CN210020643U

CN210020643U - Syringe

Info

Publication number: CN210020643U
Application number: CN201822176770.8U
Authority: CN
Inventors: 袁友; 黄驰; 罗茜; 陈芳; 牟燕燕
Original assignee: Affiliated Hospital of Zunyi Medical University
Current assignee: Affiliated Hospital of Zunyi Medical University
Priority date: 2018-12-24
Filing date: 2018-12-24
Publication date: 2020-02-07
Anticipated expiration: 2028-12-24

Abstract

The scheme discloses an injector in the technical field of medical instruments, wherein a first nipple is arranged at one end, away from an elastic film, of a first hollow cylinder, the first nipple is communicated with one end of a three-way pipe, and a three-way switch is arranged on the three-way pipe; a second nipple is arranged at one end, close to the elastic film, of the second hollow cylinder, the outer diameter of the second nipple is equal to the inner diameter of the first nipple, a sealing film for sealing the second nipple is arranged on the second nipple, a sleeve is arranged on the second nipple in a surrounding mode, the outer side wall of the sleeve is attached to the inner wall of the first hollow cylinder and is in sliding connection with the inner wall of the second hollow cylinder, a piston is arranged in the second hollow cylinder, and a piston shaft is connected to the piston; a membrane rupturing device for puncturing the sealing membrane is arranged in the first nipple, and a plurality of through holes are formed in the membrane rupturing device. When this scheme of adoption opposition pipe patient's blood sampling not only easy operation is convenient but also can effectively reduce the patient and infect the chance, can shorten the time of using medicine when opposition pipe patient carries out the rapid injection medicine, increases the efficiency of using medicine.

Description

Syringe

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to syringe.

Background

The deep vein catheterization, artery catheterization, central vein catheterization and the like are fast and convenient to place in the periphery, the pain of patients can be relieved, the clinical application is widely realized, research and practical operation show that blood sampling samples can be obtained through the catheterization tube after 3 minutes of infusion is blocked, the inspection result is not influenced, therefore, when clinical medical staff take blood sampling samples for patients with contraposition, the blood sampling samples can be obtained through other artery or vein catheterization tubes such as subclavian vein catheterization tubes or femoral vein catheterization tubes, the existing method is that firstly, one injector is connected with the patient catheterization tube, catheter sealing liquid in the catheterization tube and blood in the patient are extracted, after the extraction is finished, the injector is taken down, then, another injector is connected with the patient catheterization tube to extract the blood in the patient, after the blood extraction is finished, the injector is pulled out, and the blood is injected into the corresponding blood sampling tube through the injector, then the syringe which draws the tube sealing liquid and the blood is connected with the tube placing catheter, the tube sealing liquid and the blood in the syringe are injected into the body of a patient, then the syringe is taken down, and finally the syringe containing the tube sealing liquid (tube flushing liquid) is connected for tube sealing.

In addition, when clinical medical personnel set up the intraductal patient intravenous route, generally will draw the medicine with the syringe, then connect patient and put the pipe, inject the medicine into the patient, at this moment, some medicine remains in patient puts the pipe, still need connect another syringe that contains tube sealing liquid (washing pipe liquid), inject this syringe, inject the medicine that will remain in putting the pipe and inject into the patient, this kind of mode of pushing away medicine is very troublesome, and involve many times disconnection and connection in the operation process, patient infection's risk has also been increased equally, the time of pushing away medicine has been increased.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a syringe that is easy to operate and reduces the risk of infection for a patient.

In order to solve the technical problem, the utility model provides a following technical scheme: a syringe comprises a first hollow cylinder, an elastic film, a second hollow cylinder and a three-way pipe, wherein the inner diameter of the first hollow cylinder is larger than the outer diameter of the second hollow cylinder, the first hollow cylinder and the second hollow cylinder are hermetically communicated through the elastic film, a first nipple is arranged at one end of the first hollow cylinder, which is far away from the elastic film, the first nipple is communicated with one end of the three-way pipe, and a three-way switch is arranged on the three-way pipe; a second nipple is arranged at one end, close to the elastic film, of the second hollow cylinder, the outer diameter of the second nipple is equal to the inner diameter of the first nipple, a sealing film for sealing the second nipple is arranged on the second nipple, a sleeve is arranged on the second nipple in a surrounding mode, the outer side wall of the sleeve is attached to the inner wall of the first hollow cylinder and is in sliding connection with the inner wall of the second hollow cylinder, a piston is arranged in the second hollow cylinder, and a piston shaft is connected to the piston; the first nipple is internally provided with a membrane rupturing device for puncturing the sealing membrane, and the membrane rupturing device is provided with a plurality of through holes.

The utility model discloses a theory of operation and beneficial effect thereof:

the syringe in the utility model is filled with tube sealing liquid (tube flushing liquid) after the manufacture or production is finished, and is disposable, when the blood sampling is needed to the patient, the second hollow tube is pushed into the first hollow tube; connecting the three-way pipe, firstly, connecting one of the rest two ends of the three-way pipe with the catheter of the patient catheter, then the other end of the three-way pipe is communicated with a blood taking needle, the blood taking needle is communicated with a blood taking pipe during blood taking, because the inner diameter of the first hollow cylinder is larger than the outer diameter of the second hollow cylinder, and the first hollow cylinder and the second hollow cylinder are hermetically communicated through the elastic film, the first nipple of the first hollow cylinder is communicated with one end of the three-way pipe, the second nipple of the second hollow cylinder is provided with a sealing membrane, the second nipple is annularly provided with a sleeve, the outer side wall of the sleeve is attached to the inner wall of the first hollow cylinder and is in sliding connection with the inner wall of the first hollow cylinder, then the three-way switch is adjusted to connect the patient tube placing catheter and the second nipple, the end of the three-way tube communicated with the blood taking needle is closed, then the second hollow cylinder is pulled to move in the first hollow cylinder, so that the catheter sealing liquid in the catheter for placing the patient and the blood in the patient body can be pumped into the first hollow cylinder through the through hole on the membrane rupture device; then adjusting a three-way switch, communicating the patient tube placing catheter with one end of the three-way pipe connected with the blood taking needle, and closing one end of the three-way pipe communicated with the first nipple, wherein the blood taking tube has negative pressure, so that the blood in the patient tube placing catheter passes through the blood taking needle and enters the blood taking tube; after blood collection is finished, the three-way switch is adjusted again, the patient tube placing guide pipe is communicated with the first nipple, the end, connected with the blood collection needle, of the patient tube placing guide pipe and the three-way pipe is closed, then the second hollow cylinder is pushed to move in the first hollow cylinder, and then the tube sealing liquid and the blood in the first hollow cylinder are pushed into the patient tube placing guide pipe to enter the body of the patient; the second nipple of the second hollow cylinder is pushed into the first nipple of the first hollow cylinder, a sealing membrane on the second nipple is punctured through a membrane breaking device on the first nipple, the second hollow cylinder is pulled after puncturing, the second hollow cylinder is pulled out of the membrane breaking device, then a piston shaft in the second hollow cylinder is pushed, and then the piston in the second hollow cylinder is pushed to move, and then tube sealing liquid (tube flushing liquid) in the second hollow cylinder is pushed into a tube placing catheter of a patient through a through hole on the membrane breaking device so as to complete tube sealing. Compared with the prior art, when the blood sampling device is used for sampling blood for a patient, the injector does not need to be replaced back and forth, disconnection or connection does not exist in the operation process, the whole process is carried out in a sealed environment, and the patient is effectively prevented from being infected in the blood sampling process.

Further, the thickness of the sealing film is 1-2 mm. It is more convenient to pierce the sealing film.

Further, the first nipple is detachably connected with the three-way pipe. The three-way pipe is more convenient to replace.

Further, the first nipple is in threaded connection with the three-way pipe. Because the threaded connection mode is firm and simple in structure, production and processing are convenient, and resources are effectively saved.

Furthermore, a blocking piece which is obliquely arranged is arranged on the end face of the other end of the second hollow cylinder, and a ratchet matched with the blocking piece is arranged on the piston shaft. Because in the production process, at first can pour into in the empty section of thick bamboo of second and seal a tub liquid (towards a tub liquid), through set up the separation blade of slope on the terminal surface of the other end of the empty section of thick bamboo of second to the epaxial ratchet with separation blade matched with that is equipped with of piston, the condition of drawing back has just so effectually prevented that the piston axle from appearing sliding and then appearing. Most importantly, when the piston shaft of the second hollow cylinder is pushed, the piston shaft only moves forward and does not move backward, so that the tube sealing with continuous positive pressure can be achieved, and the effectiveness of tube sealing of the tube placing guide tube of a patient is guaranteed.

Drawings

Fig. 1 is a schematic structural view of an injector according to the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the puncture-proof blood sampling device comprises a first hollow cylinder 1, an elastic film 2, a second hollow cylinder 3, a three-way pipe 4, a first nipple 5, a three-way switch 6, a second nipple 7, a sealing film 8, a sleeve 9, a piston 10, a piston shaft 11, a membrane rupture device 12, a through hole 13, a blood sampling needle 14, a puncture-proof blood sampling sleeve 15, a blocking piece 16, a ratchet 17 and a sealing elastic plastic film 18.

The embodiment example is shown in the attached figure 1:

a syringe comprises a first hollow cylinder 1, an elastic film 2, a second hollow cylinder 3 and a three-way pipe 4, wherein the inner diameter of the first hollow cylinder 1 is larger than the outer diameter of the second hollow cylinder 3, the first hollow cylinder 1 and the second hollow cylinder 3 are hermetically communicated through the elastic film 2, a first nipple 5 is arranged at one end, away from the elastic film 2, of the first hollow cylinder 1, the first nipple 5 is communicated with one end of the three-way pipe 4, and a three-way switch 6 is arranged on the three-way pipe 4; a second nipple 7 is arranged at one end, close to the elastic film 2, of the second hollow cylinder 3, the outer diameter of the second nipple 7 is equal to the inner diameter of the first nipple 5, a sealing film 8 for sealing the second nipple 7 is arranged on the second nipple 7, a sleeve 9 is arranged on the second nipple 7 in a surrounding mode, the outer side wall of the sleeve 9 is attached to the inner wall of the first hollow cylinder 1 and is in sliding connection with the inner wall of the second hollow cylinder 3, a piston 10 is arranged in the second hollow cylinder 3, and a piston shaft 11 is connected to the piston 10; a membrane breaking device 12 for puncturing the sealing membrane 8 is arranged in the first nipple 5, and a plurality of through holes 13 are formed in the membrane breaking device 12; the thickness of the sealing film 8 is 1 mm; the first nipple 5 is in threaded connection with the three-way pipe 4; the end face of the other end of the second hollow cylinder 3 is provided with a blocking piece 16 which is obliquely arranged, and the piston shaft 11 is provided with a ratchet 17 which is matched with the blocking piece 16.

The utility model relates to a syringe, after the preparation or production is finished, firstly, the second hollow cylinder 3 is filled with tube sealing liquid (tube flushing liquid), and the syringe is disposable, when a patient needs to be blood-sampled, the second hollow cylinder 3 is pushed into the first hollow cylinder 1, the three-way pipe 4 is connected, firstly, one end of the two remaining ends of the three-way pipe 4 is communicated with a tube placing guide pipe of the patient, then, the other end of the three-way pipe 4 is communicated with the blood sampling needle 14, the blood sampling needle 14 is connected with the puncture-proof blood sampling sleeve 15, because the inner diameter of the first hollow cylinder 1 is larger than the outer diameter of the second hollow cylinder 3, and the first hollow cylinder 1 and the second hollow cylinder 3 are hermetically communicated through the elastic film 2, the elastic film 2 and the first hollow cylinder 1 and the second hollow cylinder 3 are hermetically connected after the tube sealing liquid (tube flushing liquid) is packaged in the second hollow cylinder 3, and the first hollow cylinder 1 is communicated with one end of the three-way pipe 4, a sealing membrane 8 is arranged on a second nipple 7 of the second hollow cylinder 3, a sleeve 9 is annularly arranged on the second nipple 7, the outer side wall of the sleeve 9 is attached to the inner wall of the first hollow cylinder 1 and is in sliding connection with the inner wall of the first hollow cylinder 1, then a three-way switch 6 is adjusted to enable the patient tube placing catheter to be communicated with the second nipple 7, one end of the three-way pipe 4 communicated with a blood taking needle 14 is closed, then the second hollow cylinder 3 is pulled to move in the first hollow cylinder 1, and therefore tube sealing liquid in the patient tube placing catheter and blood in the patient can be pumped into the first hollow cylinder 1 through a through hole 13 in a membrane rupture device 12; then adjusting a three-way switch 6, communicating a tube placing conduit of a patient with one end of the three-way tube 4 connected with a blood taking needle 14, and closing one end of the three-way tube 4 communicated with the first nipple 5, wherein the blood taking tube is connected with the blood taking needle 14 through a puncture-proof blood taking sleeve 15 due to negative pressure, so that blood in the tube passes through the blood taking needle 14 and enters the blood taking tube, the three-way tube 4 and the blood taking needle 14 can be detachably connected, so that the blood taking needle 14 can be disconnected during blood taking, the blood in a hose of the blood taking needle 14 can be conveniently sucked into the puncture-proof blood taking sleeve 15 through the puncture-proof blood taking sleeve 15 under the negative pressure, and the blood waste of the; when the puncture-proof blood collection sleeve 15 is replaced, the sealing elastic plastic film 18 on the blood collection needle 14 elastically retracts, the sealing blood collection needle 14 is pointed, blood is prevented from flowing out during replacement of the puncture-proof blood collection sleeve 15, the puncture-proof blood collection sleeve 15 is pulled out after blood collection is completed, the blood collection needle 14 can be disconnected, blood in the blood collection needle 14 hose is sucked into a blood collection tube through blood collection tube negative pressure, and blood waste of a patient is reduced. Adjusting the three-way switch 6 again, communicating the patient tube placing catheter with the first nipple 5, closing one end of the patient tube placing catheter and one end of the three-way tube 4 connected with the blood taking needle 14, then pushing the second hollow tube 3 to move in the first hollow tube 1, further pushing the tube sealing liquid and the blood in the first hollow tube 1 into the patient tube placing catheter to enter the patient body, and after the tube sealing liquid and the blood in the first hollow tube 1 are pushed out; the second nipple 7 of the second hollow cylinder 3 is pushed into the first nipple 5 of the first hollow cylinder 1, a sealing membrane 8 on the second nipple 7 is punctured through a membrane breaking device 12 on the first nipple 5, the second hollow cylinder 3 is pulled after puncturing, the second hollow cylinder 3 is pulled out from the membrane breaking device 12, then a piston shaft 11 in the second hollow cylinder 3 is pushed, a piston 10 in the second hollow cylinder 3 is pushed to move, and then the tube sealing liquid in the second hollow cylinder 3 is pushed into a tube placing catheter of a patient through a through hole 13 on the membrane breaking device 12 to complete tube sealing. Compared with the prior art, when the blood sampling is carried out on the patient with the contraposition tube in the application, the injector does not need to be replaced back and forth, the disconnection or the connection does not exist in the operation process, the whole process is carried out in the sealed environment, and the patient is effectively prevented from being infected in the blood sampling process.

In the injector in the embodiment, when intravenous injection is required to be performed on a patient with the opposite tube, the three-way tube 4 and the three-way switch 6 are taken down, the needle head is connected to the first nipple 5, the second hollow tube 3 is pulled to move in the first hollow tube 1, then medicine is sucked into the first hollow tube 1, the medicine sucking step is completed, the first nipple 5 is connected with the catheter of the patient with the opposite tube, the second hollow tube 3 is pushed to move in the first hollow tube 1, and after the medicine in the first hollow tube 1 is pushed out; the second nipple 7 of the second hollow cylinder 3 is pushed into the first nipple 5 of the first hollow cylinder 1, the membrane breaking device 12 on the first nipple 5 punctures the sealing membrane 8 on the second nipple 7, the second hollow cylinder 3 is pulled after the puncture, the second hollow cylinder 3 is pulled out from the membrane breaking device 12, then the piston shaft 11 in the second hollow cylinder 3 is pushed, the piston 10 in the second hollow cylinder 3 is pushed to move, and then the tube sealing liquid (tube flushing liquid) in the second hollow cylinder 3 is pushed into the tube placing catheter of the patient through the through hole 13 on the membrane breaking device 12 to complete tube sealing. Compared with the prior art, when the intravenous injection is carried out on the patient with the contraposition tube in the application, the injector does not need to be replaced back and forth, the disconnection or the connection does not exist in the operation process, the whole course is carried out in a sealed environment, the risk that the patient is infected in the intravenous injection process is effectively avoided, and the injection pushing time is shortened.

Claims

1. A syringe, characterized by: the three-way pipe comprises a first hollow cylinder, an elastic film, a second hollow cylinder and a three-way pipe, wherein the inner diameter of the first hollow cylinder is larger than the outer diameter of the second hollow cylinder, the first hollow cylinder and the second hollow cylinder are hermetically communicated through the elastic film, a first nipple is arranged at one end of the first hollow cylinder, which is far away from the elastic film, the first nipple is communicated with one end of the three-way pipe, and a three-way switch is arranged on the three-way pipe; a second nipple is arranged at one end, close to the elastic film, of the second hollow cylinder, the outer diameter of the second nipple is equal to the inner diameter of the first nipple, a sealing film for sealing the second nipple is arranged on the second nipple, a sleeve is arranged on the second nipple in a surrounding mode, the outer side wall of the sleeve is attached to the inner wall of the first hollow cylinder and is in sliding connection with the inner wall of the second hollow cylinder, a piston is arranged in the second hollow cylinder, and a piston shaft is connected to the piston; the first nipple is internally provided with a membrane rupturing device for puncturing the sealing membrane, and the membrane rupturing device is provided with a plurality of through holes.

2. The syringe of claim 1, wherein: the thickness of the sealing film is 1-2 mm.

3. The syringe of claim 2, wherein: the first nipple is detachably connected with the three-way pipe.

4. The syringe of claim 3, wherein: the first nipple is in threaded connection with the three-way pipe.

5. The syringe of claim 4, wherein: the end face of the other end of the second hollow cylinder is provided with a blocking piece which is obliquely arranged, and the piston shaft is provided with a ratchet matched with the blocking piece.