Disposable artificial membrane rupture sampler
By designing a disposable artificial rupture sampler including an external protective case, a hollow needle tube and a pressing head, the problem of manual rupture and amniotic fluid sampling in the prior art is solved, and the problem of incorrect injury and infection risks in the prior art is achieved, efficient and safe rupture and amniotic fluid sampling under single operation is achieved.
Patent Information
- Application Number
- CN202421791721.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-27
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-27
AI Technical Summary
The prior art lacks special tools for artificial membrane rupture and amniotic fluid sampling, which is troublesome and has the risk of accidental injury and infection.
A disposable artificial rupture sampler is designed, including an external protective case, a hollow needle tube and a pressing head, which can achieve safe and efficient rupture and amniotic fluid sampling through a rupture puncture needle and locking structure.
It realizes efficient and safe membrane rupture and amniotic fluid sampling under single operation, reduces the risk of accidental injury and infection, and ensures hygiene of use.
Smart Images
Figure CN223026085U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to medical supplies, in particular to a disposable artificial membrane rupture sampler. Background Art
[0002] In obstetric clinical work, artificial membrane rupture is often required, that is, the amniotic membrane at the cervical orifice is torn by artificial means to observe the color of amniotic fluid, strengthen uterine contractions, and accelerate the progress of labor. For individual cases, amniotic fluid sampling is also required.
[0003] However, in the existing artificial membrane rupture work, there is a lack of special tools. Generally, hemostatic forceps, syringe needles, and cotton swab sticks are used in combination for membrane rupture. During operation, the hemostatic forceps are used to tear the fetal membrane, and the fingers are used to expand the rupture opening. Then, the syringe needle is used for membrane rupture, and the cotton swab stick is used for auxiliary wiping. However, when using this method for artificial membrane rupture, multiple people need to cooperate. One person fixes the vagina with one hand and operates the hemostatic forceps with the other hand, and others operate the syringe needle for membrane rupture and the cotton swab stick for assistance. The operation is troublesome. At the same time, there is a possibility of accidentally clamping the cervical tissue when operating the hemostatic forceps. The syringe needle may stab the operator or be stabbed by the operator during membrane rupture, which will increase the infection probability. The cotton swab stick also has the possibility of being contaminated during the membrane rupture process, and the hygiene level is insufficient. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide a disposable artificial membrane rupture sampler, which can smoothly and efficiently perform artificial membrane rupture, can perform amniotic fluid sampling as needed, will not cause accidental injury during the whole process, and is hygienic to use.
[0005] In order to solve the above technical problems, the following technical solutions are adopted:
[0006] A disposable artificial membrane rupture sampler, characterized by comprising an external protective shell, a hollow needle tube, and a pressing head. The external protective shell is provided with an inner cavity. The front end of the external protective shell is provided with a puncture hole communicating with the inner cavity. A thin film covering the puncture hole is provided on the puncture hole. The rear end of the external protective shell is provided with a through hole communicating with the inner cavity. The front end of the hollow needle tube is provided with a membrane rupture puncture needle. The hollow needle tube is movably arranged back and forth in the inner cavity of the external protective shell, and the membrane rupture puncture needle is located behind the thin film. The rear end of the hollow needle tube extends out of the through hole. The pressing head is detachably connected to the rear end of the hollow needle tube and covers the rear end opening of the hollow needle tube. A rebound structure is provided at the front part of the hollow needle tube, and a locking structure is provided between the rear part of the hollow needle tube and the external protective shell.
[0007] When the above-mentioned disposable artificial membrane rupture sampler is used for membrane rupture, medical staff can hold the outer protective shell by hand and guide it to the most prominent part of the fetal membrane bulge. At this time, the membrane rupture puncture needle has not yet protruded from the puncture hole, and the outer protective shell will not accidentally injure the human body. After exploring the distance between the fetal membrane and the presenting part of the fetus, only when it is at a safe distance and when it is suitable for membrane rupture, press the pressing head with the thumb, and the membrane rupture puncture needle can pierce through the film and protrude from the puncture hole to puncture the fetal membrane. And the position of the hollow needle tube is fixed through the locking structure, and the membrane rupture puncture needle will not retract. If it is necessary to aspirate amniotic fluid for sampling and explore the properties of the amniotic fluid, etc., the pressing head can be taken out from the rear end of the hollow needle tube, and negative pressure can be formed to draw the amniotic fluid into the hollow needle tube. After the membrane rupture and sampling are completed, the membrane rupture puncture needle can be retracted into the inner cavity of the outer protective shell through the elastic return structure, avoiding accidental injury and the accidental injury and infection caused by the disposal of medical waste. This disposable artificial membrane rupture sampler only requires one person to complete membrane rupture and sampling during use. Its operation is simple and efficient, does not require special training to operate, and can ensure hygiene during use, and there is no possibility of infection.
[0008] In a preferred embodiment, the elastic return structure includes a pressure ring and a compression spring. The pressure ring is arranged at the front end of the hollow needle tube. A limiting step is provided at the front end of the inner cavity of the outer protective shell. The compression spring is sleeved on the hollow needle tube, and the front end of the compression spring is connected to the limiting step, and the rear end of the compression spring is connected to the pressure ring.
[0009] In a further preferred embodiment, the locking structure includes a clamping ring and at least one clamping strip. The clamping ring is arranged on the outer protective shell. A first through hole for the hollow needle tube to pass through is opened in the middle of the clamping ring. At least one groove is provided on the first through hole. The number of grooves is the same as that of the clamping strips and they correspond one by one. The clamping strips are arranged on the hollow needle tube along the length direction of the hollow needle tube. When membrane rupture is required, the hollow needle tube is pushed forward by pressing the pressing head, and the clamping strips move along the grooves accordingly. When the rear end of the clamping strip passes through the clamping ring, only by slightly rotating the hollow needle tube, the clamping strip and the groove can be staggered. At this time, release the pressing head, and under the action of the compression spring, the clamping strip contacts the front side wall of the clamping ring to keep the membrane rupture puncture needle in the protruding state. When use is completed, only by rotating the hollow needle tube again to make the positions of the clamping strip and the groove correspond again, the hollow needle tube can be reset under the action of the compression spring, and the membrane rupture puncture needle can be retracted into the inner cavity of the outer protective shell.
[0010] In another further preferred solution, the locking structure includes an elastic piece and a second through hole opened at the rear end of the side wall of the outer protective shell. One end of the elastic piece is connected to the rear end of the hollow needle tube, and the other end of the elastic piece is provided with a convex block matching the second through hole. When membrane puncture is required, the hollow needle tube is pushed forward by pressing the pressing head. At this time, the convex block first moves along the side wall of the inner cavity of the outer protective shell. When the convex block moves to a position corresponding to the second through hole, the convex block can extend into the second through hole, thereby limiting the hollow needle tube and keeping the membrane puncture needle tip in a protruding state. After use, only need to press the convex block to make the convex block retract from the second through hole back into the inner cavity of the outer protective shell. At this time, the hollow needle tube can be reset under the action of the compression spring, and the membrane puncture needle tip retracts into the inner cavity of the outer protective shell.
[0011] In a preferred solution, an annular step is provided at the rear end of the hollow needle tube, and the pressing head is detachably arranged on the annular step. The provision of the annular step makes it more convenient to draw amniotic fluid into the hollow needle tube by pulling the pressing head backward to form a negative pressure when amniotic fluid sampling is required. At the same time, it can also increase the pressing area and facilitate pressing.
[0012] In a further preferred solution, the pressing head is made of silica gel. The pressing head made of silica gel can also keep in contact with the annular step when pulled backward, without leakage, can better control the extraction volume, and ensure hygiene.
[0013] In a preferred solution, the outer protective shell is tubular; the channel extending from the front to the rear of the outer protective shell constitutes the inner cavity, the front end opening of the channel constitutes the puncture hole, and the rear end opening of the channel constitutes the through hole.
[0014] In a further preferred solution, the front end of the outer protective shell gradually inclines toward the middle from the rear to the front. Through this setting, the front end of the outer protective shell is arc-shaped, which can avoid scratching the operator or being scratched by the operator.
[0015] In a preferred solution, both the outer protective shell and the hollow needle tube are made of colorless and transparent plastic. With this structure, the outer protective shell and the hollow needle tube are not easily damaged, and the sampling situation can be observed during sampling.
[0016] In a preferred solution, the length of the disposable artificial membrane puncture sampler is 8 - 12 cm and the diameter is 4 - 8 mm.
[0017] The beneficial effect of the present utility model is that this disposable artificial membrane puncture sampler can smoothly and efficiently perform artificial membrane puncture and can perform amniotic fluid sampling as needed. The whole process will not cause accidental injury and is hygienic to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1It is a schematic structural diagram of the disposable artificial membrane rupture sampler in Embodiment 1 of the present utility model;
[0019] Figure 2 It is a schematic structural diagram of the position where the hollow needle tube in Embodiment 1 of the present utility model is provided with a clamping strip;
[0020] Figure 3 It is a schematic structural diagram of the clamping ring in Embodiment 1 of the present utility model;
[0021] Figure 4 It is a schematic structural diagram of the position of the outer protective shell and the rear end of the hollow needle tube in Embodiment 2 of the present utility model. Detailed implementation manners
[0022] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0023] Embodiment 1
[0024] As Figures 1 - 3 shown, the disposable artificial membrane rupture sampler includes an outer protective shell 1, a hollow needle tube 2 and a pressing head 3. The outer protective shell 1 is provided with an inner cavity 101 and is tubular. The channel extending from the front to the rear of the outer protective shell 1 forms the inner cavity 101. The front opening of the channel forms a puncture hole 102, and the rear opening of the channel forms a through hole 103. A film 4 covering the puncture hole 102 is provided on the puncture hole 102. The front end of the hollow needle tube 2 is provided with a membrane rupture puncture needle 5. The hollow needle tube 2 is movably arranged back and forth in the inner cavity 101 of the outer protective shell 1, and the membrane rupture puncture needle 5 is located behind the film 4. The rear end of the hollow needle tube 2 extends out of the through hole 103. The pressing head 3 is detachably connected to the rear end of the hollow needle tube 2 and covers the rear end opening of the hollow needle tube 2. A rebound structure 6 is provided at the front part of the hollow needle tube 2, and a locking structure 7 is provided between the rear part of the hollow needle tube 2 and the outer protective shell 1.
[0025] When the above-mentioned disposable artificial membrane rupture sampler is used for membrane rupture, medical staff can hold the outer protective shell 1 by hand and guide it to the most prominent part of the fetal membrane bulge. At this time, the membrane rupture puncture needle 5 has not extended out of the puncture hole 102, and the outer protective shell 1 will not accidentally injure the human body; after exploring the distance between the fetal membrane and the presenting part of the fetus, only press the pressing head 3 with the thumb at a safe distance to fix it when it is suitable for membrane rupture, and the membrane rupture puncture needle 5 can pierce through the thin film 4 and extend out of the puncture hole 102 to puncture the fetal membrane; and the position of the hollow needle tube 2 is fixed through the locking structure 7, and the membrane rupture puncture needle 5 will not retract. If it is necessary to aspirate amniotic fluid for sampling and explore the properties of the amniotic fluid, etc., the pressing head 3 can be taken out from the rear end of the hollow needle tube 2, and negative pressure can be formed to draw the amniotic fluid into the hollow needle tube 2; after the membrane rupture and sampling are completed, the membrane rupture puncture needle 5 can be retracted into the inner cavity 101 of the outer protective shell 1 through the elastic return structure 6 to avoid accidental injury and the accidental injury and infection caused by the disposal of medical waste. This disposable artificial membrane rupture sampler only requires one person to complete membrane rupture and sampling during use. Its operation is simple and efficient, and it can be operated without special training. Moreover, it can ensure hygiene during use and there is no possibility of infection.
[0026] The elastic return structure 6 includes a pressure ring 601 and a compression spring 602. The pressure ring 601 is arranged at the front end of the hollow needle tube 2. A limit step 104 is provided at the front end of the inner cavity 101 of the outer protective shell 1. The compression spring 602 is sleeved on the hollow needle tube 2, and the front end of the compression spring 602 is connected to the limit step 104, and the rear end of the compression spring 602 is connected to the pressure ring 601.
[0027] The locking structure 7 includes a clamping ring 701 and a plurality of clamping strips 702. The clamping ring 701 is arranged on the outer protective shell 1. A first through hole 7011 for the hollow needle tube 2 to pass through is opened in the middle of the clamping ring 701. A plurality of grooves 7012 are provided on the first through hole 7011, and the grooves 7012 correspond to the clamping strips 702 one by one. The clamping strips 702 are arranged on the hollow needle tube 2 along the length direction of the hollow needle tube 2. When membrane rupture is required, the hollow needle tube 2 is pushed forward by pressing the pressing head 3, and the clamping strip 702 moves along the groove 7012 accordingly. When the rear end of the clamping strip 702 passes through the clamping ring 701, only rotate the hollow needle tube 2 slightly, and the clamping strip 702 and the groove 7012 can be staggered. At this time, release the pressing head 3, and under the action of the compression spring 602, the clamping strip 702 contacts the front side wall of the clamping ring 701 to keep the state of the membrane rupture puncture needle 5 extending out; when use is completed, only rotate the hollow needle tube 2 again to make the positions of the clamping strip 702 and the groove 7012 correspond again, and the hollow needle tube 2 can be reset under the action of the compression spring 602 to retract the membrane rupture puncture needle 5 into the inner cavity 101 of the outer protective shell 1.
[0028] At the rear end of the hollow syringe 2, there is an annular step 201, and the pressing head 3 is detachably arranged on the annular step 201. The setting of the annular step 201 makes it more convenient to draw amniotic fluid when amniotic fluid sampling is needed. By pulling the pressing head 3 backward, negative pressure is formed to draw the amniotic fluid into the hollow syringe 2. At the same time, it can also increase the pressing area for easy pressing.
[0029] The pressing head 3 is made of silica gel. The pressing head 3 made of silica gel can also keep in contact with the annular step 201 when pulled backward, without leakage, can better control the extraction volume, and ensure hygiene.
[0030] The front end of the outer protective shell 1 gradually inclines towards the middle from back to front. Through this setting, the front end of the outer protective shell 1 is arc-shaped, which can avoid scratching the operator or being scratched by the operator.
[0031] Both the outer protective shell 1 and the hollow syringe 2 are made of colorless and transparent plastic. With this structure, the outer protective shell 1 and the hollow syringe 2 are not easily damaged, and the sampling situation can be observed during sampling.
[0032] The length of the disposable artificial rupture of membranes sampler is 10 cm and the diameter is 5 mm.
[0033] Embodiment 2
[0034] The difference between this embodiment and Embodiment 1 is that as Figure 4 shown, the locking structure 7' includes a spring piece 701' and a second through hole 702' opened on the rear end side wall of the outer protective shell 1'. One end of the spring piece 701' is connected to the rear end of the hollow syringe 2', and the other end of the spring piece 701' is provided with a convex block 7011' that matches the second through hole 702'. When membrane rupture is needed, by pressing the pressing head to push the hollow syringe 2' forward, at this time, the convex block 7011' first moves along the side wall of the inner cavity of the outer protective shell 1'. When the convex block 7011' moves to a position corresponding to the second through hole 702', the convex block 7011' can extend into the second through hole 702', thereby limiting the hollow syringe 2' and keeping the membrane rupture puncture needle in the extended state. When it is used up, just press the convex block 7011' to make the convex block 7011' retract from the second through hole 702' back into the inner cavity of the outer protective shell 1'. At this time, the hollow syringe 2' can be reset under the action of the compression spring, and the membrane rupture puncture needle retracts into the inner cavity of the outer protective shell 1'.
Claims
1. A disposable artificial membrane rupture sampler, characterized in that It includes an external protective shell, a hollow needle tube and a pressing head. The external protective shell is provided with an inner cavity. The front end of the external protective shell is provided with a puncture hole connected to the inner cavity. A film covering the puncture hole is provided on the puncture hole, and the rear end of the external protective shell is provided with a through hole connected to the inner cavity. The front end of the hollow needle tube is provided with a membrane-breaking puncture needle. The hollow needle tube can be movably arranged in the inner cavity of the external protective shell, and the membrane-breaking puncture needle is located behind the film, and the rear end of the hollow needle tube extends out of the through hole. The pressing head is detachably connected to the rear end of the hollow needle tube and covers the rear end opening of the hollow needle tube. A rebound structure is provided at the front of the hollow needle tube, and a locking structure is provided between the rear end of the hollow needle tube and the external protective shell.
2. The disposable artificial membrane rupture sampler according to claim 1, characterized in that: The rebound structure includes a pressure ring and a compression spring. The pressure ring is arranged at the front end of the hollow needle tube. The front end of the inner cavity of the external protective shell is provided with a limiting step. The compression spring is sleeved on the hollow needle tube, and the front end of the compression spring is connected to the limiting step, and the rear end of the compression spring is connected to the pressure ring.
3. The disposable artificial membrane rupture sampler according to claim 2, characterized in that: The locking structure includes a locking ring and at least one locking strip. The locking ring is arranged on the external protective shell. A first through hole for the hollow needle tube to pass through is opened in the middle of the locking ring. The first through hole is provided with at least one groove. The number of the grooves is the same as that of the locking strips and they correspond one to one. The locking strip is arranged on the hollow needle tube along the length direction of the hollow needle tube.
4. The disposable artificial membrane rupture sampler according to claim 2, characterized in that: The locking structure includes a spring sheet and a second through hole opened on the rear end of the side wall of the outer protective shell. One end of the spring sheet is connected to the rear end of the hollow needle tube, and the other end of the spring sheet is provided with a protrusion matching the second through hole.
5. The disposable artificial membrane rupture sampler according to claim 1, characterized in that: The rear end of the hollow needle tube is provided with an annular step, and the pressing head is detachably arranged on the annular step.
6. The disposable artificial membrane rupture sampler according to claim 5, characterized in that: The pressing head is made of silicone.
7. The disposable artificial membrane rupture sampler according to claim 1, characterized in that: The outer protective shell is tubular; a channel extending from front to back of the outer protective shell constitutes the inner cavity, the front end opening of the channel constitutes the puncture hole, and the rear end opening of the channel constitutes the through hole.
8. The disposable artificial membrane rupture sampler according to claim 7, characterized in that: The front end of the outer protective shell gradually inclines from the back to the front toward the middle.
9. The disposable artificial membrane rupture sampler according to claim 1, characterized in that: The outer protective shell and the hollow needle tube are both made of colorless and transparent plastic, and the pressing head is made of silicone.
10. The disposable artificial membrane rupture sampler according to claim 1, characterized in that: The disposable artificial membrane rupture sampler has a length of 8-12 cm and a diameter of 4-8 mm.