CN109620490B - Claw-shaped bile duct and pancreas stent taking-out instrument - Google Patents
Claw-shaped bile duct and pancreas stent taking-out instrument Download PDFInfo
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- CN109620490B CN109620490B CN201811541466.7A CN201811541466A CN109620490B CN 109620490 B CN109620490 B CN 109620490B CN 201811541466 A CN201811541466 A CN 201811541466A CN 109620490 B CN109620490 B CN 109620490B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2002/9528—Instruments specially adapted for placement or removal of stents or stent-grafts for retrieval of stents
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Abstract
A claw-shaped bile duct and pancreas stent taking-out instrument comprises an outer sheath tube, an extensible multi-claw structure, a chassis and a movable disk, and is characterized in that the multi-claw structure is arranged inside the outer sheath tube; the multi-claw structure is arranged on the chassis, and the foremost end of the multi-claw structure is provided with an annular spring structure; a control structure for controlling the chassis to move is arranged on the chassis, and a movable disc is arranged in front of the chassis; the center of the movable disc is provided with a traction structure, and the traction structure passes through the center of the chassis and extends out of the rear end of the outer sheath tube; the control structure extends out of the outer sheath pipe after passing through the outer sheath pipe; the connection between the multi-claw structure and the chassis is in a rotatable connection mode; the movable disc is provided with a through hole for the multi-claw structure to pass through; each claw of the multi-claw structure inclines outwards from the chassis, and the formed multi-claw structure gradually becomes larger forwards from the chassis; the annular spring structure is arranged at the front end of the claw-shaped structure; the diameter of the inner circle of the annular spring structure in the non-deformation state is smaller than the outer diameter of the support pipe.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a claw-shaped bile duct and pancreas stent taking-out instrument.
Background
The biliary system has the functions of secretion, storage, concentration and bile delivery, and has important regulation effect on bile discharge into duodenum. Malignant biliary tract obstruction caused by benign biliary stenosis secondary to repeated cholangitis or biliary tract operation or malignant tumors such as bile duct cancer, liver cancer, pancreatic cancer and metastatic cancer has high morbidity and seriously affects the life quality of patients.
Implanting biliary stents in stenotic or occluded sites is currently the preferred method for treating biliary obstruction. In the complicated reconstruction of the biliary tract, the application of the biliary tract stent is not ignored, especially, the indwelling biliary tract stent tube is considered under the unsatisfactory reconstruction of the biliary tract, and the biliary tract stent tube not only can play the roles of pressure reduction drainage, support and favorable healing of the biliary tract, but also is convenient for observing the biliary condition, postoperative biliary tract radiography and the like. Researches prove that the stent tube retained through the anastomotic stoma is a very important factor for avoiding biliary complications, can play a role in reducing the biliary complications, and particularly has a remarkable role in complicated and difficult biliary reconstruction. In the process of reconstructing the liver transplantation biliary tract, biliary tract stent tubes are not reserved for patients with good biliary tract conditions, but for some complicated biliary tract reconstruction, different types of biliary tract stent tubes can be selected according to different conditions in the operation, so that healing of the biliary tract is facilitated, and biliary tract complications after the liver transplantation operation are reduced.
After the stent is placed for a period of time, the bile duct obstruction disappears or the biliary tract recovers, the stent needs to be taken out from the placed part, the placed stent often has the problem of migration, so that the stent is difficult to take out.
Technical solutions existing in the prior art are somewhat based on a self-draining manner, such as 201610346785.7 a self-draining bile duct stent; in addition, the hairspring is arranged in a treatment mode, such as 201620595874.0 integrated recyclable biliary duct stent; the technical scheme is that the stent is convenient to take out by improving the conception of the stent, the common catheter stent is generally used in the existing clinical operation, and the technical scheme for setting the taking-out instrument is lacked in the prior art.
The invention provides a claw-shaped bile duct and a pancreas stent taking-out instrument, aiming at the problems of difficult force application and difficult stent taking-out in the prior art.
Disclosure of Invention
The invention provides a claw-shaped bile duct and a pancreas stent removing instrument, aiming at solving the problems of difficult force application and difficult stent removal in the prior art.
A claw-shaped bile duct and pancreas stent taking-out instrument comprises an outer sheath tube, an extensible multi-claw structure, a chassis and a movable disk, and is characterized in that the multi-claw structure is arranged inside the outer sheath tube; the multi-claw structure is arranged on the chassis, and the foremost end of the multi-claw structure is provided with an annular spring structure; a control structure for controlling the chassis to move is arranged on the chassis, and a movable disc is arranged in front of the chassis; the center of the movable disc is provided with a traction structure, and the traction structure passes through the center of the chassis and extends out of the rear end of the outer sheath tube; the control structure extends out of the outer sheath pipe after passing through the outer sheath pipe; the connection between the multi-claw structure and the chassis is in a rotatable connection mode; the movable disc is provided with a through hole for the multi-claw structure to pass through; each claw of the multi-claw structure inclines outwards from the chassis, and the formed multi-claw structure gradually becomes larger forwards from the chassis; the annular spring structure is arranged at the front end of the claw-shaped structure; the diameter of the inner circle of the annular spring structure in the non-deformation state is smaller than the outer diameter of the support pipe. Before use, in order to ensure the minimum three-jaw size, the movable disc is arranged at the position of a three-jaw structure with a larger size, after the movable disc reaches a designated position, the outer sheath tube is withdrawn or the control structure is pushed forwards, so that the multi-jaw structure extends out of the outer sheath tube, the position of the three-jaw structure is controlled by the control structure at the rear end, the three-jaw structure is pulled back by the pulling structure, the size of the three-jaw structure is increased, the front end is expanded, the annular spring forms retraction elastic force, and when the size of the front end is expanded to be larger than the outer diameter of the stent tube; the multi-claw structure is sleeved outside the support tube by controlling the control structure and the traction structure and moving downwards, the traction structure is loosened, and the annular spring at the front end surrounds the multi-claw structure outside the support tube by means of elasticity and pulls the multi-claw structure out.
Further, the multi-claw structure is provided with 3-6 claws.
Further, the multi-jaw structure is preferably provided with 3 jaws, i.e., a three-jaw structure.
Furthermore, the chassis is a circular chassis, the edge of the circular chassis is provided with 3 gaps, the gaps are respectively provided with a connecting structure, the connecting structures are connected with the three-jaw structures, and the three-jaw structures can rotate relatively at the connecting positions; the three-jaw structure realizes the opening and closing of the three jaws through relative rotation.
Furthermore, the connecting structure is a cylindrical connecting column, the connecting column is arranged in the middle of the notch, and the connecting column and the chassis are integrally connected; the cylindrical connecting column is convenient for the three-jaw structure to rotate.
Further, the three-jaw structure comprises a connecting ring, an inclined section and a section with a hook which are integrally connected, the connecting ring is arranged on the periphery of the connecting column, the diameter of the connecting ring is larger than that of the connecting column, and the connecting ring rotates relative to the connecting column by taking the connecting column as a rotating shaft; the hooked section is a structure slightly inclined inwards; the annular spring structure is arranged in front of the hooked section. The arrangement of the hooked section can ensure large holding force when holding.
Further, the main part of slope section and area hook section sets up to the rectangular plate, and the setting up of rectangular plate makes the three-jaw structure have stronger stability and grabs the power of holding.
Further, the control structure on the chassis is arranged as a control rod.
Furthermore, the control rod main body is of a smooth-edged rectangular structure, the free end of the control rod is provided with an L-shaped control rod handle, and the control rod handle extends out of the outer sheath tube; the chassis can be moved by pushing and pulling the control rod, thereby moving the position of the three-jaw structure.
Furthermore, the movable disc is a circular movable disc, 3 oval through holes are formed in the edge of the circular movable disc, three claws of the three-claw structure penetrate through the 3 oval through holes respectively, and the size of each oval through hole is larger than that of the cross section area of the rectangular plate of the three-claw structure; the opening and closing of the three-jaw structure can be controlled by moving the movable disc.
Furthermore, a round drawing hole is formed in the centers of the movable disc and the base plate, a drawing structure is arranged in the drawing hole, one end of the drawing structure is fixed on the movable disc, and the other end of the drawing structure penetrates through the center of the base plate and extends out of the outer sheath pipe; by drawing the traction structure, the movable disc can move, so that the three-jaw structure is opened and closed.
Further, the traction structure is arranged into a traction wire which is tied on the movable disc. The movable disc can be withdrawn backwards by drawing the drawing wire backwards, so that the three-jaw structure is opened, the drawing wire is loosened after the drawing wire reaches the outer side of the support pipe, the support pipe is encircled under the elastic action of the annular spring structure, and the support pipe is taken out.
Or, the pulling structure is a pulling strip; the traction strip is integrally connected with the movable disc, or the parts of the traction strip, which are close to the upper part and the lower part of the movable disc, are provided with plugging sections, and one end of the traction strip, which extends out of the outer sheath tube, is provided with a circular arc traction ring; the traction strip can be fixed on the movable disc by arranging the plugging section, so that the movable disc moves along with the traction strip, and an operator can conveniently pull the traction strip by arranging the traction ring. In the process of taking out the support tube, the traction strip moves forwards, so that the pressure of the front end contact surface can be further ensured, and the slipping risk is reduced.
Furthermore, the plugging section is a cylindrical plugging section, and the diameter of the cylindrical plugging section is larger than that of the traction hole; this arrangement ensures that the pulling strip is firmly secured to the movable plate, thereby ensuring that the pulling strip moves the movable plate.
Further, the annular spring structure is welded with the three-jaw structure; the arrangement can ensure that the three-jaw structure can be opened at a certain angle under the condition of no external force, so that the three-jaw structure can be fully opened by using small force to pull the traction wire.
Furthermore, a positioning structure is arranged on the outer side of the front end of the outer sheath tube, and the positioning structure surrounds the outer side wall of the front end of the outer sheath tube; the positioning structure can fix the position of the outer sheath tube, and prevents the outer sheath tube from moving to cause deviation of action direction.
Further, the positioning structure comprises a positioning air bag, a vent pipe and an inflating structure; the positioning air bag is arranged on the outer side wall of the front end of the outer sheath tube; one end of the vent pipe is integrally connected with the positioning air bag, the other end of the vent pipe extends out of the outer side of the outer sheath pipe, and the positioning air bag is inflated through the inflation structure, so that the outer wall of the inflation bag is attached to the wall of the bile duct, and the purpose of fixing the outer sheath pipe in the middle of the bile duct is achieved.
Further, the inflatable structure is arranged as an inflatable bag, the mouth of the vent pipe extending out of one end of the outer sheath pipe is integrally connected with the inflatable bag, and a switch valve is arranged between the inflatable bag and the vent pipe; the switch valve is arranged to be closed after the inflation is finished, so that the gas in the positioning air bag is prevented from being released, the switch valve is opened after the stent is taken out, the gas in the positioning air bag is released, and then the outer sheath tube is pulled out of the body of the patient.
Furthermore, the outer sheath tube is a cylindrical solid hose, and 3 channels are arranged in the outer sheath tube and comprise a pulling strip channel, a control rod channel and a ventilation tube channel; the arrangement can ensure that the pulling strip and the control rod move and bend synchronously along with the outer sheath pipe, and ensure the control of the front chassis and the movable disc.
Furthermore, a section of hollow tube is arranged at the front end of the outer sheath tube, the length of the hollow tube is not less than the total length of the three-jaw structure part, and the hollow tube can accommodate the three-jaw structure; the three-jaw structure is positioned in the hollow tube before being opened, so that the bile tube is prevented from being scratched.
When the three-jaw inflatable biliary stent is used, the outer sheath tube with the three-jaw structure inside is sent into a patient, the inflatable air bag is extruded after the outer sheath tube reaches the position of the stent, the positioning air bag is expanded to be expanded and tightly attached to the inner wall of a bile duct, so that the position of the outer sheath tube is fixed, then the control rod on the chassis is pushed forwards to enable the three-jaw structure to move out of the outer sheath tube, the movable disc is moved backwards through the backward traction structure to increase the expansion angle of the three-jaw structure, the expansion size of the front end is larger than the outer diameter of the stent and is sleeved outside the stent, the traction structure is released afterwards, the annular spring at the front end tightly attaches the three jaws outside the stent by means of elasticity, and finally the outer sheath tube is pulled.
Compared with the prior art, the technical scheme provided by the invention is designed for the stent taking-out instrument, the technical scheme is ingenious in structure, the stent can be accurately taken out, the instrument manufacturing cost is low, and the instrument can be widely popularized and used clinically.
Drawings
FIG. 1 is a schematic view of the overall structure of a multi-claw structure extending out of an external sheath of a claw-shaped bile duct and pancreas stent extracting instrument according to the present invention;
FIG. 2 is an enlarged partial schematic view of a non-use condition of a claw-shaped bile duct and pancreas stent retrieval device according to the present invention;
FIG. 3 is an enlarged partial cross-sectional view of a portion of a claw-shaped bile duct and pancreas stent retrieval device of the present invention in an unused state;
FIG. 4 is a partially enlarged structural view of a multi-claw structure of a claw-shaped bile duct and pancreas stent retrieval instrument of the present invention extending out of an external sheath;
FIG. 5 is an enlarged partial sectional view of the multiple-jaw-structure extended sheath of the instrument for extracting a claw-shaped bile duct and a pancreatic stent of the present invention;
FIG. 6 is an enlarged structural view of a multi-claw structure with a pulling strip and a control rod of the instrument for extracting a claw-shaped bile duct and a pancreatic stent of the present invention;
FIG. 7 is an enlarged structural view of a multi-claw structure of a claw-shaped bile duct and pancreas stent retrieval device without a pulling strip and a control rod according to the present invention;
FIG. 8 is an enlarged schematic view of the control rod, the pulling strip and the balloon at the control end of the operator of the claw-shaped bile duct and pancreas stent retrieval instrument according to the present invention;
FIG. 9 is a partially enlarged schematic structural view showing a multiple-paw structure in an expanded state when the appliance for removing a paw-shaped bile duct and a pancreatic stent of the present invention is in use;
FIG. 10 is an enlarged schematic view of a multi-jaw configuration of a bile duct and pancreatic stent retrieval device of the present invention in an expanded state.
FIG. 11 is an enlarged partial cross-sectional view of the sheath of the apparatus for removing the claw-shaped bile duct and the pancreatic stent of the present invention;
FIG. 12 is an enlarged schematic view of a base plate of a claw-shaped bile duct and pancreas stent retrieval device of the present invention;
FIG. 13 is an enlarged schematic view of a single claw of a multi-claw structure of a claw-shaped bile duct and pancreas stent retrieval device of the present invention;
FIG. 14 is an enlarged sectional view of the joint between the multi-claw structure and the chassis of the instrument for extracting a claw-shaped bile duct and a pancreatic stent of the present invention.
In the figure, 1, an outer sheath; 11. a draw strip channel; 12. a control rod channel; 13. a vent passageway; 14. a hollow tube; 2. a multi-jaw structure; 21. a connecting ring; 22. an inclined section; 23. a hooked section; 24. an annular spring structure; 3. a chassis; 31. connecting columns; 32. a control lever; 321. an "L" shaped joystick handle; 4. a movable tray; 41. a circular pull hole; 42. an elliptical through hole; 43. pulling the strip; 431. a plugging section; 432. a circular arc traction ring; 5. positioning the air bag; 51. a breather pipe; 52. an air-filled bag; 521. and (4) switching on and off the valve.
Detailed Description
The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
Embodiment 1A claw-shaped bile duct and pancreas stent removing apparatus
A claw-shaped bile duct and pancreas stent taking-out instrument comprises an outer sheath tube 1, an extensible multi-claw structure 2, a chassis 3 and a movable disk 4, and is characterized in that the multi-claw structure 2 is arranged inside the outer sheath tube 1; the multi-claw structure 2 is arranged on the chassis 3, and the most front end of the multi-claw structure 2 is provided with an annular spring structure 24; a control structure for controlling the chassis 3 to move is arranged on the chassis 3, and a movable disk 4 is arranged in front of the chassis 3; a traction structure is arranged in the center of the movable disc 4, penetrates through the center of the chassis 3 and extends out of the rear end of the outer sheath tube 1; the control structure extends out of the outer sheath tube 1 after passing through the outer sheath tube 1; the multi-claw structure 2 and the chassis 3 are connected in a rotatable connection mode; the movable disc 4 is provided with a through hole for the multi-claw structure 2 to pass through; each claw of the multi-claw structure 2 inclines outwards from the chassis 3, and the formed multi-claw structure 2 becomes larger forwards from the chassis 3; the annular spring structure 24 is arranged at the front end of the claw-shaped structure; the diameter of the inner circle of the annular spring structure 24 in the undeformed state is smaller than the outer diameter of the stent tube. Before use, in order to ensure the minimum three-jaw size, the movable disc 4 is arranged at the position of a three-jaw structure with a larger size, after the three-jaw structure reaches a designated position, the multi-jaw structure 2 is extended out of the outer sheath tube 1 by withdrawing the outer sheath tube 1 or pushing the control structure forwards, the position of the three-jaw structure is controlled by the control structure at the rear end, the three-jaw structure is pulled back by the traction structure, the size of the three-jaw structure is enlarged, the front end is expanded, the annular spring forms the retraction elastic force, and when the size of the front end is expanded to be larger than the outer diameter of the stent tube; the multi-claw structure 2 is downwards moved by controlling the control structure and the traction structure, so that the multi-claw structure 2 is sleeved outside the support tube, the traction structure is loosened, and the annular spring at the front end surrounds the multi-claw to the outside of the support by virtue of elasticity and pulls the multi-claw out.
The multi-jaw structure 2 is preferably provided with 3 jaws, i.e. a three-jaw structure.
The chassis 3 is a circular chassis 3, the edge of the circular chassis 3 is provided with 3 gaps, the gaps are respectively provided with a connecting structure, the connecting structures are connected with the three-jaw structures, and the three-jaw structures can rotate relatively at the connecting positions; the three-jaw structure realizes the opening and closing of the three jaws through relative rotation.
The connecting structure is a cylindrical connecting column 31, the connecting column 31 is arranged in the middle of the gap, and the connecting column 31 is integrally connected with the chassis 3; the cylindrical connecting column 31 is arranged to facilitate the rotation of the three-jaw structure.
The three-jaw structure comprises a connecting ring 21, an inclined section 22 and a section with a hook 23 which are integrally connected, wherein the connecting ring 21 is arranged on the periphery of the connecting column 31, the diameter of the connecting ring 21 is larger than that of the connecting column 31, and the connecting ring 21 rotates relative to the connecting column 31 as a rotating shaft; the hooked section 23 is slightly inwardly inclined; an annular spring structure 24 is provided in front of the hooked section 23. This arrangement of the hooked section 23 can ensure a large gripping force at the time of gripping.
The main body of slope section 22 and area hook section 23 sets up to the rectangular plate, and the setting up of rectangular plate makes the three-jaw structure have stronger stability and grabs power.
The control structure on the chassis 3 is provided as a control lever 32.
The main body of the control rod 32 is of a smooth-edged rectangular structure, the free end of the control rod 32 is provided with an L-shaped control rod handle 321, and the control rod 32 handle extends out of the outer side of the sheath tube 1; the chassis 3, and thus the position of the three-jaw structure, can be moved by pushing or pulling the control rod 32.
The movable disc 4 is a circular movable disc 4, 3 oval through holes 42 are formed in the edge of the circular movable disc 4, three claws of the three-claw structure penetrate through the 3 oval through holes 42 respectively, and the size of each oval through hole 42 is larger than that of the cross section area of a rectangular plate of the three-claw structure; the opening and closing of the three-jaw structure can be controlled by moving the movable disc 4.
A round drawing hole 41 is formed in the centers of the movable disc 4 and the base plate 3, a drawing structure is arranged in the drawing hole, one end of the drawing structure is fixed on the movable disc 4, and the other end of the drawing structure penetrates through the center of the base plate 3 and extends out of the outer sheath tube 1; by pulling the pulling structure, the movable disc 4 can be moved, thereby opening and closing the three-jaw structure.
The traction structure is arranged to be a traction wire which is tied on the movable disc 4. The movable disc 4 can be retracted by pulling the pull wire backwards, so that the three-jaw structure is opened, the pull wire is loosened after the movable disc reaches the outer side of the support tube, the support tube is encircled under the elastic force of the annular spring structure 24, and the support tube is taken out.
The annular spring structure 24 is welded with the three-jaw structure; the arrangement can ensure that the three-jaw structure can be opened at a certain angle under the condition of no external force, so that the three-jaw structure can be fully opened by using small force to pull the traction wire.
When the three-jaw traction type external sheath tube is used, the external sheath tube 1 with the three-jaw structure inside is sent into a patient, after the external sheath tube reaches the position of a support, the control rod 32 on the base plate 3 is pushed forwards to enable the three-jaw structure to move to the outside of the external sheath tube 1, then the movable plate 4 is moved backwards through the backward traction structure so as to increase the opening angle of the three-jaw structure, the opening size of the front end is larger than the outer diameter of the support and is sleeved outside the support, the traction structure is released backwards, the annular spring at the front end can cling the three jaws to the outside of the support by means of elasticity, and finally the external sheath tube 1 is pulled out of the patient.
Embodiment 2A claw-shaped bile duct and pancreas stent removing apparatus
A claw-shaped bile duct and pancreas stent taking-out instrument comprises an outer sheath tube 1, an extensible multi-claw structure 2, a chassis 3 and a movable disk 4, and is characterized in that the multi-claw structure 2 is arranged inside the outer sheath tube 1; the multi-claw structure 2 is arranged on the chassis 3, and the most front end of the multi-claw structure 2 is provided with an annular spring structure 24; a control structure for controlling the chassis 3 to move is arranged on the chassis 3, and a movable disk 4 is arranged in front of the chassis 3; a traction structure is arranged in the center of the movable disc 4, penetrates through the center of the chassis 3 and extends out of the rear end of the outer sheath tube 1; the control structure extends out of the outer sheath tube 1 after passing through the outer sheath tube 1; the multi-claw structure 2 and the chassis 3 are connected in a rotatable connection mode; the movable disc 4 is provided with a through hole for the multi-claw structure 2 to pass through; each claw of the multi-claw structure 2 inclines outwards from the chassis 3, and the formed multi-claw structure 2 becomes larger forwards from the chassis 3; the annular spring structure 24 is arranged at the front end of the claw-shaped structure; the diameter of the inner circle of the annular spring structure 24 in the undeformed state is smaller than the outer diameter of the stent tube. Before use, in order to ensure the minimum three-jaw size, the movable disc 4 is arranged at the position of a three-jaw structure with a larger size, after the three-jaw structure reaches a designated position, the multi-jaw structure 2 is extended out of the outer sheath tube 1 by withdrawing the outer sheath tube 1 or pushing the control structure forwards, the position of the three-jaw structure is controlled by the control structure at the rear end, the three-jaw structure is pulled back by the traction structure, the size of the three-jaw structure is enlarged, the front end is expanded, the annular spring forms the retraction elastic force, and when the size of the front end is expanded to be larger than the outer diameter of the stent tube; the multi-claw structure 2 is downwards moved by controlling the control structure and the traction structure, so that the multi-claw structure 2 is sleeved outside the support tube, the traction structure is loosened, and the annular spring at the front end surrounds the multi-claw to the outside of the support by virtue of elasticity and pulls the multi-claw out.
The multi-jaw structure 2 is provided as a three-jaw structure with 3 jaws.
The chassis 3 is a circular chassis 3, the edge of the circular chassis 3 is provided with 3 gaps, the gaps are respectively provided with a connecting structure, the connecting structures are connected with the three-jaw structures, and the three-jaw structures can rotate relatively at the connecting positions; the three-jaw structure realizes the opening and closing of the three jaws through relative rotation.
The connecting structure is a cylindrical connecting column 31, the connecting column 31 is arranged in the middle of the gap, and the connecting column 31 is integrally connected with the chassis 3; the cylindrical connecting column 31 is arranged to facilitate the rotation of the three-jaw structure.
The three-jaw structure comprises a connecting ring 21, an inclined section 22 and a section with a hook 23 which are integrally connected, wherein the connecting ring 21 is arranged on the periphery of the connecting column 31, the diameter of the connecting ring 21 is larger than that of the connecting column 31, and the connecting ring 21 rotates relative to the connecting column 31 as a rotating shaft; the hooked section 23 is slightly inwardly inclined; an annular spring structure 24 is provided in front of the hooked section 23. This arrangement of the hooked section 23 can ensure a large gripping force at the time of gripping.
The main body of slope section 22 and area hook section 23 sets up to the rectangular plate, and the setting up of rectangular plate makes the three-jaw structure have stronger stability and grabs power.
The control structure on the chassis 3 is provided as a control lever 32.
The main body of the control rod 32 is of a smooth-edged rectangular structure, the free end of the control rod 32 is provided with an L-shaped control rod handle 321, and the control rod 32 handle extends out of the outer side of the sheath tube 1; the chassis 3, and thus the position of the three-jaw structure, can be moved by pushing or pulling the control rod 32.
The movable disc 4 is a circular movable disc 4, 3 oval through holes 42 are formed in the edge of the circular movable disc 4, three claws of the three-claw structure penetrate through the 3 oval through holes 42 respectively, and the size of each oval through hole 42 is larger than that of the cross section area of a rectangular plate of the three-claw structure; the opening and closing of the three-jaw structure can be controlled by moving the movable disc 4.
A round drawing hole 41 is formed in the centers of the movable disc 4 and the base plate 3, a drawing structure is arranged in the drawing hole, one end of the drawing structure is fixed on the movable disc 4, and the other end of the drawing structure penetrates through the center of the base plate 3 and extends out of the outer sheath tube 1; by pulling the pulling structure, the movable disc 4 can be moved, thereby opening and closing the three-jaw structure.
The drawing structure is a drawing strip 43; the pulling strip 43 is integrally connected with the movable disk 4, or the portions of the pulling strip 43, which are close to the upper and lower portions of the movable disk 4, are provided with blocking sections 431, and one end of the pulling strip 43, which extends out of the outer sheath tube 1, is provided with a circular arc pulling ring 432; the pulling strip 43 can be fixed on the movable disk 4 by arranging the blocking section 431, so that the movable disk 4 moves along with the pulling strip 43, and the pulling strip is convenient for an operator to pull the pulling strip 43. In the process of taking out the support tube, the traction strip 43 moves forwards, so that the pressure of the front end contact surface can be further ensured, and the slipping risk is reduced.
The plugging section 431 is a cylindrical plugging section 431, and the diameter of the cylindrical plugging section 431 is larger than that of the traction hole; this arrangement ensures that the pulling strip 43 is firmly fixed to the movable tray 4, thereby ensuring that the pulling strip 43 drives the movable tray 4 to move.
The annular spring structure 24 is welded with the three-jaw structure; the arrangement can ensure that the three-jaw structure can be opened at a certain angle under the condition of no external force, so that the three-jaw structure can be fully opened by using small force to pull the traction wire.
A positioning structure is arranged on the outer side of the front end of the outer sheath tube 1, and the positioning structure surrounds the outer side wall of the front end of the outer sheath tube 1; the positioning structure can fix the position of the sheath tube 1, and prevent the sheath tube 1 from moving to cause deviation of action direction.
The positioning structure comprises a positioning air bag 5, a vent pipe 51 and an inflating structure; the positioning air bag 5 is arranged on the outer side wall of the front end of the outer sheath tube 1; one end of the vent pipe 51 is integrally connected with the positioning air bag 5, the other end of the vent pipe 51 extends out of the outer side of the outer sheath pipe 1, and the positioning air bag 5 is inflated through an inflation structure, so that the outer wall of the inflation bag 52 is attached to the wall of the bile duct, and the purpose of fixing the outer sheath pipe 1 in the middle of the bile duct is achieved.
The inflation structure is an inflation bag 52, the opening of the air pipe 51 extending out of one end of the outer sheath tube 1 is integrally connected with the inflation bag 52, and a switch valve 521 is arranged between the inflation bag 52 and the air pipe 51; the switch valve 521 is provided so that the switch valve 521 is closed after the completion of inflation to prevent the gas in the positioning balloon 5 from being released, and the switch valve 521 is opened after the stent is taken out to release the gas in the positioning balloon 5, and then the sheath tube 1 is pulled out of the patient.
When the three-jaw structure is used, the outer sheath tube 1 with the three-jaw structure inside is sent into a patient body, after the position of the stent is reached, the inflatable air bag is extruded, the positioning air bag 5 is expanded and clung to the inner wall of the bile duct, so that the position of the outer sheath tube 1 is fixed, then the control rod 32 on the chassis 3 is pushed forwards to enable the three-jaw structure to move to the outside of the outer sheath tube 1, the movable disc 4 moves backwards by pulling the pulling structure backwards to increase the opening angle of the three-jaw structure, the opening size of the front end is larger than the outer diameter of the stent and is sleeved outside the stent, the pulling structure is released backwards, the annular spring at the front end clings the three jaws to the outside of the stent by virtue of elasticity, and finally the outer sheath tube 1 is pulled out of the.
Embodiment 3A claw-shaped bile duct and pancreas stent removing apparatus
A claw-shaped bile duct and pancreas stent taking-out instrument comprises an outer sheath tube 1, an extensible multi-claw structure 2, a chassis 3 and a movable disk 4, and is characterized in that the multi-claw structure 2 is arranged inside the outer sheath tube 1; the multi-claw structure 2 is arranged on the chassis 3, and the most front end of the multi-claw structure 2 is provided with an annular spring structure 24; a control structure for controlling the chassis 3 to move is arranged on the chassis 3, and a movable disk 4 is arranged in front of the chassis 3; a traction structure is arranged in the center of the movable disc 4, penetrates through the center of the chassis 3 and extends out of the rear end of the outer sheath tube 1; the control structure extends out of the outer sheath tube 1 after passing through the outer sheath tube 1; the multi-claw structure 2 and the chassis 3 are connected in a rotatable connection mode; the movable disc 4 is provided with a through hole for the multi-claw structure 2 to pass through; each claw of the multi-claw structure 2 inclines outwards from the chassis 3, and the formed multi-claw structure 2 becomes larger forwards from the chassis 3; the annular spring structure 24 is arranged at the front end of the claw-shaped structure; the diameter of the inner circle of the annular spring structure 24 in the undeformed state is smaller than the outer diameter of the stent tube. Before use, in order to ensure the minimum three-jaw size, the movable disc 4 is arranged at the position of a three-jaw structure with a larger size, after the three-jaw structure reaches a designated position, the multi-jaw structure 2 is extended out of the outer sheath tube 1 by withdrawing the outer sheath tube 1 or pushing the control structure forwards, the position of the three-jaw structure is controlled by the control structure at the rear end, the three-jaw structure is pulled back by the traction structure, the size of the three-jaw structure is enlarged, the front end is expanded, the annular spring forms the retraction elastic force, and when the size of the front end is expanded to be larger than the outer diameter of the stent tube; the multi-claw structure 2 is downwards moved by controlling the control structure and the traction structure, so that the multi-claw structure 2 is sleeved outside the support tube, the traction structure is loosened, and the annular spring at the front end surrounds the multi-claw to the outside of the support by virtue of elasticity and pulls the multi-claw out.
The multi-jaw structure 2 is provided as a three-jaw structure with 3 jaws.
The chassis 3 is a circular chassis 3, the edge of the circular chassis 3 is provided with 3 gaps, the gaps are respectively provided with a connecting structure, the connecting structures are connected with the three-jaw structures, and the three-jaw structures can rotate relatively at the connecting positions; the three-jaw structure realizes the opening and closing of the three jaws through relative rotation.
The connecting structure is a cylindrical connecting column 31, the connecting column 31 is arranged in the middle of the gap, and the connecting column 31 is integrally connected with the chassis 3; the cylindrical connecting column 31 is arranged to facilitate the rotation of the three-jaw structure.
The three-jaw structure comprises a connecting ring 21, an inclined section 22 and a section with a hook 23 which are integrally connected, wherein the connecting ring 21 is arranged on the periphery of the connecting column 31, the diameter of the connecting ring 21 is larger than that of the connecting column 31, and the connecting ring 21 rotates relative to the connecting column 31 as a rotating shaft; the hooked section 23 is slightly inwardly inclined; an annular spring structure 24 is provided in front of the hooked section 23. This arrangement of the hooked section 23 can ensure a large gripping force at the time of gripping.
The main body of slope section 22 and area hook section 23 sets up to the rectangular plate, and the setting up of rectangular plate makes the three-jaw structure have stronger stability and grabs power.
The control structure on the chassis 3 is provided as a control lever 32.
The main body of the control rod 32 is of a smooth-edged rectangular structure, the free end of the control rod 32 is provided with an L-shaped control rod handle 321, and the control rod 32 handle extends out of the outer side of the sheath tube 1; the chassis 3, and thus the position of the three-jaw structure, can be moved by pushing or pulling the control rod 32.
The movable disc 4 is a circular movable disc 4, 3 oval through holes 42 are formed in the edge of the circular movable disc 4, three claws of the three-claw structure penetrate through the 3 oval through holes 42 respectively, and the size of each oval through hole 42 is larger than that of the cross section area of a rectangular plate of the three-claw structure; the opening and closing of the three-jaw structure can be controlled by moving the movable disc 4.
A round drawing hole 41 is formed in the centers of the movable disc 4 and the base plate 3, a drawing structure is arranged in the drawing hole, one end of the drawing structure is fixed on the movable disc 4, and the other end of the drawing structure penetrates through the center of the base plate 3 and extends out of the outer sheath tube 1; by pulling the pulling structure, the movable disc 4 can be moved, thereby opening and closing the three-jaw structure.
The drawing structure is a drawing strip 43; the pulling strip 43 is integrally connected with the movable disk 4, or the portions of the pulling strip 43, which are close to the upper and lower portions of the movable disk 4, are provided with blocking sections 431, and one end of the pulling strip 43, which extends out of the outer sheath tube 1, is provided with a circular arc pulling ring 432; the pulling strip 43 can be fixed on the movable disk 4 by arranging the blocking section 431, so that the movable disk 4 moves along with the pulling strip 43, and the pulling strip is convenient for an operator to pull the pulling strip 43. In the process of taking out the support tube, the traction strip 43 moves forwards, so that the pressure of the front end contact surface can be further ensured, and the slipping risk is reduced.
The plugging section 431 is a cylindrical plugging section 431, and the diameter of the cylindrical plugging section 431 is larger than that of the traction hole; this arrangement ensures that the pulling strip 43 is firmly fixed to the movable tray 4, thereby ensuring that the pulling strip 43 drives the movable tray 4 to move.
The annular spring structure 24 is welded with the three-jaw structure; the arrangement can ensure that the three-jaw structure can be opened at a certain angle under the condition of no external force, so that the three-jaw structure can be fully opened by using small force to pull the traction wire.
A positioning structure is arranged on the outer side of the front end of the outer sheath tube 1, and the positioning structure surrounds the outer side wall of the front end of the outer sheath tube 1; the positioning structure can fix the position of the sheath tube 1, and prevent the sheath tube 1 from moving to cause deviation of action direction.
The positioning structure comprises a positioning air bag 5, a vent pipe 51 and an inflating structure; the positioning air bag 5 is arranged on the outer side wall of the front end of the outer sheath tube 1; one end of the vent pipe 51 is integrally connected with the positioning air bag 5, the other end of the vent pipe 51 extends out of the outer side of the outer sheath pipe 1, and the positioning air bag 5 is inflated through an inflation structure, so that the outer wall of the inflation bag 52 is attached to the wall of the bile duct, and the purpose of fixing the outer sheath pipe 1 in the middle of the bile duct is achieved.
The inflation structure is an inflation bag 52, the opening of the air pipe 51 extending out of one end of the outer sheath tube 1 is integrally connected with the inflation bag 52, and a switch valve 521 is arranged between the inflation bag 52 and the air pipe 51; the switch valve 521 is provided so that the switch valve 521 is closed after the completion of inflation to prevent the gas in the positioning balloon 5 from being released, and the switch valve 521 is opened after the stent is taken out to release the gas in the positioning balloon 5, and then the sheath tube 1 is pulled out of the patient.
The sheath tube 1 is a cylindrical solid hose, and 3 channels are arranged in the sheath tube 1 and comprise a pulling strip 43 channel 11, a control rod 32 channel 12 and a vent pipe 51 channel 13; this arrangement ensures that the drag link 43 and the control rod 32 move and bend synchronously with the sheath tube 1, and ensures control of the front chassis 3 and the movable disk 4.
A section of hollow tube 14 is arranged at the front end of the external sheath tube 1, the length of the hollow tube 14 is not less than the total length of the three-jaw structure part, and the hollow tube 14 can accommodate the three-jaw structure; the three-jaw structure is positioned within the hollow tube 14 prior to opening to avoid scratching the bile duct.
When the three-jaw structure pulling device is used, the outer sheath tube 1 with the three-jaw structure inside is sent into a patient body, after the position of a support is reached, the inflatable air bag is extruded, the positioning air bag 5 is expanded and clung to the inner wall of a bile duct, so that the position of the outer sheath tube 1 is fixed, then the control rod 32 on the chassis 3 is pushed forwards to enable the three-jaw structure to move from the inside of the hollow tube 14 to the outside of the outer sheath tube 1, then the movable disc 4 moves backwards by pulling the pulling structure backwards to increase the opening angle of the three-jaw structure, the opening size of the front end is larger than the outer diameter of the support and is sleeved outside the support, the pulling structure is loosened backwards, the annular spring at the front end clings the three jaws to the outside of the support by means of elasticity, and finally the outer.
The above description of the embodiments is only for the understanding of the present invention. It should be noted that modifications could be made to the invention without departing from the principle of the invention, which would also fall within the scope of the claims of the invention.
Claims (11)
1. A claw-shaped bile duct and pancreas stent taking-out instrument comprises an outer sheath tube (1), an extensible multi-claw structure (2), a chassis (3) and a movable disc (4), and is characterized in that the multi-claw structure (2) is arranged inside the outer sheath tube (1); the multi-claw structure (2) is arranged on the chassis (3), and the foremost end of the multi-claw structure (2) is provided with an annular spring structure (24); a control structure for controlling the chassis (3) to move is arranged on the chassis (3), the control structure is arranged as a control rod (32), the main body of the control rod (32) is arranged as a rectangular structure with smooth edges, and a movable disc (4) is arranged in front of the chassis (3); a traction structure is arranged in the center of the movable disc (4), penetrates through the center of the chassis (3) and extends out of the rear end of the outer sheath tube (1); the control structure extends out of the outer sheath tube (1) after passing through the outer sheath tube (1); the connection between the multi-claw structure (2) and the chassis (3) is in a rotatable connection mode; the movable disc (4) is provided with a through hole for the multi-claw structure (2) to pass through; each claw of the multi-claw structure (2) inclines outwards from the chassis (3), and the formed multi-claw structure (2) is gradually enlarged forwards from the chassis (3); the annular spring structure (24) is arranged at the front end of the claw-shaped structure; the diameter of the inner circle of the annular spring structure (24) in a non-deformation state is smaller than the outer diameter of the support pipe.
2. The claw bile duct and pancreas stent retrieval device of claim 1, wherein the multi-claw structure (2) provides 3-6 claws.
3. The claw-shaped bile duct and pancreas stent retrieval device according to claim 2, wherein the multi-claw structure (2) is preferably provided with 3 claws, i.e. a three-claw structure.
4. The claw-shaped bile duct and pancreas stent removing apparatus according to claim 1, wherein the chassis (3) is configured as a circular chassis (3), the edge of the circular chassis (3) is provided with 3 gaps, and a connecting structure is respectively arranged in the gaps.
5. The claw-shaped bile duct and pancreas stent extraction instrument according to claim 4, wherein the connection structure is provided as a cylindrical connection column (31), the connection column (31) is provided at a middle position of the gap, and the connection column (31) is integrally connected with the chassis (3).
6. The claw-shaped bile duct and pancreas stent removal instrument according to claim 3, wherein the movable disk (4) is provided as a circular movable disk (4), the edge of the circular movable disk (4) is provided with 3 oval through holes (42), the three claws of the three-claw structure pass through the 3 oval through holes (42), respectively, and the size of the oval through holes (42) is larger than the size of the cross-sectional area of the rectangular plate of the three-claw structure.
7. The device for removing the talus bile duct and pancreatic stent as claimed in claim 6, wherein the movable disk (4) and the bottom disk (3) are provided with a circular pulling hole (41) at the center, a pulling structure is arranged in the pulling hole, one end of the pulling structure is fixed on the movable disk (4), and the other end of the pulling structure passes through the center of the bottom disk (3) and extends out of the sheath tube (1).
8. The claw-shaped bile duct and pancreas stent removing apparatus as claimed in claim 1, wherein a positioning structure is provided outside the front end of the external sheath tube (1), the positioning structure surrounding the outer side wall of the front end of the external sheath tube (1).
9. The claw bile duct and pancreas stent retrieval instrument of claim 8, wherein the positioning structure comprises a positioning balloon (5), a ventilation tube (51), an inflation structure; the positioning air bag (5) is arranged on the outer side wall of the front end of the sheath tube (1); one end of the vent pipe (51) is integrally connected with the positioning air bag (5), and the other end of the vent pipe (51) extends out of the outer side of the outer sheath pipe (1).
10. The claw-shaped bile duct and pancreas stent removal instrument according to any one of claims 1 to 9, wherein the sheath tube (1) is provided as a cylindrical solid tube, and 3 passages are provided in the sheath tube (1) including a pull strip (43) passage (11), a control rod (32) passage (12) and a ventilation tube (51) passage (13).
11. The claw-shaped bile duct and pancreas stent removing apparatus as claimed in claim 3, wherein the front end of the sheath tube (1) is provided with a section of hollow tube (14), the length of the hollow tube (14) is not less than the total length of the three-claw structure part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541466.7A CN109620490B (en) | 2018-12-17 | 2018-12-17 | Claw-shaped bile duct and pancreas stent taking-out instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541466.7A CN109620490B (en) | 2018-12-17 | 2018-12-17 | Claw-shaped bile duct and pancreas stent taking-out instrument |
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| Publication Number | Publication Date |
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| CN109620490A CN109620490A (en) | 2019-04-16 |
| CN109620490B true CN109620490B (en) | 2020-08-14 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6551303B1 (en) * | 1999-10-27 | 2003-04-22 | Atritech, Inc. | Barrier device for ostium of left atrial appendage |
| US20020143387A1 (en) * | 2001-03-27 | 2002-10-03 | Soetikno Roy M. | Stent repositioning and removal |
| US7025791B2 (en) * | 2002-12-02 | 2006-04-11 | Gi Dynamics, Inc. | Bariatric sleeve |
| US8187284B2 (en) * | 2007-04-23 | 2012-05-29 | Boston Scientific Scimed, Inc. | Intraluminary stent relocating apparatus |
| CN204971452U (en) * | 2015-08-20 | 2016-01-20 | 兰州大学第一医院 | Stone basket is got to dribbling bag integral type |
| CN205268236U (en) * | 2015-10-22 | 2016-06-01 | 常州乐奥医疗科技有限公司 | Novel calculus extraction basket |
| CN209361004U (en) * | 2018-12-17 | 2019-09-10 | 中国医学科学院北京协和医院 | It is a kind of for bile duct and the claw type bracket removal equipment of pancreas |
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