CN210144675U - A negative pressure amniotic fluid collection device - Google Patents

Abstract

The utility model discloses a negative pressure type amniotic fluid collection device, which comprises: a puncture needle assembly and a puncture collection assembly; the puncture needle assembly includes a needle tube provided with a liquid suction chamber; Reinforcement part, liquid pumping part; the reinforcing part includes a needle core that can extend into the liquid suction chamber, and the needle core is detachably connected with the needle tube, so that the reinforcement part is connected with the puncture needle assembly to form a puncture state; the liquid pumping part includes a collection tube, The collection tube is detachably connected with the needle tube, so that a liquid suction state is formed when the liquid suction part is connected with the puncture needle assembly. The utility model cooperates with a needle core in the needle tube, which makes it easier to puncture the abdominal wall and uterine wall; the negative pressure collecting tube can automatically collect amniotic fluid, making the operator more relaxed. The negative pressure collection tube can be directly used for amniotic fluid centrifugation without transferring from a syringe to a test tube, reducing the possibility of amniotic fluid sample contamination. It has a simple structure, convenient operation, improved surgical safety, good use effect, and is economical and durable.

Description

A negative pressure amniotic fluid collection device

technical field

The utility model relates to the technical field of medical devices, in particular to a negative pressure amniotic fluid collection device.

Background technique

Amniocentesis is a method of prenatal diagnosis. It is generally suitable for prenatal diagnosis of second trimester pregnancy. The best time for puncture and amniotic fluid extraction for prenatal diagnosis is 16 to 20 weeks of gestation. The amniotic fluid is extracted by needle puncture to obtain fetal viable cells in the amniotic fluid, which can be used for preparation, staining, fetal karyotype analysis, chromosomal genetic disease diagnosis and For gender determination, amniocyte DNA can also be used to diagnose genetic diseases and metabolic diseases. Determination of alpha-fetoprotein in amniotic fluid can also diagnose fetal open neural tube defects. In the third trimester of pregnancy, amniocentesis can determine blood type, bilirubin, lecithin, sphingomyelin, placental prolactin, etc., to understand whether there is blood group incompatibility between mother and child, hemolysis, fetal lung maturity, skin maturity, placental function, etc. At present, the method of collecting amniotic fluid is to use a syringe and puncture to extract 20 milliliters of amniotic fluid in the uterus. Because the puncture needle is relatively long and has a thin lumen, the pressure of amniotic fluid samples is not easy to grasp and unstable, and the puncture needle is easy to swing up and down. The patient is painful and prone to rupture and leakage of the amniotic membrane leading to fetal miscarriage. Among them, the patent title is "negative pressure test tube amniocentesis device" (publication number: CN208404638U) and the patent title is "amniocentesis amniotic fluid collection device" (publication number: CN203776941U) Chinese patents, both disclose the use of negative pressure test tubes to collect amniotic fluid , saves the trouble of manual suction with a syringe, which can reduce the workload of medical staff and reduce the labor intensity of medical staff, but the amniotic fluid needs to be transferred to the test tube separately, which is convenient for centrifugation and increases the secondary pollution of amniotic fluid. possible. The Chinese patent whose patent name is "vacuum blood collection test tube" (publication number: CN204072113U) discloses the use of a vacuum tube for liquid collection, and by controlling the opening or closing of the valve to control the air entering the test tube body, the air pressure of the vacuum collection test tube can be effectively controlled, The operation is difficult, and the requirements for the surgeon are high.

Utility model content

The technical problem to be solved by the utility model is to provide a negative pressure amniotic fluid collection device which is convenient to operate.

The solution of the utility model to solve the technical problem is as follows: a negative pressure amniotic fluid collection device, comprising: a puncture needle assembly and a puncture collection assembly; The needle port end, the back end of the needle tube is the liquid outlet end; the puncture collection assembly: including a reinforcing piece and a liquid suction piece, and the reinforcing piece and the liquid suction piece are all detachably connected with the puncture needle assembly; The needle core extending into the liquid extraction cavity, the needle core and the needle tube are detachably connected, so that the reinforcing member is connected to the puncture needle assembly to form a puncture state; the liquid suction member includes a collection tube, and the head end of the collection tube is The liquid inlet end, the end of the collection tube is the liquid delivery end, and the liquid inlet end of the collection tube is detachably connected to the liquid outlet end of the needle tube, so that the liquid suction state is formed when the liquid suction member is connected to the puncture needle assembly.

As a further improvement of the above technical solution, the puncture needle assembly further includes a needle base located at the liquid outlet end of the needle tube, the needle core includes a needle core head, the head end of the collection tube is provided with a first connector, and the needle head The seat can be detachably connected with the needle core head and the first connecting head respectively.

As a further improvement of the above technical solution, the first connector is threadedly connected to the needle base.

As a further improvement of the above technical solution, an insertion scale is provided on the outer wall of the needle tube, and the puncture needle assembly further includes a scale mark slider sleeved on the outer wall of the needle tube.

As a further improvement of the above technical solution, the puncture needle assembly further includes a protection tube, and the protection tube is sleeved on the outer side of the scale mark slider and the needle tube.

As a further improvement of the above technical solution, the liquid suction member further includes a liquid guide and a negative pressure collection tube, the liquid guide includes an inflow end and an outflow end that are connected, and the inflow end of the liquid guide is connected to the collection tube. The liquid feeding end of the liquid guide is detachably connected, and the outflow end of the liquid guide is connected with the negative pressure collecting pipe.

As a further improvement of the above technical solution, the liquid-feeding end of the collection tube is provided with a second connection head, the second connection head is provided with a cone head sleeve, and the liquid guide includes a cone head provided with a liquid contact port, so The cone head and the cone head sleeve are detachably connected.

As a further improvement of the above technical solution, the liquid catheter further includes a connecting pipe, the connecting pipe is connected with the cone head, the connecting pipe is connected with a puncture needle, and there are two negative pressure collecting pipes, so The mouth of the negative pressure collection tube is provided with a sealing rubber plug, and two puncture needles pierce the sealing rubber plug and extend into the negative pressure collection tube.

As a further improvement of the above technical solution, the outer wall of the negative pressure collecting tube is provided with a capacity scale along its length direction.

As a further improvement of the above technical solution, a flow stop clip is also included, and the flow stop clip is clamped on the collection tube.

The beneficial effects of the utility model are as follows: the utility model uses a needle core in the needle tube, which makes it easier to puncture the abdominal wall and the uterine wall; the negative pressure collecting tube can automatically collect amniotic fluid, which makes the operator easier. The negative pressure collection tube can be directly used for centrifugation of amniotic fluid without transferring it from a syringe to a test tube, which reduces the possibility of contamination of amniotic fluid samples.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings that are used in the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, but not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings according to these drawings without creative work.

Figure 1 is a schematic structural diagram of the present invention.

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, those skilled in the art can obtain other embodiments without creative work, All belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned in the text do not mean that the components are directly connected, but refer to a better coupling structure by adding or reducing coupling accessories according to specific implementation conditions. Various technical features in the present invention can be combined interactively on the premise of not contradicting each other.

Referring to FIG. 1, a negative pressure amniotic fluid collection device includes: a puncture needle assembly, a puncture collection assembly; The rear end of the needle tube 11 is the liquid outlet end; the puncture and collection assembly: includes a reinforcing member and a liquid suction member, and the reinforcing member and the liquid suction member are detachably connected to the puncture needle assembly; The needle core 21 inside, the needle core 21 is detachably connected with the needle tube 11, so that the reinforcing member is connected to the puncture needle assembly to form a puncture state; the liquid suction part: includes a collection tube 22, and the head end of the collection tube 22 is The liquid inlet end, the end of the collection tube 22 is the liquid delivery end, and the liquid inlet end of the collection tube 22 is detachably connected to the liquid outlet end of the needle tube 11, so that the liquid suction is formed when the liquid suction member is connected with the puncture needle assembly. state. On the one hand, when medical staff perform amniocentesis for pregnant women to extract amniotic fluid, since the needle tube 11 is hollow, it is difficult to puncture the needle tube 11 alone. At this time, the needle core 21 is consistent with the puncture site of the needle tube 11. The needle core 21 cooperates with the needle tube 11 to perform amniocentesis. After the puncture is successful, the needle core 21 is pulled out, and the liquid outlet end of the needle tube 11 is connected to the collection tube 22. On the liquid inlet end, the end of the collection tube 22 is the liquid delivery end; on the other hand, the collection tube 22 and the needle tube 11 are detachable, which makes assembly and disassembly convenient, and the utility model has strong practicability and good use effect.

As a further preferred embodiment, the puncture needle assembly further includes a needle base 12 disposed at the liquid outlet end of the needle tube 11 , the needle core 21 includes a needle core head 211 , and the first end of the collection tube 22 is provided with a first connector. 221, the needle holder 12 can be detachably connected with the needle core head 211 and the first connecting head 221 respectively. The needle tube 11 is hollow, the needle core 21 can be sheathed in the needle tube 11, and the needle core 21 cooperates with the needle tube 11 to perform amniocentesis. The needle core head 211 is provided to facilitate handling of the needle core 21. The upper end of the needle head seat 12 is provided with a groove, and the needle core head 211 is provided with a clamping block. fixed on the needle tube 11. After the puncture is successful, the needle core 21 is pulled out. Since the first connector 221 is provided at the head end of the collection tube 22 , the first connector 221 is connected to the needle base 12 to connect the needle tube 11 and the collection tube 22 .

As a further preferred embodiment, the first connector 221 is connected with the needle base 12 by screw thread. The outer wall of the first connector 221 is provided with an external thread, and the inner wall of the needle holder 12 is provided with an internal thread that engages with the external thread. The detachable connection between the first connector 221 and the needle holder 12 can be realized.

As a further preferred embodiment, an insertion scale is provided on the outer wall of the needle tube 11 , and the puncture needle assembly further includes a scale mark slider 13 sleeved on the outer wall of the needle tube 11 . When performing puncture surgery, pregnant women with indications should do B-ultrasound first to determine the location of the placenta, the condition of the fetus, and the depth of the puncture to avoid accidental injury to the placenta. Since there are insertion scales on the outer wall of the needle tube 11, the distance between each scale is 1CM. After confirming the depth of the puncture, slide the scale mark slider 13 to the corresponding scale. After selecting the needle insertion point, sterilize the skin and spread a sterile towel , use the needle tube 11 with the needle core 21 to pierce vertically at the selected point, and determine the depth of the puncture according to the scale mark slider 13 on the needle tube 11 .

As a further preferred embodiment, the puncture needle assembly further includes a protection tube 14 , and the protection tube 14 is sleeved on the outside of the scale mark slider 13 and the needle tube 11 . Before the puncture needle assembly is used, the needle tube 11 is provided with a protective tube 14 to ensure that before the needle tube 11 is used, the puncture needle 1 will not pierce the packaging bag due to its movement in the packaging bag, thereby causing the puncture needle assembly to be contaminated or puncture. The exposed sharp part of the needle assembly can cause injury to people.

Further as a preferred embodiment, the liquid suction member also includes a liquid guide and a negative pressure collection tube 23, the liquid guide includes an inflow end and an outflow end that are connected, and the inflow end of the liquid guide is connected to the collection tube. The liquid feeding end of 22 is detachably connected, and the outflow end of the liquid guide is connected to the negative pressure collecting pipe 23 . The inflow end of the liquid guide is connected to the liquid feeding end of the collection tube 22, and the outflow end of the liquid guide is connected to the negative pressure collection tube 23, so that the negative pressure formed inside the negative pressure collection tube 23 can be used to automatically The amniotic fluid in the amniotic cavity of pregnant women is sucked out into the negative pressure collection tube 23 through the needle tube 11, the collection tube 22 and the catheter for storage, which saves the trouble of manual suction with a syringe and reduces the workload of medical staff. And reduce the labor intensity of medical staff, so that the extraction rate can be greatly improved.

Further as a preferred embodiment, the liquid-feeding end of the collection tube 22 is provided with a second connecting head 222, the second connecting head 222 is provided with a conical head cover, and the liquid guide includes a conical head provided with a liquid-contacting port. 241, the cone head 241 is detachably connected with the cone head sleeve. The second connecting head 222 is formed into a conical table-like structure, and the outer wall of the second connecting head 222 is provided with anti-separation lines. The tube plug puncture needle is provided with a hollow conical head 241, the shape of the conical head 241 is the same as that of the second connecting head 222. The inner wall of the cone head 241 is also provided with anti-separation lines, so that the second connector 222 is inserted into the cone head 241 and is not easily loosened.

As a further preferred embodiment, the catheter further includes a connecting pipe 242, the connecting pipe 242 is communicated with the cone head 241, the connecting pipe 242 is connected with a puncture needle 243, and the negative pressure collecting pipe 23 There are two, the mouth of the negative pressure collection tube 23 is provided with a sealing rubber plug, and the two puncture needles 243 pierce the sealing rubber plug and extend into the negative pressure collection tube 23 . The connecting pipe 242 communicates with the conical head 241, and the connecting pipe 242 is connected with a puncture needle 243. The conical head 241, the connecting pipe 242 and the puncturing needle 243 form a liquid catheter. The existing method for collecting amniotic fluid generally needs to collect 20 milliliters of amniotic fluid. In the existing negative pressure amniotic fluid collection device, the negative pressure collecting tube 23 is generally 10 ml, and the collection is divided into two negative pressure collecting tubes 23. After the negative pressure collection tube 23 is fully collected, pull out the negative pressure collection tube 23 that collected the amniotic fluid, and then insert another negative pressure collection tube 23 into the puncture needle 243. When replacing the negative pressure collection tube 23, there may be a The problem of causing damage to fetal and maternal tissues by shaking the needle tip. In one embodiment, one end of the cone head 241 is connected to the collection tube 22, the other end of the cone head 241 is connected to the connection tube 242, and the connection tube 242 is connected with a puncture tube needle 243, which is inserted into two corresponding 10ml The negative pressure collection tube 23, the two negative pressure collection tubes 23 can automatically attract 20ml of amniotic fluid, which makes the operation of the medical staff easier. The negative pressure collection tube 23 can be directly used for centrifugation of amniotic fluid without transferring it from a syringe to a test tube, reducing the possibility of contamination of amniotic fluid samples. Since two negative pressure collection tubes 23 are connected at the same time, two amniotic fluid collections are completed in one operation.

As a further preferred embodiment, the outer wall of the negative pressure collecting tube 23 is provided with a capacity scale along its length direction. Because the tube body of the negative pressure collection tube 23 is made of transparent plastic material, and the outer wall is provided with a volume scale, so, by comparing the volume scale, it is convenient for medical staff to refer to and control the amount of amniotic fluid to be extracted.

As a further preferred embodiment, a flow stop clip 3 is also included, and the flow stop clip 3 is clamped on the collection tube 22 . Before use, the collection tube 22 is clamped by the stop clip 3, and the collection tube 22, the liquid guide and the negative pressure collection tube 23 are connected. During use, the medical staff holds the medical ultrasound probe in one hand, and the other hand holds the needle sleeve provided with the needle. The needle tube 11 of the core 21 is subjected to amniocentesis. After the puncture is completed, the needle core 21 is pulled out, the first connector 221 is connected to the needle base 12, and the flow stop clip 5 is released, so that the needle tube 11 can pass through the collection tube 22. , The liquid catheter is communicated with the negative pressure collection tube 23, and the negative pressure formed inside the negative pressure collection tube 23 can automatically suck the amniotic fluid in the amniotic cavity of pregnant women through the needle tube 11, the collection tube 22, and the liquid catheter. It is stored in the negative pressure collection tube 23 . At the same time, the collection tube 22 is equipped with a stop clip 3. When the fetus moves to the vicinity of the needle of the needle tube 11, the stop clip 3 can be clamped to quickly relieve the negative pressure, preventing the fetal tissue from being sucked and damaging the fetus.

When using the utility model, during the puncture operation, the pregnant woman with indications should do B-ultrasound first to determine the position of the placenta, the condition of the fetus, and the depth of the puncture to avoid accidental injury to the placenta. After confirming the depth of the puncture, slide the scale mark slider 13. On the corresponding scale, after selecting the needle insertion point, sterilize the skin, spread a sterile towel, and use the needle tube 11 with the needle core 21 to pierce vertically at the selected point, according to the scale mark slider 13 on the needle tube 11. Determine the depth of the puncture. Before puncturing, the collection tube 22 is clamped by the stop clip 3, and the collection tube 22 is connected with the catheter. The catheter is inserted into the corresponding two 10ml negative pressure collection tubes 23 through the puncture tube needle 243; When the needle tube 11 passes through the abdominal wall and the uterine wall, there is a feeling of falling twice. After the puncture is successful, the needle core 21 is pulled out, and the collection tube 22 is connected with the needle tube 11 through screw connection; Through the negative pressure formed inside the negative pressure collection tube 23, the amniotic fluid in the amniotic cavity of pregnant women can be automatically sucked out into two 10ml negative pressure collection tubes 23 through the needle tube 11, the collection tube 22, and the catheter for storage. The medical staff judges the amount of amniotic fluid extracted according to the volume scale on the outer wall of the negative pressure collection tube 23, when the amniotic fluid collection volume reaches 20ml, close the stop clip 3, then insert the needle core 21 to take out the needle tube 11, cover with sterile gauze, and press 2 - 3 minutes, pregnant women rest in bed for 2 hours.

The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or variations without departing from the spirit of the present invention. Alternatives, these equivalent modifications or substitutions are all included within the scope defined by the claims of the present application.

Claims (7)

1. A negative pressure amniotic fluid collection device, characterized in that, comprising: a puncture needle assembly, a puncture collection assembly; Puncture needle assembly: It comprises a needle tube (11) provided with a liquid extraction cavity, the front end of the needle tube (11) is the needle port end, and the rear end of the needle tube (11) is the liquid outlet end; Puncture collection components: It includes a reinforcing piece and a liquid suction piece, and the reinforcing piece and the liquid suction piece are all detachably connected with the puncture needle assembly; Reinforcement: It comprises a needle core (21) that can be inserted into the liquid extraction cavity, and the needle core (21) is detachably connected to the needle tube (11), so that a puncture state is formed when the reinforcing member is connected to the puncture needle assembly; Pumping parts: A collection tube (22) is included, the head end of the collection tube (22) is the liquid inlet end, the end of the collection tube (22) is the liquid feeding end, and the liquid inlet end of the collection tube (22) is connected to the needle tube ( 11) The liquid outlet end is detachably connected, so that a liquid suction state is formed when the liquid suction part is connected with the puncture needle assembly; It includes an inflow end and an outflow end that communicate with each other, the inflow end of the liquid guide is detachably connected to the liquid feeding end of the collection tube (22), and the outflow end of the liquid guide is connected to the negative pressure collection tube (23) The liquid-feeding end of the collection tube (22) is provided with a second connecting head (222), the second connecting head (222) is provided with a conical head cover, and the liquid guide comprises a conical head provided with a liquid contact port (241), the cone head (241) is detachably connected to the cone head sleeve; the liquid guide further comprises a connection pipe (242), the connection pipe (242) communicates with the cone head (241), and the connection The tube (242) is communicated with a puncture tube needle (243), the negative pressure collection tube (23) has two, the mouth of the negative pressure collection tube (23) is provided with a sealing rubber plug, and the two puncture tubes The needle (243) pierces the sealant plug and extends into the negative pressure collection tube (23). 2 . The negative pressure amniotic fluid collection device according to claim 1 , wherein the puncture needle assembly further comprises a needle seat ( 12 ) disposed at the liquid outlet end of the needle tube ( 11 ), and the needle core ( 21 ). 3 . ) comprises a needle core head (211), the head end of the collection tube (22) is provided with a first connecting head (221), and the needle head seat (12) can be respectively connected with the needle core head (211) and the first connecting head (221) Detachable connection. 3 . The negative pressure amniotic fluid collection device according to claim 2 , wherein the first connector ( 221 ) is threadedly connected to the needle seat ( 12 ). 4 . 4. A negative pressure amniotic fluid collection device according to claim 3, characterized in that: an insertion scale is provided on the outer wall of the needle tube (11), and the puncture needle assembly further comprises a needle tube (11) sleeved on The scale mark slider (13) on the outer wall. 5. The negative pressure amniotic fluid collection device according to claim 4, wherein the puncture needle assembly further comprises a protection tube (14), and the protection tube (14) is sleeved on the scale mark slider (14). 13), the outer side of the needle tube (11). 6 . The negative pressure amniotic fluid collection device according to claim 1 , wherein the outer wall of the negative pressure collecting tube ( 23 ) is provided with a volume scale along its length direction. 7 . 7. A negative pressure amniotic fluid collection device according to any one of claims 1-6, characterized in that: it further comprises a flow stop clip (3), and the flow stop clip (3) is clamped on the collection tube (3). 22) on.

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