CN111249557A

CN111249557A - Artery/vein cannula external member

Info

Publication number: CN111249557A
Application number: CN202010093966.XA
Authority: CN
Inventors: 李轶江
Original assignee: Shenzhen Hno Medical Technology Co ltd
Current assignee: Shenzhen hannuo Medical Innovation Technology Co., Ltd
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2020-06-09

Abstract

The invention relates to an improved Seldinger intubation technique, in particular to an artery/vein intubation kit, which comprises: the blood pump comprises a cannula, a cannula core and a check valve, wherein the cannula is provided with openings at two ends and a hollow inner cavity, the cannula core is inserted into the hollow inner cavity of the cannula in a penetrating mode, and the check valve is used for preventing blood from being sprayed out after the cannula core is drawn out. The embodiment of the invention is mainly used for carrying out puncture operation on vein blood vessels and artery blood vessels in clinical use to build extracorporeal circulation operation, the artery/vein intubation kit disclosed by the invention simplifies the insertion operation process, and prevents bleeding by utilizing the first hemostasis structure at the back end of the tube body, and the second hemostasis structure is inserted into the rear end interface of the intubation tube to prevent the blood from being sprayed out after the intubation tube core is drawn out, thereby further reducing the bleeding risk.

Description

Artery/vein cannula external member

Technical Field

The invention relates to an improved Seldinger method intubation technique, in particular to an artery/vein intubation kit.

Background

Advanced life support refers to rescue by medical professionals at the site of cardiac arrest, or on the way to the medical community. This phase may employ some aids, special techniques, etc. to establish more effective ventilation and blood circulation. The purpose of the Chinese medicinal composition is to promote the heart to recover the pulsation, recover the spontaneous circulation, improve the perfusion pressure of the heart and the brain, relieve the acidemia and improve the ventricular fibrillation threshold. Mainly comprises ventilation and oxygen supply, circulation support, electrical defibrillation, monitoring of functions of internal organs after resuscitation and the like, wherein extracorporeal circulation is usually required to be established in the circulation support, so that arteriovenous vessels are correspondingly punctured according to requirements.

ECMO is an english abbreviation of extracorporeal membrane oxygenation (extracorporeal membrane oxygenation) and is an important technology for life support of critically ill patients with severe cardiopulmonary failure. ECMO emergency treatment equipment mainly comprises an intravascular cannula, a connecting pipe, a power pump (artificial heart), an oxygenator (artificial lung), an oxygen supply pipe and a monitoring system. The main modes of ECMO are V-V (vent-vent) circulation and V-A (vent-area) circulation, and in general, the V-V circulation method is a mode of lung replacement, and the V-A circulation method is a mode of heart-lung combined replacement.

At present, the intubation tube kit used for puncturing the artery and vein blood vessels in the clinical use process mostly needs to be operated by inserting the intubation tube core and inserting the intubation tube in two steps in sequence, and the operation of an operator is complex and easy to miss due to the fact that the blood vessels are expanded for many times according to different caliber sizes of the intubation tube core, and the problems that the operator is easy to bleed, the wound is prone to infection and the like due to the structural design of the existing intubation tube core and the intubation tube are caused when the operator operates.

Disclosure of Invention

The embodiment of the invention aims to provide an artery/vein cannula suite with a reasonable design, which is used for solving the technical problems that in the prior art, the operation is complex, the error is easy, and the cannula is easy to bleed when entering a blood vessel.

In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:

the cannula kit includes: the novel blood-stopping intubation tube comprises an intubation tube and an intubation tube core, wherein openings are formed in two ends of the intubation tube, the intubation tube is provided with a hollow inner cavity, the intubation tube core is inserted into the hollow inner cavity of the intubation tube in a penetrating mode, the intubation tube is provided with a front-end tube body with a smaller caliber and a rear-end tube body with a larger caliber, a transition section with the gradually changed caliber is arranged between the front-end tube body and the rear-end tube body, a sectional type puncturing part is arranged on the front portion of the intubation tube core body and penetrates through the hollow inner cavity of the intubation tube and extends out of the front-end opening of the intubation tube, a first aperture for a guide wire to penetrate through is arranged in the intubation tube core, the opening of the first aperture is located at the tip of the puncturing part, the rear-end tube body is provided with a first blood-stopping structure working area, a second blood-stopping structure for.

Preferably, the first hemostatic structure is a hemostatic clamp/forceps and the second hemostatic structure is a check valve.

Preferably, the check valve is inside to be made by the silica gel material and to have the check valve that can elastic deformation, the check valve is to the slope of the cannula core insertion direction and by central authorities to root thickness increase gradually, the clearance hole is left and is held tightly through the clearance hole to the center of check valve the cannula core body.

Preferably, the sectional piercing part has a hardness decreasing from the end portion to the tail portion, and the sectional piercing part has a caliber increasing from the end portion to the tail portion.

Preferably, the segment type puncture part tip hardening interval section is 8mm to 12mm in length.

Preferably, the end part of the cannula core body, which is far away from the puncture part, is provided with a handheld end which is convenient for an operator to hold and insert, the front end of the handheld end is inserted into the interface of the rear end of the second blood backflow prevention, the handheld end is provided with a soft rubber shell, first anti-skid grains are arranged on the surface of the handheld end along the stress direction, a second aperture for a guide wire to pass through is formed in the handheld end, and the second aperture is communicated with the first aperture.

Preferably, a luer is arranged on the side surface of the rear-end tube body of the insertion tube and communicated with the hollow inner cavity of the insertion tube.

Preferably, the outer surface of the tube body at the rear end of the luer connector is provided with a second anti-slip thread along the rotation stress direction.

Preferably, the blood vessel insertion part of the front end pipe body is provided with a plurality of rows of through holes penetrating through the inside and the outside of the insertion pipe, each row of through holes are arranged at equal intervals along the pipe axis direction, and the through holes between the adjacent rows are arranged at a certain interval in a staggered manner along the pipe axis direction.

Preferably, the through holes are oval in shape, the specific spacing of the through holes between adjacent rows on the insertion tube in the tube axis direction is between 0.2mm and 0.4mm, and the equal spacing between each row of the through holes on the insertion tube is between 40mm and 60 mm.

Preferably, the tube body of the insertion tube is provided with a fixing lug, and the fixing lug is provided with a plurality of mounting holes.

Preferably, a spring for enhancing bending resistance is arranged in the wall of the cannula, and the spring in the area corresponding to the transition section of the cannula is hardened.

Preferably, the interface of the connector is a luer taper and the length of the interface section is at least 25 mm.

Preferably, the cannula is divided into two lengths according to the difference between vein and artery, wherein the total length of the cannula for vein puncture is 650mm, the total length of the cannula for artery puncture is 300mm, and the wall thickness of the cannula is 0.4-0.5 mm.

Compared with the prior art, the embodiment of the invention has the following advantages:

in the embodiment of the invention, an artery/vein cannula suite with reasonable design is provided, mainly in clinical use, puncture operation is carried out on vein vessels and artery vessels to build an extracorporeal circulation operation, specifically, an operator of the cannula suite disclosed by the embodiment of the invention firstly inserts a guide wire through a steel needle core, the cannula and the cannula core are inserted into the vessels to a target position and play a role in expanding the vessels through the guide wire guiding, when bleeding occurs, the guide wire and the cannula core are taken out, the cannula is left in a human body to build the extracorporeal circulation operation, as the hardness of a puncture part of the cannula core in the cannula suite disclosed by the invention is reduced from the end part to the tail part and the caliber of the puncture part is increased from the end part to the tail part, the operator can insert the cannula and the cannula core into the vessels to the target position together to play a role in expanding the vessels, and the operation method of the cannula suite disclosed by the embodiment of the invention and the operation method of inserting the cannula and the prior art that the The pipe is different, so simplified the insertion operation, in addition, utilizes first non return blood structure to prevent to bleed at the rear end pipe shaft, and intubate rear end interface interpolation has the non return blood structure of second, prevents that the intubate core from taking out back blood blowout, has further reduced the risk of bleeding.

Drawings

FIG. 1 is a perspective view of the overall construction of an intravenous cannula set disclosed in accordance with an embodiment of the present invention;

FIG. 2 is a side view of a cannula of an intravenous cannula set disclosed in an embodiment of the present invention;

FIG. 3 is a perspective view of the overall structure of an arterial cannula kit according to the disclosed embodiment of the invention;

FIG. 4 is a side view of a cannula of an arterial cannula kit according to an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of a check valve of an arterial/venous cannula set according to an embodiment of the present invention;

FIG. 6 is a perspective view of a cannula core of an arterial/venous cannula set as disclosed in an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a fixing ear of an artery/vein cannula set according to an embodiment of the present invention.

The reference numbers are as follows:

1, inserting a tube; 11 front end pipe body; 12 rear end pipe body; 121 hemostatic clamp/hemostatic forceps working area; 122 fixing the ear mounting position; a model 123 identification area; 13 a transition section; 14 a hollow interior; 15 through holes; 2 inserting the tube core; 21 a tube core body; 22 a puncturing part; 221 a first transition section; 222 a second transition section; 23, a handheld end; 231 first anti-skid veins; 24 a first aperture; 3 a check valve; 31 a check valve; a clearance hole 32; 4 second anti-skid lines; 5, fixing the lug; 51 a central hole; 52 mounting holes; 6 luer interface; 7 spring.

Detailed Description

The invention mainly aims to provide an artery/vein intubation kit with reasonable design aiming at the defects and shortcomings of the prior art, mainly aims at performing puncture operation on vein blood vessels and artery blood vessels in clinical use to build an extracorporeal circulation operation, and can simplify the intubation operation process, enhance the intubation stability and reduce bleeding.

The arterial/venous cannula set is further described below in connection with figures 1-7 and examples 1-2:

example 1

Referring to fig. 1, the present invention provides an intravenous cannula kit comprising a cannula 1 as shown in fig. 2, a cannula core 2 as shown in fig. 6, and a check valve 3 as shown in fig. 5.

The total length of intubation tube 1 is 650mm, and intubation tube 1 both ends opening just has cavity inner chamber 14, and intubation tube 1 has less bore length to be 500 mm's front end shaft 11 and the rear end shaft 12 of great bore, and front end shaft 11 still has the open end and melts the head, is easier to carry out subcutaneous puncture, is equipped with the transition section 13 that the length that the bore is 25mm that bore gradual change is equipped with on this intubation tube 1's the shaft between front end shaft 11 and rear end shaft 12. The front end tube body 11 of the insertion tube 1 is provided with a plurality of rows of oval through holes 15 penetrating through the inside and the outside of the insertion tube, the through holes 15 in each row are arranged at equal intervals along the tube axis direction, the equal intervals are 40mm-60mm, the through holes in adjacent rows are arranged at a specific interval along the tube axis direction in a staggered mode, and the specific interval is 0.2mm-0.4 mm. The front end of the front end pipe body 11 is provided with holes in a staggered mode, so that the risk of bending the front end pipe body 11 is reduced. Be equipped with the fixed ear 5 that fig. 7 shows on the shaft of intubate 1, be equipped with centre bore 51 and be located a plurality of mounting holes 52 of centre bore outlying on this fixed ear 5, the position of leaning on in the front of the rear end shaft 12 of intubate 1 is provided with fixed ear mounted position 122, fixed ear 5 passes through centre bore 51 suit on this fixed ear mounted position 122, fixed ear 5 also can with intubate 1 integrated into one piece, fixed ear 5 and mounting hole 52 make things convenient for intubate 1 fixed, strengthen the stability of intubate 1, prevent that the extracorporeal circulation operation from building the back because the removal of pipeline and expand the intubate mouth, reduce wound infection. The rear end tube body 12 of the cannula 1 is also provided with a hemostatic clamp/hemostatic forceps working area 121 which is convenient for an operator to identify and clamp a hemostatic clamp/hemostatic forceps, so that the operator is prevented from using a wrong position of the hemostatic clamp/hemostatic forceps; after the cannula 1 is inserted into a blood vessel, the cannula 1 is clamped by the hemostatic clamp/hemostatic forceps in the hemostatic clamp/hemostatic forceps working area 121 to prevent blood from flowing out, the two ends of the cannula 1 are open, and a vent is not required to be arranged, so that the hemostatic clamp/hemostatic forceps can be clamped and matched in the hemostatic clamp/hemostatic forceps working area 121 to prevent bleeding in the puncture process. The tube wall of the cannula 1 is also internally provided with a spring 7 (not shown) for enhancing bending resistance, the spring corresponding to the transition section 13 area of the cannula 1 is hardened, the thickness of the tube wall of the cannula 1 is 0.4-0.5mm, and due to the staggered open holes of the tube body of the cannula 1, the built-in spring and the material of the cannula, the risk of bending the tube body is reduced, so that the tube body wall of the cannula 1 is thinner and is not bent, and the blood flow is larger and more stable.

The total length of the cannula core 2 is 680mm, the front part of the cannula core body 21 is provided with a sectional puncture part 22, two sections are taken as an example in fig. 6, a first transition section 221 and a second transition section 222, wherein the length of the first transition section 221 is 25mm, the length of the second transition section 222 is 25mm, the hardness of the first transition section 221 and the hardness of the second transition section 222 can be gradually hardness or the same hardness, if the hardness is gradually hardness, the hardness of the first transition section 221 is gradually reduced from the tip to the contact with the second transition section 222, the hardness of the second transition section 222 is gradually reduced from the contact with one end of the first transition section 221 to the other end, if the hardness is the same, the hardness of the first transition section 221 is larger than that of the second transition section 222, the calibers of the first transition section 221 and the second transition section 222 are sequentially increased, and the structural design operator can insert the cannula core with the cannula core to the target position to play a role of expanding the blood vessel, the insertion operation is simplified, in addition, the lengths of the first transition section 221 and the second transition section 222 can be set to be unequal according to requirements, the puncture part 22 penetrates through the hollow inner cavity 14 and extends out of the front end opening of the cannula 1, the cannula core 2 is provided with a hardened tip at the end part of the puncture part 22, the hardness is greater than that of other sections of the cannula core 2, the length of the hardened section of the tip is 8-12 mm, for example, the length of the hardened tip can be 10mm, the tip of the cannula core is hardened, the insertion is easier, the bleeding rate is reduced, the sectional type puncture part is convenient for dealing with blood vessels with different sizes, the puncture operation is simplified, the first aperture 24 for a guide wire to pass through is arranged in the cannula core 2, and the opening of the first aperture 24 is positioned at the tip of the puncture part 22.

Preferably, referring to fig. 1, the intravenous cannula kit in the embodiment of the present invention further includes a check valve 3 as shown in fig. 5 for preventing blood from being ejected after the cannula core 2 is withdrawn, the check valve 3 has a length of 40mm, the check valve 3 is inserted into the rear port of the cannula 1, and the cannula core 2 is inserted into the hollow inner cavity 14 of the cannula 1 through the check valve 3. Referring to fig. 5, the check valve 3 is made of silicone material and has a check valve 31 capable of elastically deforming, the check valve 31 is inclined towards the insertion direction of the cannula core 2 and gradually increases in thickness from the center to the root, and after the cannula core body is inserted into the cannula 1 through the clearance hole 32, the check valve 31 holds the cannula core body 21 tightly.

In the embodiment of the invention, on the basis of preventing bleeding by clamping the cannula 1 by the hemostatic clamp/hemostatic forceps at the rear end tube body 12, the check valve 3 is inserted in the rear end opening of the cannula 1, so as to further prevent bleeding, particularly prevent blood from being ejected after the cannula core 2 is drawn out, and double bleeding prevention measures are formed by the hemostatic clamp/hemostatic forceps and the check valve, so that the bleeding risk is reduced.

Preferably, referring to fig. 1 and 6, the end of the cannula core body 21 away from the puncturing part 22 is provided with a handheld end 23 for an operator to hold and insert, the front end of the handheld end 23 is inserted into the interface at the rear end of the check valve 3, the handheld end 23 is provided with a soft rubber shell, a first anti-skid thread 231 is arranged on the surface along the force-bearing direction, a second aperture for a guide wire to pass through is arranged inside the handheld end 23, and the second aperture is communicated with the first aperture 24.

In the embodiment of the invention, the handheld end 23 is arranged at the rear end of the tube inserting core 2, so that the operation of the handheld tube inserting core is more convenient, particularly, the first anti-slip pattern 231 is arranged on the surface of the shell of the handheld end 23, and the first anti-slip pattern 231 is beneficial to the stress in the inserting and pulling direction, so that the design of the handheld end 23 is especially beneficial to the inserting and pulling operation of the tube inserting core, in addition, the front part of the handheld end 23 is provided with a plurality of steps, so that the insertion and pulling operation is convenient to be connected to the rear end interface of the check.

Preferably, referring to fig. 2, the outer surface of the side surface of the rear end tube body 12 of the insertion tube 1 is provided with second anti-slip threads 4 along the rotation force-bearing direction, and the arrangement of the force-bearing direction of the second anti-slip threads 4 is beneficial for an operator to perform rotation operation on the insertion tube 1.

Preferably, referring to fig. 2, a model identification area 123 printed or adhered with a product identification and a model is further arranged between the hemostatic clamp/hemostatic clamp working area 121 and the fixed ear installation position 122 of the rear end tube body 12 of the cannula 1. The user can conveniently identify the product and the model thereof, and the wrong product and model can be prevented from being selected.

In combination with the above, the method for performing a puncturing operation on a vein or artery and establishing an extracorporeal circulation operation in clinical use of the venous cannula set for surgical use disclosed in this embodiment will be briefly described below.

Specifically, during surgery, firstly, anesthesia is performed at a puncture site, a guide wire is inserted through a steel needle core, a cannula and a cannula core are inserted into a blood vessel through guide of the guide wire, the guide wire and the cannula core are taken out when bleeding occurs, the cannula is left in a human body to build extracorporeal circulation surgery, because the hardness of a puncture part of the cannula core in the cannula kit disclosed by the invention is reduced from the end part to the tail part and the caliber of the puncture part is increased from the end part to the tail part, an operator can insert the cannula and the cannula core into the blood vessel to a target position to play a role of expanding the blood vessel, the operation method of the cannula kit disclosed by the embodiment of the invention is different from that the cannula and the cannula core are inserted into the blood vessel in steps in the prior art, so that the insertion operation is simplified, in the operation, the cannula is tightly clamped by a hemostatic clamp/hemostatic clamp on the rear end of the tube body to prevent bleeding, and a check, the blood is prevented from being sprayed out after the cannula core is drawn out, and the bleeding risk is further reduced.

Example 2

Referring to fig. 3, the present invention provides an arterial cannula kit comprising a cannula 1 as shown in fig. 4, a cannula core 2 as shown in fig. 6, and a check valve 3 as shown in fig. 5.

Total length of 1 intubate is 300mm, 1 both ends opening of intubate just has cavity inner chamber 14, intubate 1 has less bore length to be 150 mm's front end shaft 11 and the rear end shaft 12 of great bore, rear end shaft 12 is long to be 125mm, front end shaft 11 still has the open end melt head, it is easier to carry out subcutaneous puncture, be equipped with bore gradual change's changeover portion 13 on this intubate 1's shaft between front end shaft 11 and rear end shaft 12, the length of changeover portion 13 is 25 mm. The front end tube body 11 of the insertion tube 1 is provided with a plurality of rows of oval through holes 15 penetrating through the inside and the outside of the insertion tube, the through holes 15 in each row are arranged at equal intervals along the tube axis direction, the equal intervals are 40mm-60mm, the through holes in adjacent rows are arranged at a specific interval along the tube axis direction in a staggered mode, and the specific interval is 0.2mm-0.4 mm. The front end of the front end pipe body 11 is provided with holes in a staggered mode, so that the risk of bending the front end pipe body 11 is reduced. Be equipped with the fixed ear 5 that fig. 7 shows on the shaft of intubate 1, be equipped with centre bore 51 and be located a plurality of mounting holes 52 of centre bore outlying on this fixed ear 5, the position of leaning on in the front of the rear end shaft 12 of intubate 1 is provided with fixed ear mounted position 122, fixed ear 5 passes through centre bore 51 suit on this fixed ear mounted position 122, fixed ear 5 can be with intubate 1 integrated into one piece, fixed ear 5 and mounting hole 52 make things convenient for intubate 1 fixed, strengthen the stability of intubate 1, prevent that the extracorporeal circulation art from building the back because the removal of pipeline and expand the intubate mouth, reduce wound infection. The rear end 12 of the cannula 1 is also provided with a hemostatic clamp/hemostatic clamp working area 121 which is convenient for an operator to identify and clamp a hemostatic clamp/hemostatic clamp, so that the operator is prevented from using a wrong position of the hemostatic clamp/hemostatic clamp; after the cannula 1 is inserted into a blood vessel, the cannula 1 is clamped by the hemostatic clamp/hemostatic forceps in the hemostatic clamp/hemostatic forceps working area 121 to prevent blood from flowing out, the two ends of the cannula 1 are open, and a vent is not required to be arranged, so that the hemostatic clamp/hemostatic forceps can be clamped and matched in the hemostatic clamp/hemostatic forceps working area 121 to prevent bleeding in the puncture process. The tube wall of the cannula 1 is also internally provided with a spring 7 (not shown) for enhancing bending resistance, the spring corresponding to the transition section 13 area of the cannula 1 is hardened, the thickness of the tube wall of the cannula 1 is 0.4-0.5mm, and due to the staggered open holes of the tube body of the cannula 1, the built-in spring and the material of the cannula, the risk of bending the tube body is reduced, so that the tube body wall of the cannula 1 is thinner and is not bent, and the blood flow is larger and more stable.

The total length of the cannula core 2 is 380mm, the front part of the cannula core body 21 is provided with a sectional type puncturing part 22, two sections are taken as an example in fig. 6, a first transition section 221 and a second transition section 222, wherein the length of the first transition section 221 is 25mm, the length of the second transition section 222 is 25mm, the hardness of the first transition section 221 and the hardness of the second transition section 222 can be gradually hardness or the same hardness, if the hardness is gradually hardness, the hardness of the first transition section 221 is gradually reduced from the tip to the contact with the second transition section 222, the hardness of the second transition section 222 is gradually reduced from the contact with one end of the first transition section 221 to the other end, if the hardness is the same, the hardness of the first transition section 221 is larger than that of the second transition section 222, the calibers of the first transition section 221 and the second transition section 222 are sequentially increased, and the structural design operator can puncture the cannula together with the cannula core to the target position to play a blood vessel dilating role, the insertion operation is simplified, in addition, the lengths of the first transition section 221 and the second transition section 222 can be set to be unequal according to requirements, the puncture part 22 penetrates through the hollow inner cavity 14 and extends out of the front end opening of the cannula 1, the cannula core 2 is provided with a hardened tip at the end part of the puncture part 22, the hardness is greater than that of other sections of the cannula core 2, the length of the hardened section of the tip is 8-12 mm, for example, the length of the hardened tip can be 10mm, the tip of the cannula core is hardened, the insertion is easier, the bleeding rate is reduced, the sectional type puncture part is convenient for dealing with blood vessels with different sizes, the puncture operation is simplified, the first aperture 24 for a guide wire to pass through is arranged in the cannula core 2, and the opening of the first aperture 24 is positioned at the tip of the puncture part 22.

Preferably, referring to fig. 3, the arterial cannula kit in the embodiment of the present invention further includes a check valve 3 as shown in fig. 5 for preventing blood from being ejected after the cannula core 2 is withdrawn, the check valve 3 has a length of 40mm, the check valve 3 is inserted into the rear port of the cannula 1, and the cannula core 2 is inserted into the hollow inner cavity 14 of the cannula 1 through the check valve 3. Referring to fig. 5, the check valve 3 is made of silicone material and has a check valve 31 capable of elastically deforming, the check valve 31 is inclined towards the insertion direction of the cannula core 2 and gradually increases in thickness from the center to the root, and after the cannula core body is inserted into the cannula 1 through the clearance hole 32, the check valve 31 holds the cannula core body 21 tightly.

Preferably, referring to fig. 3 and 6, the end of the cannula core body 21 far away from the puncturing part 22 is provided with a handheld end 23 for an operator to hold and insert, the front end of the handheld end 23 is inserted into the interface at the rear end of the check valve 3, the handheld end 23 is provided with a soft rubber shell, a first anti-skid thread 231 is arranged on the surface along the force-bearing direction, a second aperture for a guide wire to pass through is arranged inside the handheld end 23, and the second aperture is communicated with the first aperture 24.

Preferably, referring to fig. 4, the rear end tube body 12 of the cannula 1 of the arterial cannula kit in the embodiment of the present invention is laterally provided with a luer 6, and the luer 6 is communicated with the hollow inner cavity 14 of the cannula 1. The luer 6 is one of the main differences between the arterial cannula set and the venous cannula set, and because the arterial blood is different from the venous blood, and in contrast, the arterial blood contains more oxygen, the luer 6 is arranged on the cannula 1 of the arterial cannula set, so that the blood component and blood gas detection of the arterial blood sampling through the luer in operation is facilitated. The outer surface of the rear-end tube body 12 of the luer connector 6 is provided with second anti-skidding threads 4 along the rotation stress direction, and the arrangement of the stress direction of the second anti-skidding threads 4 is beneficial for an operator to perform rotation operation on the insertion tube 1.

Preferably, referring to fig. 4, a model identification area 123 printed or adhered with a product identification and a model is further arranged between the hemostatic clamp/hemostatic clamp working area 121 and the fixed ear installation position 122 of the rear end tube body 12 of the cannula 1. The user can conveniently identify the product and the model thereof, and the wrong product and model can be prevented from being selected.

In combination with the above, the method for performing a puncturing operation on a vein or artery blood vessel and performing an extracorporeal circulation operation in a clinical use of the surgically used arterial cannula kit disclosed in this embodiment will be briefly described below.

Specifically, during surgery, firstly, anesthesia is performed at a puncture site, a guide wire is inserted through a steel needle core, a cannula and a cannula core are inserted into a blood vessel through guide of the guide wire, the guide wire and the cannula core are taken out when bleeding occurs, the cannula is left in a human body to build extracorporeal circulation surgery, because the hardness of a puncture part of the cannula core in the cannula kit disclosed by the invention is reduced from the end part to the tail part and the caliber of the puncture part is increased from the end part to the tail part, an operator can insert the cannula and the cannula core into the blood vessel to a target position to play a role of expanding the blood vessel, the operation method of the cannula kit disclosed by the embodiment of the invention is different from that the cannula and the cannula core are inserted into the blood vessel in steps in the prior art, so that the insertion operation is simplified, in the operation, the cannula is tightly clamped by a hemostatic clamp/hemostatic clamp on the rear end of the tube body to prevent bleeding, and a check, the blood is prevented from being sprayed out after the cannula core is drawn out, and the bleeding risk is further reduced. Arterial blood sampling and blood constituent blood gas detection are performed in operation through the luer on the cannula of the arterial cannula set.

The artery/vein intubation set provided by the embodiment of the invention can be suitable for both vein and artery intubation, and has the following advantages compared with the existing blood vessel intubation:

1. the first blood-stopping structure and the first blood-stopping structure are utilized to form a double bleeding prevention measure, and particularly, the blood can be prevented from being sprayed out of the cannula after the cannula core is drawn out, so that the bleeding risk is greatly reduced;

2. the fixing lug and the mounting hole are convenient for fixing the cannula, the stability of the cannula is enhanced, the cannula opening is prevented from being expanded due to the movement of the pipeline after the extracorporeal circulation operation is built, and the wound infection is reduced;

3. the cannula tube body is additionally provided with a first blood return prevention structure working area, so that a user is prevented from using the first blood return prevention structure to misplace the position;

4. the tip of the cannula core is hardened, so that the insertion is easier, the bleeding rate is reduced, the sectional type puncture part is convenient to deal with blood vessels with different sizes, and the insertion operation is simplified;

5. the dislocation trompil and the built-in spring of intubate shaft reduce the risk that the shaft buckles, and then make the shaft wall thinner and not buckle, and blood flow is bigger more stable.

The embodiments of the present invention are disclosed as the preferred embodiments, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention and make various extensions and changes without departing from the spirit of the present invention.

Claims

1. An arterial/venous cannula kit, the cannula kit comprising: the intubation tube is characterized in that the intubation tube is provided with a front end tube body with a smaller caliber and a rear end tube body with a larger caliber, a transition section with gradually changed calibers is arranged between the front end tube body and the rear end tube body, the front part of the intubation tube body is provided with a sectional type puncture part, the puncture part penetrates through the intubation tube hollow inner cavity and extends out from the intubation tube front end opening, a first aperture for a guide wire to pass through is arranged in the intubation tube, the opening part of the first aperture is positioned at the tip of the puncture part, the rear end tube body is provided with a first blood return prevention structure working area, a second blood return prevention structure for preventing the intubation tube from being ejected after the intubation tube is inserted at the interface of the rear end tube body, and the intubation tube is inserted into the hollow inner cavity of the intubation tube through the check valve.

2. The arterial/venous cannula kit of claim 1 wherein the first anti-backup structure is a hemostatic clamp/hemostat and the second anti-backup structure is a check valve.

3. The artery/vein cannula kit according to claim 2, wherein the check valve is made of silicone material and has an elastically deformable check valve therein, the check valve is inclined towards the insertion direction of the cannula core and gradually increases in thickness from the center to the root, and a clearance hole is left in the center of the check valve and clasps the cannula core body through the clearance hole.

4. The av cannula kit of claim 1 wherein said segmented piercing portion decreases in hardness from tip to tail and increases in caliber from tip to tail.

5. The arterial/venous cannula kit of claim 4 wherein the segmented piercing portion tip stiffening interval is 8mm to 12mm in length.

6. The arteriovenous cannula kit according to claim 4, wherein the end of the cannula core body away from the puncturing part is provided with a handheld end which is convenient for an operator to hold and insert, the front end of the handheld end is inserted into the interface of the rear end of the second blood return preventing structure, the handheld end is provided with a soft rubber shell and is provided with a first anti-skid thread on the surface along a force-bearing direction, a second aperture for a guide wire to pass through is formed in the handheld end, and the second aperture is communicated with the first aperture.

7. The arterio/venous cannula kit of claim 1 wherein the rear barrel side of the cannula is provided with a luer which communicates with the cannula hollow lumen.

8. The arterio/venous cannula kit of claim 7, wherein the outer surface of the body at the rear end of said luer fitting is provided with a second anti-slip thread in the direction of rotational force.

9. The arteriovenous cannula kit of claim 1 wherein the front body portion for insertion into a blood vessel is provided with a plurality of rows of through holes passing through the interior and exterior of the cannula, each row of through holes being formed at equal intervals in the direction of the tube axis, and the through holes between adjacent rows being formed at offset intervals in the direction of the tube axis.

10. The arterio/venous cannula kit of claim 9 wherein the through holes are oval in shape, the specific spacing of the through holes in the cannula between adjacent rows in the direction of the tubular axis is between 0.2mm and 0.4mm, and the equal spacing of the through holes in each row on the cannula is between 40mm and 60 mm.

11. The arteriovenous cannula kit of claim 1 wherein the cannula body has a mounting ear formed thereon, said mounting ear having a plurality of mounting holes formed therein.

12. The arterio/venous cannula kit of claim 1 wherein said cannula tube wall has springs disposed therein for enhanced kink resistance and said springs are stiffened in regions corresponding to said cannula transition.

13. The arterio/venous cannula kit of claim 1 wherein said cannula is divided into two lengths depending on the vein and arterial blood vessels, wherein the total cannula length for venipuncture is 650mm, the total cannula length for arterial puncture is 300mm, and the cannula wall thickness is 0.4-0.5 mm.