32 results about "Direct puncture" patented technology

A hemodialysis and vascular access system comprises a subcutaneous composite PTFE silastic arteriovenous fistula having an indwelling silastic venous end which is inserted percutaneously into a vein and a PTFE arterial end which is anastomosed to an artery. Access to a blood stream within the system is gained by direct puncture of needle(s) into a needle receiving site having a tubular passage within a metal or plastic frame and a silicone upper surface through which needle(s) are inserted. In an alternate embodiment of the invention, percutaneous access to a blood stream may be gained by placing needles directly into the system (i.e. into the PTFE arterial end). The invention also proposes an additional embodiment having an arterialized indwelling venous catheter where blood flows from an artery through a tube and a port into an arterial reservoir and is returned to a vein via a port and a venous outlet tube distinct and distant from the area where the blood from the artery enters the arterial reservoir. The site where blood is returned to the vein is not directly fixed to the venous wall but is free floating within the vein. This system provides a hemodialysis and venous access graft which has superior longevity and performance, is easier to implant and is much more user friendly.

A hemodialysis and vascular access system comprises a subcutaneous composite PTFE silastic arteriovenous fistula having an indwelling silastic venous end which is inserted percutaneously into a vein and a PTFE arterial end which is anastomosed to an artery. Access to a blood stream within the system is gained by direct puncture of needle(s) into a needle receiving site having a tubular passage within a metal or plastic frame and a silicone upper surface through which needle(s) are inserted. In an alternate embodiment of the invention, percutaneous access to a blood stream may be gained by placing needles directly into the system (i.e. into the PTFE arterial end). The invention also proposes an additional embodiment having an arterialized indwelling venous catheter where blood flows from an artery through a tube and a port into an arterial reservoir and is returned to a vein via a port and a venous outlet tube distinct and distant from the area where the blood from the artery enters the arterial reservoir. The site where blood is returned to the vein is not directly fixed to the venous wall but is free floating within the vein. This system provides a hemodialysis and venous access graft which has superior longevity and performance, is easier to implant and is much more user friendly.

The present invention relates to a microwave radiation antenna capable of making percutaneous puncture to cure tumor of several regions of human body. Said invention is formed from antenna connector, hard coaxial line, ceramic tube, water inlet tube, water outlet tube, temperature-measuring system, stainless steel sleeve and handle. Its output power can be up to above 100w, and is therapeutic effect is reliable and safe.

The invention discloses a membrane rupture device. The device comprises a cylinder body, a mounting cavity is formed in the cylinder body, and a suction cup is arranged at an opening of the right endof the mounting cavity and is of a conical structure; a light reflection layer is arranged on the inner wall of the suction cup, a retractable rod is arranged in the cylinder body, and a puncture mechanism is arranged at the right end of the retractable rod; a guide sleeve slidingly sleeves the outer side of the retractable rod and is fixedly connected with the inner wall of the mounting cavity through a positioning rod, and a rotation limit mechanism is arranged between the guide sleeve and the retractable rod and comprises a limit groove formed in the inner wall of the guide sleeve and a limit protrusion located at the outer side of the retractable rod; a transmission screw hole is formed in the left end of the retractable rod. The membrane rupture device is simple and reasonable in structure, through a rotation motor, a puncture needle can pierce into through a rotation mode, and the puncture effect is improved. By adopting a mode that part of membrane is sucked in an auxiliary extrusion cylinder for puncture, the hidden safety dangers during direct puncture are avoided, the safety of the device is improved, and the practicability is high.

The invention discloses a femoral artery direct puncture needle, comprising an integrated cylindrical needle body and needle handle, a separation wall is arranged in the inner channel, the inner channel is axially divided into a left channel and a right channel which are independent, the port of the left channel is an inclined left contrast channel outlet, a left contrast channel is arranged at the needle handle part of the left channel, the port of the right channel is a right contrast channel outlet which is in backward direction with the left contrast channel outlet, a right contrast channel is arranged at the needle handle part of the right channel, the left channel and the right channel are provided with an unidirectional haemostasis valve respectively, the ports of the right contrast channel and the left contrast channel are respectively provided with a heparin cap. When the puncture needle is used for the intervention treatment, even though the puncture needle enters the femoral artery, the seal wire is ensured to enter the target blood vessel, the invention solves the problem that the puncture is done again because the seal wire enters the femoral artery after radiography, even the operation is failure and the patient feels the pain.

The invention provides minimally invasive brain stereotactic operation equipment capable of reducing risk of a patient. In a brain operation, a damage free positioning frame, a gun-shaped skull drill suite, a positioning rule, a positioning block series, a puncture transplant injection needle, a limiting stopper and a spiral brain biopsy needle are used, the brain CT or MRL is unnecessary to be repeatedly made, and the puncture thickness is necessarily measured by a ruler; and according to the designed geometric space coordinate of the equipment, a target point can be reached by direct puncture, so the equipment has the advantages of convenience and flexibility, and reduces risk and cost of the patient.

The invention relates to a cannula assembly provided with an air bag and used for direct puncture. The cannula assembly comprises a first sealing assembly and a second sealing assembly, the second sealing assembly comprises a lower shell and a hollow cannula which is connected with the lower shell and extends to the far end, the first sealing assembly, the second sealing assembly and the hollow cannula comprise instrument channels which are communicated and generally aligned, and the hollow cannula comprises an inner column surface, an outer column surface and a cannula wall between the inner column surface and the outer column surface; the far end of the hollow cannula further comprises an open cannula lip, the cannula lip comprises an inclined column surface between an open lip part and a transition lip part, and the inner column surface and the inclined column surface define a cannula inclined wall; an air bag assembly comprises an air bag axis, an air bag lip and an air bag body connected with the air bag lip, and the air bag lip extends towards the far end to form an air bag inclined wall matched with the cannula inclined wall in shape and size; the air bag lip extends towards the near end to be connected with the air bag body and is in smooth transition; an included angle formed between the air bag plane of the air bag body and the air bag axis is an acute angle.

The present invention discloses a trocar-guided disposable central venous puncture needle. The trocar-guided disposable central venous puncture needle comprises a puncture needle core, a Y-shaped sleeve tube and a heparin cap, the puncture needle core is attached to the inner wall of the Y-shaped sleeve tube, the bottom end of the puncture needle core is provided with a transparent tube cavity capable of enabling blood to flow back, the bottom end of the transparent tube cavity communicates with the detachable heparin cap or a disposable injector, a guide wire channel is arranged on the side of the bottom seat of the Y-shaped sleeve tube, and the guide wire channel is connected with a guide wire booster. The present invention relates to the technical field of medical devices. The trocar-guided disposable central venous puncture needle is reasonable in design, easy in operation, high in security, greatly improves a success rate of puncture through the structure cooperation of the Y-shaped sleeve tube, avoids failure of guide wire placement due to body movement of patients and improper fixing by operators, reduces the technical difficulties of the operators, simultaneously, reduces vascular endothelial injury and direct puncture of blood vessels caused by sharp terminals of steel needles, and reduces injury and risks of patients.

The invention discloses a bile duct puncturing needle, comprising an injection part and a guiding part, wherein the injection part comprises a luer joint and a draft tube, the near end of the draft tube is connected with the luer joint, and the remote end of the draft tube is provided with a needle tube; the guiding part comprises a guide tube hollowly sheathed outside the draft tube, the near end of the guide tube is connected with a handheld guiding member, and the remote end of the guide tube can shield the remote end of the draft tube; the interior of the draft tube is provided with a guide wire in a penetrating way, the near end of the guide wire penetrates out of the guiding member, the remote end of the guide wire can penetrate out of the needle tube, wherein the guide tube and the draft tube are flexible hoses, and the needle tube is a metal tube with a puncturing needlepoint. As the technical scheme is adopted, the direct puncture of the bile duct can be realized and the guide wire is placed in the bile duct, thus avoiding passing through the ampulla of the duodenum to cause pancreatitis.

The invention discloses a femoral artery direct puncture needle, comprising an integrated cylindrical needle body and needle handle, a separation wall is arranged in the inner channel, the inner channel is axially divided into a left channel and a right channel which are independent, the port of the left channel is an inclined left contrast channel outlet, a left contrast channel is arranged at the needle handle part of the left channel, the port of the right channel is a right contrast channel outlet which is in backward direction with the left contrast channel outlet, a right contrast channel is arranged at the needle handle part of the right channel, the left channel and the right channel are provided with an unidirectional haemostasis valve respectively, the ports of the right contrast channel and the left contrast channel are respectively provided with a heparin cap. When the puncture needle is used for the intervention treatment, even though the puncture needle enters the femoral artery, the seal wire is ensured to enter the target blood vessel, the invention solves the problem that the puncture is done again because the seal wire enters the femoral artery after radiography,even the operation is failure and the patient feels the pain.

The invention provides a splitting reducing microwave needle. The splitting reducing microwave needle comprises a puncture needle core, a reducing taper head is arranged at the rear outer ring of thehead end of the puncture needle core and comprises a reducing taper head head end and a reducing taper head tail end, the diameters from the reducing taper head head end to the reducing taper head tail end are gradually increased, and a sleeve is arranged inside the tail end of the puncture needle core. In an operation, the splitting reducing microwave needle can directly puncture the skin of a patient, and directly enters a focus position; hemorrhage is reduced, and the postoperative healing time is shortened, which is beneficial to postoperative recovery of the patient.

The invention provides a sacrum nerve puncture path simulation planning system and device, and relates to puncture operation simulation. The sacrum nerve puncture path simulation planning system comprises an image obtaining module and a path simulation planning module, and the image obtaining module is configured to obtain scanning images of sacrum, sacral foramen and a positioning grid located at a lumbosacral part; and the path simulation planning module is configured to establish a three-dimensional model of the sacrum, the sacral foramen and the positioning grid according to the scanned image, and acquire a virtual puncture path penetrating through the positioning grid to reach a sacrum set position and an intersection point of the positioning grid and the virtual puncture path according to the three-dimensional model. The problems that at present, sacral nerve holes are directly punctured for many times, and pain of patients is large are solved. By acquiring the scanning images of the positioning grid, sacrum and sacral foramen, taking the positioning grid as a positioning reference, reconstructing the three-dimensional model of the sacrum, the sacral foramen and the positioning grid, taking a reference of penetrating through the positioning grid to reach a sacrum set position, and establishing a plurality of virtual puncture paths, a human organ state and an actual puncture process are simulated.

The invention provides a percutaneous transhepatic gallbladder direct puncture drainage tube, and belongs to the technical field of medical device manufacturing. The direct puncture drainage tube includes a drainage tube body 1, a supporting tube 2 and a needle core 14; the supporting tube 2 is placed in the drainage tube body 1, the needle core 14 is placed in the supporting tube 2, and the tailpart of the drainage tube body 1 and the tail part of the needle core 14 are connected to the tail part of the supporting tube 2; and a channel in a tapered tube 3 located on the top of the drainage tube body 1 is tapered, the concave part of the outer surface of a concave tube 4 located on the upper part of the drainage tube body 1 is provided with a balloon 5, a water injection channel 6 arranged in the balloon 5 is connected with a connector 7 arranged at the tail part of the drainage tube body 1, and the part, located between the tapered tube 3 and the concave tube 4, of the drainage tubebody 1 is provided with a side hole 8. The drainage tube achieves the beneficial effects of less damage, fewer complications, simple operation, a simplified operation process, and saved operation timeand medical costs.

The invention belongs to the technical field of medical equipment, and specifically relates to a puncture device for abdominal cavity operation in gastrointestinal surgery. The device comprises a support plate, a sleeve, and a puncture rod; a mounting groove is arranged in the middle of the support plate; adjustment rotor blocks are evenly arranged inside the mounting groove; the same sleeve is inthreaded connection among the adjustment rotor blocks together; a stepped mounting hole is arranged inside thee sleeve; a rotating block is fixed connected to the inside of the stepped mounting hole;an adjustment hole is arranged inside the rotating block; and the same puncture rod is inserted between the stepped mounting hole and the adjustment hole. According to the present invention, the support-type abdominal puncture operation is effectively realized by the device, the problems that in the direct puncture process, doctors need to sense whether is in place through the sense of vacuum failure, and the puncture technique difficulty and the operation risk are high, are solved, slow puncture operation is realized through a progressive spiral structure, the structure is simple, and the risk of puncture is greatly reduced.

The invention provides a method for remaining PICC catheter through a jugular vein by virtue of a double-channel technique. The method comprises the following steps: after jugular vein puncture is successfully carried out through ultrasonic guidance and the catheter is fed to a length of a preset pipe, establishing a subcutaneous tunnel with a length of 1cm at the same level of a puncture point byvirtue of a tunnel puncture needle, establishing a relatively long subcutaneous tunnel from an outside end of the subcutaneous tunnel to a site which is far from the lower part of a midclavicular line by two cross fingers, enabling the puncture to penetrate into the two tunnels and penetrate out of a body surface outlet in the site, trimming the catheter, and fixing the catheter at a wall of thechest. According to the method, various difficult problems of a current manner of directly remaining the PICC catheter through direct puncture through the jugular vein are solved, the operation quality is high, complications of a patient with the catheter can be reduced, the life quality is improved, and the method is capable of remarkably reliving the physiological, mental and economic burdens ofthe patient and the working intensity of medical workers and increasing the satisfaction degree of the patient.

This application discloses a cannula comprising balloon for the direct puncture technique, which includes the first and the second seal assembly, which includes the lower outer casing and the hollow sleeve connected thereto and extending to the distal end. The first seal assembly, the second seal assembly and the hollow sleeve include an instrument access that is communicated and substantially aligned; the hollow sleeve including an inner cylinder surface, an outer cylinder surface and a sleeve-wall therebetween; the distal end of the hollow sleeve further includes an open sleeve lip including a slanted cylinder surface between the opening lip and the transitional lip, the inner and the slanted cylinder surface limiting the sleeve slanted-wall; the balloon assembly includes a balloon axis, a balloon lip and a balloon body coupled thereto, the balloon lip extending distally to form the balloon slanted-wall that matches the shape and size of the sleeve slanted-wall.

The invention discloses a vertebral pedicle positioner for spinal column posterior approach minimally-invasive screw fixation. The vertebral pedicle positioner comprises a pair of same metal ring bodies, wherein fluoroscopy rays can not penetrate through the metal ring bodies. The metal ring bodies are fixedly connected through a connecting part and located in the same plane. When the positioner is transversely arranged on the back of a patient for fluoroscopy, drop shadows of vertebral pedicles on two sides are positioned in the metal ring bodies at the same time through fine adjustment of the positioner. The vertebral pedicle positioner for the spinal column posterior approach minimally-invasive screw fixation has the advantages that the vertebral pedicles can be accurately and easily positioned on a body surface, a small surgical incision is accurately selected, and therefore a surgical operation portion can be achieved through division of a gap between multifidus muscle and longissimus muscle under direct vision under the condition that the length of the incision is the same as that of an incision in the prior spinal column minimally invasive technology; the situation that the muscle is injured due to the fact that a surgical approach is conducted in the muscle because of percutaneous direct puncture is avoided, and a vertebral pedicle screw fixation portion and a vertebral plate can be easily found for the screw fixation and decompression; and the positioner is easy and convenient to operate, fast, time-saving and capable of preventing excessive rays from being exposed.

The invention discloses a windowing covered stent and belongs to the field of medical instruments. The windowing covered stent is composed of two support units, each support unit is composed of a metal support, a covering membrane coated on the surface of the metal support, and a metal naked support connected with the top end of the metal support, the near end of each support unit is provided with a windowing area, and at least one membrane is arranged on the periphery below each windowing area. The windowing covered stent has the advantages that the two covering membrane support units which are adjustable in position are adopted, so that the windowing covered stent is simple in surgical operation, easy to release, supportive of direct puncture, little in trauma, less prone to displacement, quite high in surgery success rate, less in suffering of patients, reliable in effect and capable of better protecting renal artery; the windowing covered stent has high wall adhesiveness with blood vessels, seam or gaps generated at part of positions between the stent and the blood vessels are avoided effectively, and internal leakage occurrence rate is lowered.

The utility model discloses a metal stent drainage tube for percutaneous transhepatic duct puncture, and belongs to the technical field of medical instrument manufacturing. The device comprises a drainage tube, an outer sleeve, an inner sleeve, a puncture needle, a drainage tube connector and a dressing patch. The drainage tube is divided into a head part and a body part, and the head part is a metal stent woven by titanium alloy wires; the outer sleeve comprises a head, a body, a tail and a connecting wire, wherein the head is conical, an opening is formed in the head end, and a connecting wire passing hole is formed in the tail; threads are arranged on the surface of the tail end of the inner sleeve; the puncture needle is a metal needle, a plastic resistance block is arranged at the head end, a cap-shaped connector is arranged at the tail end, and threads are arranged on the inner wall of the cap-shaped connector for screwing the puncture needle at the tail end of the inner sleeve;the connector comprises an inner core and a cap, threads are arranged on the surface of the inner core, threads are arranged on the inner wall of the cap, and the cap is screwed on the inner core; thedressing patch is an annular non-woven fabric patch, and a cap-shaped structure is arranged in the middle of the dressing patch. The metal stent drainage tube has the advantages that the metal stentdrainage tube can be directly punctured into an intrahepatic bile duct, the metal stent is retained for supporting stenosis, and the metal stent can be taken out subcutaneously after the stenosis is removed.

The invention relates to a direct puncture type fistula stage-by-stage expansion type drainage tube, and belongs to the technical field of medical appliance manufacturing. The direct puncture type fistula stage-by-stage expansion type drainage tube comprises a drainage tube, a support tube and a needle core which are connected through tail parts; the drainage tube is divided into a head part, a body part, a tail part and a connecting head; the head part is a single-channel loop tube; a side hole is formed in the pipe wall of the head part; a traction line connected with the outer side of the pipe wall of the front end enters a channel 7 through a through hole in the tail end wall of the head part, passes through a channel 10 and a channel 13, and is led out from a through hole in the tailend pipe wall of the tail part; the body part comprises the channel 10 and the channel 11; the channel 10 communicates with the channel 7; the body is in a concave shape and is wrapped with a cylindrical balloon membrane; a cylindrical balloon membrane cavity is internally provided with a through hole and communicates with the channel 11; the tail part of the cylindrical balloon membrane cavity comprises a channel 13 and a channel 14; the channel 13 communicates with the channel 10; the channel 14 communicates with the channel 11; the connecting head is provided with a connector 15 and a connector 16; the connector 15 communicates with the channel 13; the connector 16 communicates with the channel 14; and the outer wall of the connecting head is provided with a traction line slot. The direct puncture type fistula stage-by-stage expansion type drainage tube has the advantages of less damage, less complication and simple operation.

The invention discloses a puncture type laparoscope auxiliary traction device. The technical scheme of the invention has the key points that the puncture type laparoscope auxiliary traction device comprises a supporting part; the supporting part is provided with a grasping device, a driving device and a puncture part; the puncture part is provided with a protection device; the grasping device comprises a grasping part and an adjusting part; the grasping part comprises a first grasping rod; the first grasping rod is rotationally connected with a second grasping rod; the first grasping rod is provided with a first clamping end; and the second grasping rod is provided with a second clamping end. The puncture type laparoscope auxiliary traction device has the following beneficial effects that a doctor uses the puncture part on the supporting part to penetrate through the skin and then drives the driving device on the supporting part to drive the grasping device, so that the grasping device moves back and forth in the puncture part, and then traction of the grasping device, which is required by an operation in an abdominal cavity, is implemented; direct puncture can be implemented; an additional laparoscope cannula does not need to be additionally utilized to establish a passage; and the protection device is mounted on the periphery of the puncture part so as to avoid the case that the puncture part accidentally injuries other tissues in the abdominal cavity when the grasping device works, and improve the treatment effect of an operation.

The invention belongs to the technical field of medical equipment, and specifically relates to a puncture device for abdominal surgery in gastrointestinal surgery, which includes a support plate, a sleeve and a puncture rod; a mounting groove is opened in the middle of the support plate; There are uniformly arranged adjusting turning blocks; the same sleeve is threadedly connected between the adjusting turning blocks; a stepped installation hole is opened inside the sleeve; a rotating block is fixedly connected to the inside of the stepped installing hole; There is an adjustment hole inside the rotating block; the same puncture rod is inserted between the ladder installation hole and the adjustment hole; the invention effectively realizes the supporting abdominal puncture operation, and solves the problem of direct puncture. Doctors need to judge whether the puncture is in place through the sense of vacuum. The puncture technique is difficult and the operation risk is high. Through the progressive spiral structure, the slow puncture operation is realized. The structure is simple and the risk of puncture is greatly reduced.

The invention discloses a direct puncture type fistula step-by-step expansion drainage tube with balloons, and belongs to the technical field of medical equipment manufacture. The direct puncture typefistula expansion drainage tube comprises a drainage tube, a support tube and a needle core; the head of the drainage tube is conical, a spherical air bag and a cylindrical air bag are arranged, a connection head is arranged at the end of an inner water injection passage, and side holes are arranged in a wall between the spherical air bag and the cylindrical air bag; the surface of a tail joint of the drainage tube is provided with threads, a connecting cap is arranged at the tail part of the support tube, the inner wall and the outer wall of the connecting cap are respectively provided withthreads, and the thread in the inner wall of the connecting cap is meshed with the thread on the surface of the tail structure of the drainage tube; and the end of the needle core is provided with a connection cap, and the inner wall of the connection cap is provided with threads which are meshed with the threads on the outer wall of the connecting cap of the support tube. The needle core is inserted into the support tube and the tail end is tightly srewed; and then the support tube is placed into the drainage tube and the tail end is tightly screwed. The direct puncture type fistula expansiondrainage tube has the advantages of direct puncture, less injury, few complications and simple operation.

The invention relates to a sleeve assembly containing a balloon for direct puncture, comprising a first sealing assembly and a second sealing assembly, the second sealing assembly includes a lower shell and a hollow sleeve connected thereto and extending to the distal end , the first sealing assembly, the second sealing assembly and the hollow sleeve comprise communication and approximately aligned instrument passages, the hollow sleeve includes an inner cylinder and an outer cylinder and a sleeve wall therebetween; the hollow sleeve The distal end of the distal end also includes an open sleeve lip, the sleeve lip includes an opening lip and an inclined cylinder between the transition lip, and the inner cylinder and the inclined cylinder define a sleeve inclined wall; the balloon assembly It includes an airbag axis, an airbag lip and an airbag body connected thereto, and the airbag lip extends far to form an airbag oblique wall that matches the shape and size of the cannula oblique wall; the airbag lip extends proximally to the The airbag body is connected and transitions smoothly; the angle formed by the airbag plane of the airbag body and the airbag axis is an acute angle.

The invention discloses a direct puncture type fistula expansion drainage tube with balloons, and belongs to the technical field of medical equipment manufacture. The direct puncture type fistula expansion drainage tube comprises a drainage tube, a support tube and a needle core; the head of the drainage tube is conical, a spherical air bag and a cylindrical air bag are arranged, a connection headis arranged at the end of an inner water injection passage, and side holes are arranged in a wall between the spherical air bag and the cylindrical air bag; the surface of a tail joint of the drainage tube is provided with threads, a connecting cap is arranged at the tail part of the support tube, the inner wall and the outer wall of the connecting cap are respectively provided with threads, andthe thread in the inner wall of the connecting cap is meshed with the thread on the surface of the tail structure of the drainage tube; and the end of the needle core is provided with a connection cap, and the inner wall of the connection cap is provided with threads which are meshed with the threads on the outer wall of the connecting cap of the support tube. The needle core is inserted into thesupport tube and the tail end is tightly srewed; and then the support tube is placed into the drainage tube and the tail end is tightly screwed. The direct puncture type fistula expansion drainage tube has the advantages of direct puncture, less injury, few complications and simple operation.

The invention discloses a windowing covered stent and belongs to the field of medical instruments. The windowing covered stent is composed of two support units, each support unit is composed of a metal support, a covering membrane coated on the surface of the metal support, and a metal naked support connected with the top end of the metal support, the near end of each support unit is provided with a windowing area, and at least one membrane is arranged on the periphery below each windowing area. The windowing covered stent has the advantages that the two covering membrane support units which are adjustable in position are adopted, so that the windowing covered stent is simple in surgical operation, easy to release, supportive of direct puncture, little in trauma, less prone to displacement, quite high in surgery success rate, less in suffering of patients, reliable in effect and capable of better protecting renal artery; the windowing covered stent has high wall adhesiveness with blood vessels, seam or gaps generated at part of positions between the stent and the blood vessels are avoided effectively, and internal leakage occurrence rate is lowered.

The invention discloses a puncture type drainage tube capable of recovering a metallic biliary stent and belongs to the technical field of medical instrument manufacturing. The puncture type drainagetube comprises the metallic stent, an outer sleeve, an inner sleeve and a puncture needle. The metallic stent is formed by weaving a nickel-titanium alloy wire, and a nickel-titanium alloy recovery wire is arranged at the tail of the metallic stent. The head of the outer sleeve is conical, the head and a body of the outer sleeve are soft plastic tubes, and the tail of the outer sleeve is a hard plastic tube. The inner sleeve is made of hard plastic, the head of the inner sleeve is rhombic, a recovery wire through hole is formed in the position, close to an extending portion, of a body of the inner sleeve, a metallic stent recovery wire enters a cavity of the inner sleeve through the through hole, and a thread is formed in the surface of the tail of the inner sleeve. The puncture needle isa metal needle, a plastic resistance block is arranged at the head end of the puncture needle, a cap-shaped connector is arranged at the tail end of the puncture needle, a thread is formed in the inner wall of the cap-shaped connector, and the cap-shaped connector can be screwed at the tail end of the inner sleeve. The puncture type drainage tube has the advantages that the puncture type drainagetube can directly puncture the bile duct to enter the expanded bile duct after being assembled; the inner sleeve is used as an outer drainage tube, after the fistula tract is formed, the metallic stent recovery wire is buried in the skin of a puncture point, and the puncture point is sutured; and the metallic stent can be recovered.

The invention relates to a puncture probe for neural navigation. The puncture probe for neural navigation comprises an adapter and a needle puncture needle; the adapter comprises a positioning body and a fixing part; the fixing part is arranged at the bottom of the positioning body; the surface of the positioning body is connected with navigation reflective balls; the length of the puncture needle ranges from 17 mm to 22 mm; and the tail end of the puncture needle is fixedly arranged in the fixing part. The puncture probe has the advantages that the puncture probe is formed by fusing the adapter and the puncture needle, adaptation is only needed once, adaptation data are stored in a navigation system, and adaptation is not needed again in an operation; and the puncture needle serves as the puncture probe and also serves as a catheter guide core, direct puncture can be achieved, repeated adaptation is not needed during multi-tube puncture, the operation process is greatly simplified, the operation time is saved, the system error is reduced to the minimum, the puncture depth of each angle of the head can be considered, puncture deviation caused by displacement of the tail end of the puncture needle due to the fact that the puncture needle is too long and insufficient in hardness is avoided, and the puncture accuracy is guaranteed.

The invention discloses a direct puncture type fistula step-by-step expansion drainage tube with a balloon, and belongs to the technical field of medical instrument manufacturing. The direct puncturetype fistula step-by-step expansion drainage tube comprises a drainage tube body, a supporting tube and a needle core, wherein the head of the drainage tube body is conical, the drainage tube body isprovided with a spherical air bag and a cylindrical air bag, and a connector is arranged at the tail of a water injection channel in the drainage tube body; side holes are formed in the tube wall between the spherical air bag and the cylindrical air bag; threads are formed in the surface of the connector at the tail end of the drainage tube body, a connecting cap is arranged at the tail of the supporting tube, and threads are formed in the inner uniform wall and the outer wall of the connecting cap and matched with the threads in the surface of a tail structure of the drainage tub body e; thetail of the needle core is provided with a connecting cap, and the inner wall of the needle core is provided with threads matched with threads in the outer wall of the connecting cap of the supportingtube; and the needle core is inserted into the supporting tube, the tail end is screwed down, then the supporting tube is placed into the drainage tube body, and the tail end is screwed down. The direct puncture type fistula step-by-step expansion drainage tube has the advantages of direct puncture, small injury, few complications and simplicity in operation.