, cytology, bacteriology and biochemical examination.
  • imaging medicine X-ray, ultrasound, CT, MRI
  • Interventional radiology provides new drug delivery routes and surgical methods for modern medical diagnosis and treatment. Compared with traditional routes of drug administration and surgical methods, it is more direct, effective, simpler and minimally invasive. Interventional radiology has opened up a new way of treatment, and it is simple, safe, less traumatic, less complications, quick effect, minimally invasive; strong repeatability; accurate positioning; high curative effect, quick effect; low incidence of complications; The connection and application of multiple technologies is simple and easy.
  • interventional radiology can be divided into interventional diagnostics and interventional therapy; according to technology, it can be divided into: vascular interventional radiology (drug infusion; embolization technology; formed stent; filter technology, etc.) and non-vascular interventional radiology (puncture biopsy ; drainage technology; foreign body removal; cavity stent, etc.); according to the scope of clinical application, it can be divided into tumor interventional radiology, non-tumor interventional radiology, neurological interventional radiology, etc.
  • vascular interventional radiology drug infusion; embolization technology; formed stent; filter technology, etc.
  • non-vascular interventional radiology puncture biopsy ; drainage technology; foreign body removal; cavity stent, etc.
  • Interventional radiology has a wide range of clinical applications, and can be applied to vascular diseases (such as vascular stenosis, portal hypertension, etc.), heart diseases (mitral valve stenosis, coronary artery stenosis, etc.), tumors (tumor feeding artery infusion chemotherapy, embolization for malignant tumors, etc.) etc.), non-vascular diseases (digestive tract, urinary tract, biliary tract, airway, nasolacrimal duct stenosis, etc.), needle biopsy, etc.
  • vascular diseases such as vascular stenosis, portal hypertension, etc.
  • heart diseases mitral valve stenosis, coronary artery stenosis, etc.
  • tumors tumor feeding artery infusion chemotherapy, embolization for malignant tumors, etc.
  • non-vascular diseases digestive tract, urinary tract, biliary tract, airway, nasolacrimal duct stenosis, etc.
  • needle biopsy
  • transjugular intrahepatic portosystemic shunt transjugular intrahepatic portosystemic shunt, TIPS
  • TIPS transjugular intrahepatic portosystemic shunt
  • the embodiment of the present invention provides a puncture device, which solves the above-mentioned requirements of the existing puncture surgery on the flexibility of the puncture device, and realizes easier to operate, more stable, and thus safer and more effective puncture surgery.
  • the present invention provides a puncture device, comprising: a puncture needle, the puncture needle includes a needle head and a needle shaft, the needle shaft includes an inner needle shaft and an outer needle shaft, and the outer needle shaft covers It is arranged outside the inner needle bar.
  • the outer needle bar is connected to the inner needle bar by welding.
  • the sealing process between the inner needle bar and the outer needle bar is welding or bonding.
  • the inner needle shaft extends beyond the outer needle shaft.
  • the needle head and the needle shaft are integrally formed.
  • the needle head and the needle shaft are connected by welding or threading.
  • the puncture needle includes an auxiliary part sleeved on the needle shaft, and the coefficient of friction of the auxiliary part is smaller than that of the needle shaft.
  • auxiliary part is a spring or a sleeve.
  • the spring is connected to the needle bar by welding.
  • the material of the sleeve is polytetrafluoroethylene, and the sleeve is connected with the needle rod by heat shrinkage.
  • the outer diameter of the distal portion of the needle shaft is smaller than the outer diameter of the proximal portion of the needle shaft, and the spring or the sleeve is sleeved on the distal portion of the needle shaft.
  • the outer needle bar includes a distal outer needle bar and a proximal outer needle bar, the distal outer needle bar is sleeved on the distal end of the inner needle bar, and the proximal outer needle bar is sleeved on the The proximal end of the inner needle bar, the spring or the sleeve is sleeved outside the inner needle bar between the distal outer needle bar and the proximal outer needle bar.
  • the outer diameter of the distal part of the inner needle bar is smaller than the outer diameter of the proximal part of the inner needle bar, and the outer needle bar and the spring are sequentially sleeved on the inner needle bar from the distal end to the proximal end.
  • the distal end portion of the inner needle bar, or the outer needle bar and the sleeve are sleeved on the distal end portion of the inner needle bar sequentially from the distal end to the proximal end.
  • the inner needle bar extends beyond the outer needle bar, and the spring or the sleeve is sleeved on the inner needle bar and extends beyond the outer needle bar part.
  • the material of the puncture needle includes but not limited to one or more of stainless steel and nickel-titanium alloy.
  • the thickness specification of the puncture needle includes but not limited to: 16G, 17G, 18G, 19G, 20G, 21G.
  • the material of the spring includes but not limited to one or more of stainless steel, nickel-titanium alloy, cobalt-based alloy, and titanium-based alloy.
  • the puncture device includes an interventional catheter device
  • the interventional catheter device includes: a guide tube; a flexible sleeve, the flexible sleeve is set outside the guide tube; the flexible sleeve and the guide tube can move relatively, so that The distal end of the flexible sheath extends beyond the distal end of the guide tube, or the distal end of the guide tube extends beyond the distal end of the flexible sheath.
  • the distal end of the flexible sleeve is provided with a constricted part, the inner diameter of the constricted part is smaller than the outer diameter of the guide tube, and the constricted part is provided with a weakened part that is easy to break, when the intervention catheter Displacement of the guide tube relative to the flexible sheath as the instrument abuts the puncture target breaks the weakened portion such that the guide tube extends beyond the distal end of the flexible sheath.
  • the weakened portion extends to the distal opening of the flexible sheath.
  • the weakened portion extends to the distal opening of the flexible sheath in a linear or helical manner along the longitudinal direction of the flexible sheath.
  • the weakened portion is intermittent scoring lines or indentations.
  • the weakened portion is disposed on the inner surface or the outer surface of the weakened portion.
  • the inner diameter of the constricted part is 0.05mm-1mm smaller than the outer diameter of the guide tube.
  • the material of the flexible sleeve includes but not limited to one or more of polytetrafluoroethylene, fluorinated ethylene propylene copolymer, thermoplastic polyurethane elastomer, nylon 12, block polyetheramide elastomer, high-density polyethylene kind.
  • the material of the guide tube includes but not limited to one or more of stainless steel and nickel-titanium alloy.
  • the thickness specification of the guide tube includes but not limited to: 13G, 14G, 15G, 16G, and the length of the guide tube is 42cm-57cm.
  • the inner diameter of the flexible sleeve is 0.1 mm to 2 mm larger than the outer diameter of the guide tube.
  • the interventional catheter device includes a connecting piece through which the proximal end of the guide tube is connected to the proximal end of the flexible sheath, and the guiding tube and the flexible sheath can be connected through the connecting piece relatively mobile.
  • connection method of the connector is a threaded method, a buckle method or an adhesive method.
  • the puncture instrument of the present invention its flexibility can be effectively improved, and a puncture operation that is easier to operate, more stable, and thus safer and more effective can be realized, thereby solving the technical problems existing in the prior art.
  • Fig. 1 is the schematic diagram of the puncture instrument of the embodiment of the present invention.
  • Fig. 2 is the schematic diagram of the puncture instrument of the embodiment of the present invention.
  • Fig. 3 is the schematic diagram of the puncture needle of the embodiment of the present invention.
  • Fig. 4 is the schematic diagram of the puncture needle of the embodiment of the present invention.
  • Fig. 5 is a schematic diagram of a puncture needle provided with a spring according to an embodiment of the present invention.
  • Fig. 6 is a schematic diagram of a puncture needle provided with a spring according to an embodiment of the present invention.
  • Fig. 7 is a schematic diagram of a puncture needle provided with a spring according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a puncture needle provided with a catheter according to an embodiment of the present invention.
  • Fig. 9 is a schematic diagram of the assembly of the interventional catheter device and the puncture needle according to the embodiment of the present invention.
  • Fig. 10 is a schematic diagram of a guide tube according to an embodiment of the present invention.
  • Fig. 11 is a schematic diagram of a flexible sleeve according to an embodiment of the present invention.
  • Fig. 12 is a schematic diagram of assembly of a guide tube and a flexible sleeve according to an embodiment of the present invention
  • Fig. 13 is a schematic diagram of the state of the guide tube and the flexible sleeve in the process of reaching the intervention target through the intervention approach according to the embodiment of the present invention
  • Fig. 14 is a schematic diagram of the state of the guide tube and the flexible sleeve when performing puncture guidance according to the embodiment of the present invention.
  • Fig. 15 is a schematic diagram of the state of the guide tube and the flexible sleeve in the embodiment of the present invention during the exit process through the interventional approach after the implementation of puncture guidance;
  • Fig. 16 is a schematic diagram of a flexible sleeve formed with a distal constriction according to an embodiment of the present invention
  • Fig. 17 is a schematic diagram of the necking part of the flexible sleeve of the embodiment of the present invention.
  • Fig. 18 is a schematic diagram of the state of the guide tube and the flexible sleeve in the process of reaching the intervention target through the intervention approach according to the embodiment of the present invention
  • Fig. 19 is a schematic diagram of the state of the guide tube and the flexible sleeve when performing puncture guidance according to the embodiment of the present invention.
  • Fig. 20 is a schematic diagram of the state of the guide tube and the flexible sleeve in the embodiment of the present invention during the withdrawal process through the interventional approach after the implementation of puncture guidance;
  • An embodiment of the present invention provides a puncture device applicable to interventional navigation technology.
  • the puncture device can be provided with the above-mentioned sensor. Through the sensor, combined with an ultrasonic imaging device, the puncture device can be positioned and navigated during the puncture operation.
  • Fig. 1 is a schematic diagram of a puncture device according to an embodiment of the present invention.
  • the puncture device 1 may include a puncture needle 11 .
  • the material of the puncture needle 11 may be one or more including but not limited to stainless steel, nickel-titanium alloy and the like.
  • the thickness specifications of the puncture needle 11 may include but not limited to: 16G, 17G, 18G, 19G, 20G, 21G, etc.
  • G is the abbreviation of GAUGE, which is a length measurement about diameter originated in North America unit).
  • the puncture needle 11 can be designed in various lengths, for example, for transjugular intrahepatic portosystemic shunt, its length specification can be 50cm-65cm.
  • the puncture needle 11 may include a needle head 112 and a needle shaft 113 .
  • the needle head 112 and the needle bar 113 can be integrally formed.
  • the needle head 112 and the needle bar 113 can also be assembled and connected separately, for example, the needle head 112 and the needle bar 113 are connected by means of welding or threading.
  • the tip 1121 of the needle 112 may be in the shape of a triangular pyramid, a quadrangular pyramid or a cone.
  • the height of the taper of the needle tip 1121 may be 1mm ⁇ 4mm.
  • the needle bar 113 can be set in a shape with a reduced diameter, and the outer diameter of the distal part of the needle bar 113 is smaller than that of the needle bar 113.
  • Fig. 2 is a schematic diagram of a puncture needle according to an embodiment of the present invention.
  • the outer diameter of the distal portion of the needle shaft 113 is smaller than the outer diameter of the proximal portion of the needle shaft 113 , and there is a step transition between the two outer diameter portions.
  • the above-mentioned reduced and reduced-diameter shape can effectively increase the flexibility and guideability of the needle bar 113 .
  • TIPS transjugular intrahepatic portosystemic shunt
  • the needle bar may be configured to include an inner needle bar and an outer needle bar.
  • the structure of the inner and outer needle bars can effectively reduce the section bending stiffness of the part that needs to be bent, thereby improving its flexibility. Bending stiffness is equal to the product of the modulus of elasticity E and the moment of inertia I of the beam section about the neutral axis.
  • Fig. 3 is a schematic diagram of a puncture needle according to an embodiment of the present invention.
  • the needle bar 113 may include an inner needle bar 1131 and an outer needle bar 1132 , and the outer needle bar 1132 is sheathed outside the inner needle bar 1131 .
  • the outer needle bar 1132 and the inner needle bar 1131 can be connected by means of welding or threading.
  • sealing treatment is required between the inner needle bar 1131 and the outer needle bar 1132, and the sealing treatment method can be welding or bonding.
  • Fig. 4 is a schematic diagram of a puncture needle according to an embodiment of the present invention. As shown in FIG. 4 , at the distal portion of the needle bar 113 , the inner needle bar 1131 extends beyond the outer needle bar 1132 , thereby forming a reduced-diameter needle bar design.
  • TIPS transjugular intrahepatic portosystemic shunt
  • the puncture device of the embodiment of the present invention can effectively reduce the frictional resistance of the puncture device, improve its operational stability, and realize easier, more stable, and therefore safer and more effective puncture operations.
  • the puncture needle can also be configured to include an auxiliary part, which can be a spring or a sleeve .
  • the spring can effectively reduce the contact area between the outer surface of the puncture needle 11 and surrounding substances, thereby reducing its frictional resistance. At the same time, the spring can improve the operational stability of the puncture needle 11 due to its elastic stretching force and the effect of increasing the radial dimension of the puncture needle 11 .
  • the spring can be sleeved on the needle bar, and can be connected with the needle bar by welding.
  • the two ends of the spring can be welded to the needle bar respectively.
  • the sleeve can be selected from a material with a small friction coefficient to reduce frictional resistance, such as polytetrafluoroethylene (PTFE) material.
  • PTFE polytetrafluoroethylene
  • the coefficient of friction of polytetrafluoroethylene (PTFE) is very low, and the coefficient of friction of polytetrafluoroethylene on steel is often quoted as 0.04.
  • the sleeve can also improve the operational stability of the puncture needle 11 due to its elastic stretching force and the effect of increasing the radial dimension of the puncture needle 11 .
  • the sleeve can be sheathed on the needle shaft in a heat-shrinking manner.
  • Fig. 5 is a schematic diagram of a puncture needle provided with a spring according to an embodiment of the present invention.
  • the needle bar 113 can be in the shape of variable diameter, the outer diameter of the distal part of the needle bar 113 is smaller than the outer diameter of the proximal part of the needle bar 113, and the spring 114 is sleeved on the smaller outer diameter of the needle bar 113. the distal portion of the diameter.
  • the spring 114 can be connected with the needle bar 113 by welding.
  • the material of the spring 114 may be one or more of stainless steel, nickel-titanium alloy, cobalt-based alloy, and titanium-based alloy, but not limited to.
  • the size of the spring 114 may be: the diameter of the spring wire is 0.08-0.3 mm, the middle diameter of the spring is 0.5 mm-2.0 mm, and the free length of the spring is 30 mm-200 mm.
  • Fig. 6 is a schematic diagram of a puncture needle provided with a spring according to an embodiment of the present invention.
  • the outer needle bar 1132 may include a distal outer needle bar 11321 and a proximal outer needle bar 11322 .
  • the distal outer needle bar 11321 is sleeved on the far end of the inner needle bar 1131
  • the proximal outer needle bar 11322 is sleeved on the proximal end of the inner needle bar 1131
  • the spring 114 can be connected between the distal outer needle bar 11321 and the proximal outer needle bar 11322, sleeved on the inner needle bar 1131.
  • Fig. 7 is a schematic diagram of a puncture needle provided with a spring according to an embodiment of the present invention.
  • the inner needle bar 1131 can be in a shape of variable diameter, and the outer diameter of the distal end portion of the inner needle bar 1131 is smaller than the outer diameter of the proximal end portion of the inner needle bar 1131 .
  • the outer needle bar 1132 and the spring 114 are sheathed on the distal part of the inner needle bar 1131 sequentially from the distal end to the proximal end.
  • the spring can also be sleeved on the part of the inner needle bar 1131 extending beyond the outer needle bar 1132 in the embodiment of the present invention shown in FIG. 4 .
  • the assembly relationship between the sleeve and the needle bar may be the same as the assembly relationship between the spring and the needle bar, as described above.
  • Fig. 8 is a schematic diagram of a puncture needle provided with a catheter according to an embodiment of the present invention.
  • the puncture device 1 may include a catheter 12 .
  • the catheter 12 can be used to establish a channel to deliver the guide wire; on the other hand, the catheter 12 can protect the outer surface of the puncture needle 11 to prevent thrombus formation and reduce frictional resistance when the puncture needle 11 moves.
  • the catheter 12 can be sheathed outside the puncture needle 11 .
  • the distal end of the catheter 12 can be tip-shaped. After assembly, the distal end of the catheter 12 is located on the proximal side of the conical bottom surface of the needle tip 1121 of the puncture needle 11. The distance between the two is 0-1 mm, forming an interference or transition fit. Preferably a transition fit.
  • the proximal end of the catheter 12 can be threadedly connected to the proximal end of the puncture needle 11 through a connecting piece.
  • catheter technology is widely used in interventional radiology.
  • catheter devices were mostly used to establish channels for interventional surgical devices, and most of them did not have the function of bending and guiding at specific positions (Li Yanhao. Practical Clinical Interventional Diagnosis Diagnosis [M]. Beijing: Science Press, 2012.).
  • the catheter devices clinically used in human blood vessels and organs need to be bent at a certain angle at a specific position after entering the human body, and guide puncture needles, guide wires and other interventional surgical devices after bending.
  • the RUPS-100 puncture assembly plastic catheter device and metal catheter device produced by COOK in the United States have a specific position bending guide structure to realize the corresponding guiding function.
  • the distal end of the catheter device During the intervention process, sometimes in order to achieve guidance for the intervention, it is necessary for the distal end of the catheter device to abut against the intervention target, so that the intervention device passes through the catheter device, extends out of the distal end of the catheter device, and is accurately positioned at the intervention target. Intervene.
  • a flexible sleeve can be provided on the outside of the catheter, and the flexible sleeve extends beyond the distal end of the catheter so that the distal end of the catheter Covered by a flexible sleeve to prevent it from injuring surrounding tissue.
  • the puncture device 1 may include a catheter device 13 .
  • Fig. 9 is a schematic diagram of the assembly of the interventional catheter device and the puncture needle according to the embodiment of the present invention.
  • the catheter device 13 may include a guide tube 131 and a flexible sleeve 132 to provide guidance for the puncture needle 11.
  • the catheter device 13 can be straight or curved, for example, the curved catheter can be used for transjugular intrahepatic puncture.
  • Fig. 10 is a schematic diagram of a guide tube according to an embodiment of the present invention.
  • the material of the guide tube 131 may be one or more of materials including but not limited to stainless steel, nickel-titanium alloy, and the like.
  • the thickness specifications of the guide tube 131 may include but are not limited to: 13G, 14G, 15G, 16G, etc. It is 42cm ⁇ 57cm.
  • the distal end of the guide tube 131 can be inclined blade-shaped, which can be used for puncturing, and can also be used for piercing into the intervention target so as to abut against the intervention target.
  • one or more bends can be formed on the distal side of the guide tube 131 .
  • the distal end of the guide tube 131 is a curved oblique blade, which can be bent by 10° to 80°, for example, 60°, at a distance of 0.5 cm to 12 cm from the tip of the oblique blade.
  • Fig. 11 is a schematic diagram of a flexible sleeve according to an embodiment of the present invention.
  • the material of the flexible sleeve 132 may include but not limited to polytetrafluoroethylene (PTFE), fluorinated ethylene propylene copolymer (FEP), thermoplastic polyurethane elastomer (TPU), nylon 12 (PA12), block One or more of polyetheramide elastomer (Pebax), high-density polyethylene (HDPE), etc.
  • PTFE polytetrafluoroethylene
  • FEP fluorinated ethylene propylene copolymer
  • TPU thermoplastic polyurethane elastomer
  • PA12 nylon 12
  • Pebax polyetheramide elastomer
  • HDPE high-density polyethylene
  • Fig. 12 is a schematic diagram of the assembly of the guide tube and the flexible sleeve according to the embodiment of the present invention.
  • the flexible sleeve 132 can be sleeved on the outside of the guide tube 131 , and its inner diameter can be 0.1 mm to 2 mm larger than the outer diameter of the guide tube 131 .
  • the guide tube 131 and the flexible sheath 132 can move relative to each other, so that the distal end of the guide tube 131 can extend beyond the distal end of the flexible sheath 132, or the distal end of the flexible sheath 132 can extend beyond the distal end of the guide tube 131 (as shown in Figure 12 shown).
  • the proximal end of the flexible sleeve 132 can be connected with the proximal end of the guide tube 131 through the connecting piece 133 in a threaded, buckled or adhesive manner, and the flexible sleeve 132 can be opposite to the guiding tube 132 through the connecting piece 133 move.
  • the flexible sleeve 132 and the proximal end of the guide tube 131 are threadedly connected through the connecting piece 133 .
  • the catheter device 13 including the guide tube 131 and the flexible sheath 132 enters the body to reach the puncture target through the skin or organ cavity.
  • Fig. 13 is a schematic diagram of the state of the guide tube and the flexible sheath passing through the interventional approach to the interventional target according to the embodiment of the present invention.
  • the flexible sleeve 132 is sheathed outside the guide tube 131, and the distal end of the flexible sleeve 132 extends beyond the distal beveled edge of the guide tube 131 by 2 to 3 mm to prevent the distal bevel from Injury to the tissue it passes through.
  • Fig. 14 is a schematic view of the state of the guide tube and the flexible sleeve implementing puncture guidance according to the embodiment of the present invention.
  • Fig. 15 is a schematic diagram of the status of the guide tube and the flexible sleeve in the embodiment of the present invention during the withdrawal process through the interventional approach after the implementation of puncture guidance.
  • the distal end of the flexible sleeve 132 can be necked and formed to form a necked part 1321, and the necked part 1321 can be tapered. After molding, the necked part The inner diameter may be smaller than the outer diameter of the guide tube 131 by 0.05mm ⁇ 1mm.
  • Fig. 16 is a schematic diagram of a flexible sleeve formed with a distal constriction according to an embodiment of the present invention.
  • the flexible sheath 132 Since the inner diameter of the distal end of the flexible sheath 132 is smaller than the outer diameter of the distal end of the guide tube 131, the flexible sheath 132 is affected by the passing tissue, Due to the resistance of the organ, the guide tube 131 will not move proximally relative to the guide tube 131, so that the guide tube 131 will not protrude from the distal end of the flexible sheath 132, thereby injuring the passing tissue.
  • Fig. 17 is a schematic view of the necking part of the flexible sleeve according to the embodiment of the present invention.
  • a weakened portion 13211 that is easy to break can be provided on the constricted portion 1321 of the flexible sleeve 132 , as shown in FIG. 17 .
  • the weakened portion 13211 can extend to the distal opening of the flexible sheath 132 .
  • the weakened portion 13211 may be an intermittent score line or indentation, and may extend in a linear or helical manner along the longitudinal direction of the flexible sheath 132 to its distal opening.
  • the weakened portion 13211 can be disposed on the inner surface or the outer surface of the constricted portion 1321 .
  • the weakened part 13211 When the weakened part 13211 is disposed on the outer surface of the constricted part 1321, a depression may be formed on the outer surface, which will stimulate the blood vessel wall and affect the blood flow, thereby increasing the possibility of thrombus formation. Therefore, preferably, the weakened portion 13211 is disposed on the inner surface of the constricted portion 1321 .
  • the weakened portion 13211 makes it possible for the guide tube 131 to destroy the weakened portion 1321 and stretch out the flexible portion 1321 when a force greater than the above-mentioned resistance is applied and the guide tube 131 is pushed distally relative to the flexible sheath 132 when the catheter instrument 13 abuts against the intervention target point.
  • the distal end of the sleeve 132 is open.
  • the weakened portion 1321 is a longitudinal indentation with a width of 1 mm.
  • Fig. 18 is a schematic diagram of the state of the guide tube and the flexible sheath in the process of reaching the intervention target through the intervention approach according to the embodiment of the present invention;
  • the constricted portion of the flexible sheath 132 extends 2-3 mm beyond the distal beveled edge of the guide tube 131 to prevent the distal beveled edge from injuring the passing tissue.
  • a force greater than the above-mentioned resistance can be applied to push the guide tube 131 distally relative to the flexible sleeve 132, so that the guide tube 131 is damaged and weakened.
  • Part 1321 protrudes from the distal opening of the flexible sheath 132 by 2 to 3 mm.
  • Needle 11 provides a puncture guiding guide. Then the puncture needle 11 can be passed through the catheter instrument 13 to puncture the puncture target.
  • Fig. 19 is a schematic view of the state of the guide tube and the flexible sleeve implementing puncture guidance according to the embodiment of the present invention.
  • the guide tube 131 can be pulled back proximally relative to the flexible sheath 132, so that the distal inclined edge of the guide tube 131 can retract into the distal opening of the flexible sheath 132 3 ⁇ 5mm. Afterwards, the guide tube 131 and the flexible sheath 132 are taken out along the original intervention approach. Since the distal inclined edge of the guide tube 131 has retracted into the distal opening of the flexible sheath 132, no damage will be caused to the passing tissue.
  • Fig. 20 is a schematic view of the state of the guide tube and the flexible sleeve in the embodiment of the present invention during the withdrawal process through the interventional approach after the implementation of puncture guidance.
  • the interventional catheter device of the embodiment of the present invention can not only prevent damage to the surrounding tissue it passes through, but also keep it at the intervention target point in the blood vessel or tissue during the intervention process, and build a stable and reliable guiding structure for the operator to guide Puncture or insert interventional devices.
  • the interventional catheter device has a simple structure and process, low cost, good operability, high efficiency and safety, and can meet the operator's requirements for precise guidance during curved puncture.
  • the puncture device in the embodiment of the present invention is equipped with an auxiliary part, which can effectively reduce the frictional resistance of the puncture device, improve its operational stability, and realize easier to operate, more stable, and thus safer and more effective puncture surgery, thereby solving the problem There are technical problems in the technology.
  • TIPS transjugular intrahepatic portosystemic shunt
  • the puncture device of the embodiment of the present invention can effectively improve its flexibility through the structure of the inner and outer needle rods, and realize easier to operate, more stable, and thus safer and more effective puncture operations.
  • the above-mentioned embodiment has described the puncture device in detail.
  • the present invention includes but is not limited to the above-mentioned implementation, and any content that is transformed on the basis of the above-mentioned embodiment falls within the scope of protection of the present invention.
  • Those skilled in the art can draw inferences based on the content of the foregoing embodiments.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
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  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Robotics (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Surgical Instruments (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

La présente invention concerne un instrument de ponction, qui peut avoir une flexibilité efficacement améliorée et permet d'obtenir une opération de ponction qui est plus facile à mettre en oeuvre et plus stable, et présente donc une sûreté et une efficacité accrues.
PCT/CN2022/108988 2021-07-30 2022-07-29 Instrument de ponction Ceased WO2023006073A1 (fr)

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CN202110869169.0A CN113520549B (zh) 2021-07-30 2021-07-30 穿刺器械
CN202110869169.0 2021-07-30

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WO2023006073A1 true WO2023006073A1 (fr) 2023-02-02

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CN113456990B (zh) * 2021-07-30 2025-04-04 北京迈迪斯医疗技术有限公司 介入导管器械
CN113520549B (zh) * 2021-07-30 2025-02-11 北京迈迪斯医疗技术有限公司 穿刺器械
CN113456190B (zh) * 2021-07-30 2025-02-11 北京迈迪斯医疗技术有限公司 穿刺器械
CN113456191B (zh) * 2021-07-30 2025-02-11 北京迈迪斯医疗技术有限公司 穿刺器械

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