CN115192149A - Puncture trocar composite set - Google Patents

Abstract

The invention discloses a puncture trocar combination device which comprises a puncture needle, a sleeve, a connecting seat and a fixed seat, wherein a fluid channel is arranged in the connecting seat, one end of the fluid channel is communicated with the sleeve, the puncture needle is simultaneously penetrated in the fluid channel and the sleeve, the tip of the puncture needle protrudes out of the front end of the sleeve, a limit adjusting mechanism for adjusting the puncture needle is arranged between the puncture needle and the connecting seat, an adjusting switch is arranged on the connecting seat, a transfusion channel is arranged on the adjusting switch, the connection and disconnection between the transfusion channel and the fluid channel are controlled by the adjusting switch, a fixed bolt is arranged on the connecting seat, the fixed seat comprises a base, a bending arm is arranged on the base, and a locking mechanism capable of automatically locking and fixing the bolt is arranged at the front end of the bending arm; wherein pjncture needle is adjusted, fixed convenient, and this scheme still is provided with the fixing base of special fixed connection seat, prevents to lead to the emergence of medical malpractice because of the connecting seat is fixed unstably.

Description

Puncture trocar composite set

Technical Field

The invention relates to the technical field of medical puncture equipment, in particular to a puncture trocar combination device.

Background

At present, the puncture trocar is used for puncture suction and catheter drainage of pleuroperitoneal cavity, pericardial cavity effusion, hematocele, alcohol sclerosis of cyst, aspiration of abscess, catheter drainage, puncture catheter drainage of biliary system obstruction, puncture catheter drainage of urinary system obstruction and the like, the puncture trocar mainly comprises a puncture needle and a sleeve, the head of the sleeve is provided with a flexible catheter, the flexible catheter is sleeved on the puncture needle, for example, when medical personnel puncture the arteriovenous blood vessel of a patient by using the puncture sleeve, the puncture needle is pushed forward for a distance along the blood vessel to enable the indwelling needle sleeve to enter the blood vessel, after the puncture needle and the sleeve are confirmed to enter the blood vessel, the medical personnel fix the sleeve and pull out the puncture needle from the sleeve, the flexible catheter is detained in the blood vessel of the patient, and an extracorporeal blood circulation passage is established with the patient through the catheter to carry out dialysis treatment.

However, a relative positioning mechanism is lacked between the sleeve and the puncture needle, so that the relative position between the puncture needle and the puncture sleeve outside the puncture needle is easy to loose in the using process of the existing puncture trocar combination device, the stability between the puncture needle and the sleeve is greatly reduced, the interference is caused to the operation process of medical staff, and the normal operation is influenced.

In the process of switching the puncture trocar from puncture to transfusion, the puncture trocar needs to be taken out and then taken over on site, the operation is complicated, and if the puncture trocar is not operated properly, the risk of germ cross infection is easily caused, and the life safety of a patient is threatened.

The prior art does not have a special puncture trocar fixing device, so that the puncture trocar can only be fixed through an adhesive tape, and the fixing mode is unstable and is easy to cause safety accidents.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a puncture trocar combination device, which solves the problems that the puncture trocar is difficult to fix and has low safety and reliability in the prior art.

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

the utility model provides a puncture trocar composite set, it includes the pjncture needle, the sleeve pipe, connecting seat and fixing base, be provided with fluid passage in the connecting seat, fluid passage's one end and sleeve pipe intercommunication, the pjncture needle is worn to establish simultaneously at fluid passage and intraductal, and the most advanced sheathed tube front end of projection needle, be provided with the spacing adjustment mechanism who is used for adjusting the pjncture needle between pjncture needle and the connecting seat, be provided with regulating switch on the connecting seat, the last infusion passageway that is provided with of regulating switch, through its break-make of regulating switch control between infusion passageway and the fluid passage, be provided with fixed bolt on the connecting seat, the fixing base includes the base, be provided with crooked arm on the base, the front end of crooked arm is provided with the locking mechanism that can automatic locking fixed bolt.

The beneficial effects of adopting the above technical scheme are: according to the scheme, the relative position adjustment of the tip end of the puncture needle and the front end of the sleeve can be realized through the limiting adjustment mechanism, and meanwhile, the puncture needle can be fixed, so that puncture accidents caused by relative sliding of the puncture needle and the sleeve are prevented; the sleeve can be rapidly communicated with the infusion channel by controlling the regulating switch, so that the rapid conversion from the puncture process to the infusion process is realized, the field connection of medical personnel after the puncture is finished is avoided, and the risk of germ cross infection in the operation process is reduced.

Further, be provided with the spacing groove on the connecting seat, spacing adjustment mechanism includes limit gear and sliding block, the fixed middle part that sets up at the rotation axis of limit gear, the both ends of rotation axis are the activity respectively and are worn to establish on the both sides wall of spacing groove, and the both ends of rotation axis bulge the both sides wall of spacing groove respectively, the fixed end that sets up at the pjncture needle of sliding block, the top of sliding block is provided with the sawtooth surface, and the extending direction of sawtooth is parallel with the extending direction of pjncture needle on the sawtooth surface, limit gear and sawtooth surface mesh mutually, the bottom of sliding block and the bottom of spacing groove are slided and are laminated, be provided with the mounting that is used for fixed gear between limit gear and the spacing groove.

The beneficial effects of adopting the above technical scheme are: can drive the sliding block motion through stirring limit gear, and the sliding block can drive pjncture needle along its extending direction motion to realize the relative position regulation of pjncture needle point-end and sleeve pipe front end, its simple structure, convenient operation.

Furthermore, the fixing piece comprises a plurality of protruding portions, the protruding portions are arranged on the circumferential direction of the side face of the limiting gear, a plurality of fixing holes which are in socket fit with the protruding portions one by one are formed in one side wall of the limiting groove, and a spring which enables the protruding portions to be in socket fit with the fixing holes is sleeved on the rotating shaft between the other side wall of the limiting groove and the limiting gear.

The beneficial effects of adopting the above technical scheme are: under the condition of no external force, the plurality of convex parts on the side surface of the limit gear can be in socket fit with the plurality of fixing holes on the side wall of the limit groove through the elasticity of the spring, so that the limit gear is fixed, and the purpose of fixing the puncture needle is further achieved; when the puncture needle needs to be adjusted or pulled out, the spring is gradually compressed by continuously pressing the end part of the rotating shaft until the protruding part is pulled out of the fixed hole, the limiting gear is shifted to drive the sliding block to move, the position adjustment of the puncture needle can be realized, after the position of the puncture needle is adjusted, the pressing force at the end part of the rotating shaft is cancelled, the protruding parts and the fixed holes are subjected to socket joint fit again through the resilience force of the spring, and therefore the fixing of the limiting gear, the sliding block and the puncture needle is realized; meanwhile, the limiting fixing mode is simple to operate, one-hand operation can be achieved, the connecting base can be held by a hand during operation, and after the middle finger presses the end part of the rotating shaft, the thumb can poke the limiting gear.

Further, be provided with the cylindrical cavity of one end open-ended on the connecting seat, fluid passage runs through cylindrical cavity, regulating switch includes the cylindrical end cap of laminating and sliding seal connection mutually with cylindrical cavity, infusion channel sets up on the axis of cylindrical end cap, be provided with the dodge through-hole that is used for dodging the pjncture needle on the diameter direction of cylindrical end cap, dodge the tip intercommunication of through-hole and infusion channel, be provided with the intercommunicating pore that is used for communicateing infusion channel and fluid passage on the radius direction of cylindrical end cap, intercommunicating pore and infusion channel's tip intercommunication, and the intercommunicating pore with dodge through-hole and infusion channel all perpendicular.

The beneficial effects of adopting the above technical scheme are: when the puncture needle is required to be inserted into the connecting seat and the sleeve at the same time, the cylindrical plug is rotated to enable the avoiding through hole to be in butt joint with the fluid channel for conduction, and the puncture needle can penetrate through the fluid channel of the connecting seat until the tip of the puncture needle protrudes out of the front end of the sleeve; when the puncture needle is drawn out from the connecting seat and the sleeve, the cylindrical plug is rotated to enable the communicating hole to be in butt joint with the fluid channel on the side connected with the sleeve, so that the infusion channel on the cylindrical plug can be communicated with the sleeve, and the rapid conversion from the puncture process to the infusion process is realized.

Further, the fixed T shape rotating head that is provided with the cylindrical end cap of being convenient for rotation of cylindrical end cap of outside end of cylindrical end cap, the middle part of T shape rotating head is provided with the hole of dodging that is used for dodging infusion passageway, T shape rotating head include two first ends that are parallel to each other and with the equal vertically second end of two first ends, the extending direction of two first ends is parallel with the extending direction who dodges the through-hole, the extending direction and the intercommunicating pore extending direction of second end are parallel.

The beneficial effects of adopting the above technical scheme are: the T-shaped rotating head is convenient for the cylindrical plug to rotate, the first end and the second end can respectively reflect the position and the angle of an avoidance through hole and a communication hole which are positioned in the cylindrical cavity, and when the extending directions of the two first ends are parallel to the extending direction of the fluid channel, the butt joint and the communication between the avoidance through hole and the fluid channel can be realized by rotating the T-shaped rotating head; when the extending direction of the second end head is parallel to the extending direction of the fluid channel, the communication between the infusion channel and the cannula can be realized; when the extending directions of the first end head and the second end head are not parallel to the extending direction of the fluid channel and the included angle formed between the first end head and the second end head is larger than a certain value, the channel between the infusion channel and the sleeve is plugged and closed by the cylindrical plug.

Furthermore, the inner side end of the cylindrical plug is provided with an annular convex edge, an annular groove which is matched with the annular convex edge in a limiting mode is arranged in the cylindrical cavity, the annular convex edge is used for limiting the cylindrical plug, and the cylindrical plug is prevented from sliding out of the cylindrical cavity.

Furthermore, the bending arm comprises a plurality of base joints, the base joints are sequentially connected through universal joints, and the base joints at the two end parts are respectively connected with the base and the locking mechanism through the universal joints; wherein can realize freely adjusting of the arbitrary angle of crooked arm through the universal joint to the realization is fixed to connecting seat optional position and arbitrary angle, and its applicable scene is extensive, and the practicality is strong.

Further, locking mechanism includes the column casing, the one end of column casing is provided with the socket hole, column shells inner wall's circumference has evenly arranged a plurality of gyro wheels, the axis of a plurality of gyro wheels all is perpendicular with the axis of column casing, all be provided with the atress pole between the inner wall of a plurality of gyro wheels and column casing, the middle part of atress pole is the arc form, the middle part roll connection of gyro wheel and atress pole, the one end that a plurality of atress poles are close to the socket hole all articulates there is the arc piece that is used for contact and centre gripping fixed bolt, a plurality of arc pieces are cyclic annular and arrange.

The beneficial effects of adopting the above technical scheme are: the locking mechanism is used for clamping the fixing bolt, so that the fixing of the connecting seat is realized, when the fixing bolt is inserted into the socket hole of the columnar shell, the fixing bolt is in friction with the arc-shaped piece through the side wall, so that the stress rod is driven to rotate on the roller, and in the rotating process, a circular ring formed by the arc-shaped piece is gradually contracted, so that the arc-shaped piece gradually clamps and compresses the fixing bolt, and meanwhile, the larger the inserting force of the fixing bolt is, the larger the force of the arc-shaped piece compressing the fixing bolt is, and the more stable the fixing bolt is; when needs extract fixing bolt from the cylindrical shell, through driving stress rod antiport on the gyro wheel, make the circular ring that the arc piece encloses enlarge gradually to make the arc piece loosen fixing bolt gradually, and then realize fixing bolt's extraction.

Furthermore, a protective sleeve is arranged on the connecting seat, the gap of the protective sleeve wraps the tip of the sleeve and the puncture needle, and the front end of the protective sleeve is opened.

The beneficial effects of adopting the above technical scheme are: the protective sheath plays the effect of protective case and pjncture needle, and the front end opening of protective sheath makes this scheme use normal saline when carrying out the evacuation operation, need not to take the protective sheath, security when improving the staff operation prevents sleeve pipe and pjncture needle and external contact, reduces the probability that receives the pollution.

Furthermore, the front end opening of the sleeve is wavy, so that the front end opening of the sleeve is prevented from being abutted against the tissues at the focus of a patient to form blockage, and the suction of tissue fluid is influenced.

The invention has the beneficial effects that: the puncture trocar composite set of this scheme simple structure, convenient operation, good reliability, wherein regulation, the fixed convenience of pjncture needle can be operated by one hand, sets up special infusion passageway simultaneously, makes this scheme realize from the puncture process to the quick conversion of infusion process, and this scheme still is provided with the fixing base of special fixed connection seat, prevents to lead to the emergence of medical accident because of the fixed shakiness of connecting seat.

Drawings

FIG. 1 is a schematic view of the overall structure of the puncture trocar assembly.

Fig. 2 is a schematic structural view of the puncture needle, the cannula and the connecting seat.

Fig. 3 is a right side view of fig. 2.

Fig. 4 is a cross-sectional view of the engagement of the limit gear with the slide block.

Fig. 5 is a left side view of fig. 2.

Fig. 6 is a side view of the limit gear.

Fig. 7 is a cross-sectional view of fig. 2.

Fig. 8 is a schematic structural diagram of the regulating switch.

Fig. 9 is a sectional view of the locking mechanism.

FIG. 10 is a schematic view of the puncture trocar assembly mounting sleeve.

FIG. 11 is a schematic view of the configuration of the lancet tip and the forward end of the cannula.

The device comprises a puncture needle 1, a puncture needle 2, a sleeve 3, a connecting seat 4, a fluid channel 5, a transfusion channel 6, a fixing bolt 7, a base 8, a bending arm 9, a locking mechanism 10, a limiting groove 11, a limiting gear 12, a sliding block 13, a sawtooth surface 14, a bulge part 15, a fixing hole 16, a spring 17, a cylindrical plug 18, an avoiding through hole 19, a communicating hole 20, a T-shaped rotating head 21, a first end 22, a second end 23, an annular convex edge 24, a base joint 25, a universal joint 26, a cylindrical shell 27, a socket hole 28, a roller wheel 29, a stress rod 30, an arc-shaped sheet 31, a rotating shaft 32 and a protective sleeve.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.

Example 1

As shown in fig. 1, fig. 2 and fig. 7, the puncture trocar combination device of the present scheme includes a puncture needle 1, a cannula 2, a connection seat 3 and a fixed seat, a fluid channel 4 is provided in the connection seat 3, one end of the fluid channel 4 is communicated with the cannula 2, the puncture needle 1 simultaneously penetrates through the fluid channel 4 and the cannula 2, and the tip of the puncture needle 1 protrudes out of the front end of the cannula 2, a limit adjusting mechanism for adjusting the puncture needle 1 is provided between the puncture needle 1 and the connection seat 3, an adjusting switch is provided on the connection seat 3, a transfusion channel 5 is provided on the adjusting switch, the connection and disconnection between the transfusion channel 5 and the fluid channel 4 are controlled by the adjusting switch, a fixing plug 6 is provided on the connection seat 3, the fixed seat includes a base 7, a bending arm 8 is provided on the base 7, and a locking mechanism 9 capable of automatically locking the fixing plug 6 is provided at the front end of the bending arm 8.

Example 2

As shown in fig. 2, 3 and 4, this embodiment provides a specific solution of a limit adjusting mechanism based on embodiment 1, a limit groove 10 is disposed on the connecting seat 3, wherein the limit adjusting mechanism includes a limit gear 11 and a sliding block 12, the limit gear 11 is fixedly disposed in the middle of the rotating shaft 31, two ends of the rotating shaft 31 respectively movably penetrate through two side walls of the limit groove 10, two ends of the rotating shaft 31 respectively protrude from two side walls of the limit groove 10, the sliding block 12 is fixedly disposed at the end of the puncture needle 1, a serrated surface 13 is disposed at the top of the sliding block 12, the extending direction of the serrations on the serrated surface 13 is parallel to the extending direction of the puncture needle 1, the limit gear 11 is meshed with the serrated surface 13, the bottom of the sliding block 12 is slidably attached to the bottom of the limit groove 10, and a fixing member for fixing the gear is disposed between the limit gear 11 and the limit groove 10; sliding block 12 can be driven to move by shifting limit gear 11, and sliding block 12 can drive puncture needle 1 to move along the extending direction, so that the relative position adjustment of the tip of puncture needle 1 and the front end of sleeve 2 is realized, the structure is simple, and the operation is convenient.

Example 3

As shown in fig. 2, 5 and 6, this embodiment provides a specific solution of the fixing element on the basis of embodiment 2, the fixing element includes a plurality of protrusions 14, the plurality of protrusions 14 are disposed in the circumferential direction of the side surface of the limit gear 11, a plurality of fixing holes 15 in socket fit with the plurality of protrusions 14 are disposed on one side wall of the limit groove 10, and a spring 16 for socket fit of the protrusions 14 and the fixing holes 15 is sleeved on the rotating shaft 31 between the other side wall of the limit groove 10 and the limit gear 11.

Under the condition of no external force, the scheme can lead the plurality of bulges 14 on the side surface of the limit gear 11 to be in socket fit with the plurality of fixing holes 15 on the side wall of the limit groove 10 through the elasticity of the spring 16, thereby fixing the limit gear 11 and further achieving the purpose of fixing the puncture needle 1; when the puncture needle 1 needs to be adjusted or withdrawn, the spring 16 is gradually compressed by continuously pressing the end part of the rotating shaft 31 until the convex part 14 is withdrawn from the fixed hole 15, and at the moment, the limiting gear 11 is shifted to drive the sliding block 12 to move, so that the position adjustment of the puncture needle 1 can be realized, after the position of the puncture needle 1 is adjusted, the pressing force at the end part of the rotating shaft 31 is cancelled, and the plurality of convex parts 14 are in socket fit with the plurality of fixed holes 15 again through the resilience force of the spring 16, so that the fixing of the limiting gear 11, the sliding block 12 and the puncture needle 1 is realized; meanwhile, the limiting fixing mode is simple to operate, single-hand operation can be achieved, the connecting seat 3 can be held by hand during operation, and after the middle finger presses the end part of the rotating shaft 31, the limiting gear 11 can be shifted by the thumb.

Example 4

As shown in fig. 7 and 8, in this embodiment, on the basis of embodiment 1, a specific scheme of an adjusting switch is provided, a cylindrical cavity with an open end is provided on the connecting seat 3, the fluid channel 4 penetrates through the cylindrical cavity, the adjusting switch includes a cylindrical plug 17 attached to the cylindrical cavity and connected to the cylindrical cavity in a sliding and sealing manner, the fluid delivery channel 5 is provided on an axis of the cylindrical plug 17, an avoiding through hole 18 for avoiding the puncture needle 1 is provided in a diameter direction of the cylindrical plug 17, the avoiding through hole 18 is communicated with an end portion of the fluid delivery channel 5, a communicating hole 19 for communicating the fluid delivery channel 5 with the fluid channel 4 is provided in a radius direction of the cylindrical plug 17, the communicating hole 19 is communicated with the end portion of the fluid delivery channel 5, and the communicating hole 19 is perpendicular to both the avoiding through hole 18 and the fluid delivery channel 5.

When the puncture needle 1 is required to be inserted into the connecting seat 3 and the sleeve 2 at the same time, the cylindrical plug 17 is rotated to enable the avoiding through hole 18 to be in butt joint with the fluid channel 4 for conduction, so that the puncture needle 1 can penetrate from the fluid channel 4 of the connecting seat 3 until the tip of the puncture needle 1 protrudes out of the front end of the sleeve 2; when the puncture needle 1 is drawn out from the connecting seat 3 and the cannula 2, the cylindrical plug 17 is rotated to enable the communicating hole 19 to be in butt joint with the fluid channel 4 connected with the side of the cannula 2, and the infusion channel 5 on the cylindrical plug 17 can be communicated with the cannula 2, so that the rapid switching from the puncture process to the infusion process is realized.

Example 5

As shown in fig. 3 and 8, this embodiment provides a specific implementation scheme based on embodiment 4, a T-shaped rotating head 20 for facilitating rotation of the cylindrical plug 17 is fixed at an outer side end of the cylindrical plug 17, an avoiding hole for avoiding the infusion channel 5 is provided at a middle portion of the T-shaped rotating head 20, the T-shaped rotating head 20 includes two first end heads 21 parallel to each other and a second end head 22 perpendicular to the two first end heads 21, an extending direction of the two first end heads 21 is parallel to an extending direction of the avoiding through hole 18, and an extending direction of the second end head 22 is parallel to an extending direction of the communicating hole 19.

The T-shaped rotating head 20 facilitates the rotation of the cylindrical plug 17, wherein the first end 21 and the second end 22 can respectively reflect the positions and angles of the avoidance through hole 18 and the communication hole 19 which are positioned in the cylindrical cavity, and by rotating the T-shaped rotating head 20, when the extending directions of the two first ends 21 are parallel to the extending direction of the fluid channel 4, the butt-joint conduction of the avoidance through hole 18 and the fluid channel 4 can be realized; when the extending direction of the second end 22 is parallel to the extending direction of the fluid channel 4, the communication between the transfusion channel 5 and the cannula 2 can be realized; when the extending directions of the first end 21 and the second end 22 are not parallel to the extending direction of the fluid channel 4 and the included angle formed between the first end and the second end is larger than a certain value, the channel between the infusion channel 5 and the sleeve 2 is closed by the cylindrical plug 17.

Example 6

As shown in fig. 7 and 8, in this embodiment, a specific implementation is given on the basis of example 4, an annular protruding rib 23 is provided at an inner end of the cylindrical plug 17, and an annular groove that is in limit fit with the annular protruding rib 23 is provided in the cylindrical cavity, where the annular protruding rib 23 is used for limiting the cylindrical plug 17 and preventing the cylindrical plug 17 from sliding out of the cylindrical cavity.

Example 7

As shown in fig. 1, in this embodiment, a specific scheme of a bending arm 8 is given based on embodiment 1, the bending arm 8 includes a plurality of base joints 24, the base joints 24 are sequentially connected through universal joints 25, and the base joints 24 located at two end portions are respectively connected with a base 7 and a locking mechanism 9 through the universal joints 25; wherein can realize the free regulation of the arbitrary angle of crooked arm 8 through universal joint 25 to the realization is fixed to connecting seat 3 optional position and arbitrary angle, and it is suitable for the scene extensively, and the practicality is strong.

Example 8

As shown in fig. 9, this embodiment provides a specific solution of the locking mechanism 9 on the basis of embodiment 1 or embodiment 7, where the locking mechanism 9 includes a cylindrical housing 26, a socket 27 is provided at one end of the cylindrical housing 26, three rollers 28 that form 120 degrees with each other are uniformly arranged in the circumferential direction of the inner wall of the cylindrical housing 26, the shafts of the three rollers 28 are perpendicular to the axis of the cylindrical housing 26, stress rods 29 are provided between the three rollers 28 and the inner wall of the cylindrical housing 26, the middle portions of the stress rods 29 are arc-shaped, the rollers 28 are in rolling connection with the middle portions of the stress rods 29, arc-shaped pieces 30 for contacting and clamping the fixing pins 6 are hinged to one ends of the three stress rods 29 near the socket 27, and the three arc-shaped pieces 30 are arranged in a ring shape.

The locking mechanism 9 is used for clamping the fixing bolt 6, so as to fix the connecting seat 3, when the fixing bolt 6 is inserted from the socket hole 27 of the cylindrical shell 26, the fixing bolt 6 is rubbed with the arc-shaped piece 30 through the side wall, so as to drive the stress rod 29 to rotate on the roller 28, and in the rotating process, a ring enclosed by the arc-shaped piece 30 can gradually contract, so that the arc-shaped piece 30 gradually clamps and compresses the fixing bolt 6, and meanwhile, the larger the inserting force of the fixing bolt 6 is, the larger the force of the arc-shaped piece 30 compressing the fixing bolt 6 is, and the more stable the fixing bolt 6 is; when the fixing bolt 6 needs to be pulled out from the cylindrical shell 26, the stress rod 29 is driven to rotate reversely on the roller 28, so that the circular ring enclosed by the arc-shaped pieces 30 is gradually enlarged, the arc-shaped pieces 30 gradually loosen the fixing bolt 6, and the pulling-out of the fixing bolt 6 is realized.

Example 9

As shown in fig. 10 and fig. 11, this embodiment provides a specific implementation scheme based on example 1, a protective sleeve 32 is disposed on the connection seat 3, the protective sleeve 32 covers the tips of the cannula 2 and the puncture needle 1 in a clearance manner, and the front end of the protective sleeve 32 is open, wherein the protective sleeve 32 functions as the cannula 2 and the puncture needle 1, and the front end of the protective sleeve 32 is open, so that when the solution is emptied by using physiological saline, the protective sleeve 32 does not need to be removed, thereby improving the safety of the worker during operation, preventing the cannula 2 and the puncture needle 1 from contacting the outside, and reducing the probability of contamination; the front end opening of the sleeve 2 is wavy, and the front end opening of the sleeve 2 is wavy, so that the front end opening of the sleeve 2 is prevented from being abutted against tissues at the focus of a patient to form blockage, and the suction of tissue fluid is influenced.

The use of the puncture trocar assembly of the present embodiment will now be described with reference to fig. 1-11:

s1: when the patient needs to be transfused, the transfusion channel 5 is connected with an external conveying pipeline to be perfused with liquid medicine through an extension pipe, the conveying pipeline is closed after the transfusion channel 5, the extension pipe and the conveying pipeline are emptied, and when the patient needs to be subjected to tissue fluid suction operation, the transfusion channel 5 is connected with external tissue fluid suction equipment through the extension pipe;

s2: taking down the protective sleeve 32, pressing the end part of the rotating shaft 31 to compress the spring 16 until the bulge 14 is separated from the fixed hole 15, simultaneously shifting the limit gear 11 to enable the sliding block 12 to drive the puncture needle 1 to move back and forth until the length of the tip of the puncture needle 1 protruding out of the front end of the sleeve 2 meets the puncture requirement, loosening the end part of the rotating shaft 31, rebounding the spring 16 to enable the bulge 14 to be in socket fit with the fixed hole 15, and finishing the fixation of the puncture needle 1 and the sleeve 2;

s3: after the puncture needle 1 and the sleeve 2 are punctured into a part to be punctured of a patient, the end part of the rotating shaft 31 is pressed, the limiting gear 11 is shifted, the sliding block 12 moves towards the rear end until the sliding block 12 slides out of the limiting groove 10, and the puncture needle 1 is drawn out;

s4: rotating the T-shaped rotating head 20 until the extending direction of the second end 22 is parallel to the fluid channel 4 and is directed to the cannula 2, and completing the communication between the transfusion channel 5 and the cannula 2;

s5: the universal joint 25 on the bending arm 8 is adjusted to enable the cylindrical shell 26 to be adjusted to a proper angle, the position of the sleeve 2 which is punctured into the body of a patient is kept still, the fixing bolt 6 is inserted into the cylindrical shell 26 and is pressed forcibly, the arc-shaped sheet 30 clamps the fixing bolt 6, and the fixing of the connecting seat 3 is completed;

s6: when the transfusion operation is performed on the patient, the delivery pipe is opened to allow the medical solution to be injected into the patient through the cannula 2, and when the tissue fluid suction operation is performed on the patient, the external tissue fluid suction apparatus is opened to allow the tissue fluid in the patient to be sucked out through the cannula 2.

In conclusion, the scheme can realize the adjustment of the position of the tip end of the puncture needle 1 through the limiting and adjusting mechanism, and can also realize the fixation of the puncture needle 1, thereby preventing puncture accidents caused by the relative sliding of the puncture needle 1 and the sleeve 2; the sleeve 2 can be quickly communicated with the infusion channel 5 by controlling the regulating switch, so that the quick conversion from the puncture process to the infusion process is realized, the field connection of medical personnel after the puncture is finished is avoided, and the risk of germ cross infection in the operation process is reduced; this scheme still is provided with the fixing base of special fixed connection seat 3, prevents because of the fixed emergence that unstability leads to medical malpractice of connecting seat 3.

Claims (10)

1. The utility model provides a puncture trocar composite set, its characterized in that, includes pjncture needle (1), sleeve pipe (2), connecting seat (3) and fixing base, be provided with fluid passage (4) in connecting seat (3), the one end and sleeve pipe (2) intercommunication of fluid passage (4), pjncture needle (1) is worn to establish simultaneously in fluid passage (4) and sleeve pipe (2), and the most advanced protrusion sleeve pipe's of pjncture needle (1) front end of (2), be provided with the spacing adjustment mechanism who is used for adjusting pjncture needle (1) between pjncture needle (1) and connecting seat (3), be provided with regulating switch on connecting seat (3), be provided with infusion passageway (5) on the regulating switch, control its break-make through regulating switch between infusion passageway (5) and fluid passage (4), be provided with fixing bolt (6) on connecting seat (3), the fixing base includes base (7), be provided with bending arm (8) on base (7), the front end of arm (8) is provided with locking fastening mechanism (9) that can lock automatically.

2. The puncture trocar combination device according to claim 1, wherein a limit groove (10) is formed in the connecting seat (3), the limit adjusting mechanism comprises a limit gear (11) and a sliding block (12), the limit gear (11) is fixedly arranged in the middle of the rotating shaft (31), two ends of the rotating shaft (31) are respectively and movably arranged on two side walls of the limit groove (10), two ends of the rotating shaft (31) respectively protrude out of two side walls of the limit groove (10), the sliding block (12) is fixedly arranged at the tail end of the puncture needle (1), a sawtooth surface (13) is arranged at the top of the sliding block (12), the extending direction of sawteeth on the sawtooth surface (13) is parallel to the extending direction of the puncture needle (1), the limit gear (11) is meshed with the sawtooth surface (13), the bottom of the sliding block (12) is in sliding fit with the bottom of the limit groove (10), and a fixing piece for fixing the gear is arranged between the limit gear (11) and the limit groove (10).

3. The puncture trocar combination device according to claim 2, wherein the fixing member comprises a plurality of protrusions (14), the plurality of protrusions (14) are arranged on the circumferential direction of the side surface of the limit gear (11), a plurality of fixing holes (15) which are in one-to-one socket fit with the plurality of protrusions (14) are arranged on one side wall of the limit groove (10), and a spring (16) which enables the protrusions (14) to be in socket fit with the fixing holes (15) is sleeved on a rotating shaft (31) between the other side wall of the limit groove (10) and the limit gear (11).

4. The puncture trocar combination device according to claim 1, wherein a cylindrical cavity with an opening at one end is formed in the connecting seat (3), the fluid channel (4) penetrates through the cylindrical cavity, the adjusting switch comprises a cylindrical plug (17) which is attached to the cylindrical cavity and connected with the cylindrical cavity in a sliding and sealing mode, the infusion channel (5) is arranged on the axis of the cylindrical plug (17), an avoiding through hole (18) used for avoiding the puncture needle (1) is formed in the diameter direction of the cylindrical plug (17), the avoiding through hole (18) is communicated with the end portion of the infusion channel (5), a communication hole (19) used for communicating the infusion channel (5) and the fluid channel (4) is formed in the radius direction of the cylindrical plug (17), the communication hole (19) is communicated with the end portion of the infusion channel (5), and the communication hole (19) is perpendicular to the avoiding through hole (18) and the infusion channel (5).

5. The puncture trocar combination device according to claim 4, wherein a T-shaped rotating head (20) convenient for the cylindrical plug (17) to rotate is fixedly arranged at the outer side end of the cylindrical plug (17), an avoiding hole used for avoiding the transfusion channel (5) is formed in the middle of the T-shaped rotating head (20), the T-shaped rotating head (20) comprises two first end heads (21) which are parallel to each other and a second end head (22) which is perpendicular to the two first end heads (21), the extending direction of the two first end heads (21) is parallel to the extending direction of the avoiding through hole (18), and the extending direction of the second end head (22) is parallel to the extending direction of the communicating hole (19).

6. A puncture trocar combined device according to claim 4, characterized in that the inner end of the cylindrical plug (17) is provided with an annular convex rib (23), and an annular groove which is in limit fit with the annular convex rib (23) is arranged in the cylindrical cavity.

7. The puncture trocar assembly according to claim 1, wherein the bending arm (8) comprises a plurality of base joints (24), the base joints (24) are sequentially connected through universal joints (25), and the base joints (24) at two ends are respectively connected with the base (7) and the locking mechanism (9) through the universal joints (25).

8. The puncture trocar combination device according to claim 7, wherein the locking mechanism (9) comprises a cylindrical shell (26), a bearing hole (27) is formed in one end of the cylindrical shell (26), a plurality of rollers (28) are uniformly arranged on the circumferential direction of the inner wall of the cylindrical shell (26), the axes of the rollers (28) are perpendicular to the axis of the cylindrical shell (26), stress rods (29) are arranged between the rollers (28) and the inner wall of the cylindrical shell (26), the middle of each stress rod (29) is arc-shaped, the rollers (28) are in rolling connection with the middle of each stress rod (29), arc-shaped pieces (30) used for contacting and clamping and fixing a bolt (6) are hinged to one ends of the stress rods (29) close to the bearing hole (27), and the arc-shaped pieces (30) are annularly arranged.

9. A puncture trocar combination according to claim 1, characterized in that a protective sleeve (32) is arranged on the connecting base (3), the protective sleeve (32) is clearance wrapped around the tip of the puncture needle (1) and the cannula (2), and the front end of the protective sleeve (32) is open.

10. A puncturing trocar combination according to claim 1, characterized in that the front port of the cannula (2) is wavy.

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