Amniotic fluid puncture drainage device

Abstract

The invention relates to the technical field of medical instruments, in particular to an amniotic fluid puncture drainage device. The amniotic fluid puncture drainage device comprises a mounting base, an injector, a needle tube, a connector, a needle head, a mounting ring, a conical head and the like. A fixing mechanism is arranged in the mounting seat, an injector is connected to the fixing mechanism, a driving mechanism is arranged at the bottom of the mounting seat, a connector is in threaded connection with the left end of the injector, a needle tube is arranged at the left end of the connector, a plurality of connecting strips are fixedly connected into the end, away from the connector, of the needle tube, a sliding groove is formed in the left side of each connecting strip, and a conical head is slidably connected into each sliding groove. And a sliding block is arranged on the conical head. The needle head for puncture and the blunt conical head for extraction are integrated in the same needle tube, no instrument needs to be replaced, the needle head is controlled to retract and give way only by pushing the push block, the blunt conical head can be directly switched to perform amniotic fluid extraction, the operation steps are simplified, and the manpower cooperation requirement is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a device for puncturing and extracting amniotic fluid. BACKGROUND

[0002] The fluid filled in the amniotic cavity is called amniotic fluid, which is the core protection and buffer medium for the fetus during its growth and development in the mother's uterus. It not only provides a constant temperature and shockproof intrauterine environment for the fetus, but also participates in the metabolism of the fetus, playing an irreplaceable role in maintaining the physiological stability of the fetus in the uterus. The source, amount and composition of amniotic fluid are not fixed, but show dynamic changes as the gestational age advances. This change is closely related to the organ development stage of the fetus and the physiological state of the mother, and is one of the important dynamic indicators for clinical evaluation of maternal and infant health. In the early stages of pregnancy, amniotic fluid is mainly dialysis fluid from maternal serum entering the amniotic cavity through the placenta, with a small amount of exudation from the surface of the placenta and the umbilical cord. When the fetal blood circulation is formed, water and small molecules in the fetus can exude through the unkeratinized fetal skin, forming part of the amniotic fluid. In the field of obstetrics, regular sampling and testing of amniotic fluid in pregnant women can effectively determine the health status of the fetus and the mother, timely detect hidden diseases that are difficult to detect during routine prenatal examination, and provide reliable laboratory basis for clinicians to develop targeted treatment plans (such as intrauterine intervention, early termination of pregnancy or postpartum treatment preparation), thereby reducing the health risks of mother and infant, and ensuring the safety of pregnancy and normal development of the fetus.

[0003] The existing liquid extraction device needs to use a special needle tube to puncture the fetal membrane first, and then use another blunt tube to insert into the puncture hole to extract amniotic fluid. During the process, not only the medical staff need to frequently alternate holding and replace the two types of instruments, but also often need the assistance of an assistant to pass the instruments, which is easy to cause the exposure time of the puncture hole to be too long, increase the risk of amniotic fluid leakage, or affect the extraction efficiency due to the positioning deviation when replacing the instruments. SUMMARY

[0004] In order to overcome the shortcomings of the existing amniotic fluid extraction device, which needs to use a special needle tube to puncture the fetal membrane first, and then use another blunt tube to insert into the puncture hole to extract amniotic fluid, which is easy to cause the exposure time of the puncture hole to be too long and increase the risk of amniotic fluid leakage, the present application can provide an amniotic fluid puncture and extraction device.

[0005] The technical scheme is as follows: an amniotic fluid puncture and liquid extraction device, comprising a mounting seat, a syringe, a needle tube, a connector, a needle, a mounting ring, a conical head, a sliding block, a sleeve ring, a connecting strip, a limiting ring, an elastic member, a clamping block and a control panel, the mounting seat is internally provided with a fixing mechanism, the fixing mechanism is connected with the syringe, the bottom of the mounting seat is provided with a driving mechanism, the left end of the syringe is threadedly connected with the connector, the left end of the connector is provided with the needle tube, the inside of the end of the needle tube away from the connector is fixedly connected with a plurality of connecting strips, each connecting strip is provided with a sliding groove on the left side, the conical head is slidably connected in the sliding groove, the conical head is provided with the sliding block, the conical head is slidably connected with the connecting strip through the sliding block, the conical head is fixedly connected with the sleeve ring, the sleeve ring is slidably connected with the needle, the needle tip of the needle faces left, the right end of the needle is provided with the mounting ring, the mounting ring is connected with the elastic member between the left side and the right side of the sleeve ring, each connecting strip is fixedly connected with the clamping block, the clamping block is elastic, the circle formed by the plurality of clamping blocks is smaller than the mounting ring, the front end of the mounting seat is provided with the control panel, and the right end of the connecting strip is provided with the limiting ring.

[0006] As a preferred technical scheme of the present application, the fixing mechanism comprises a guide rail, a gear, a rack, a semicircular fixed block and a servo motor, the top inner side of the mounting seat is provided with the guide rail, the guide rail is slidably connected with two racks, the top of each of the two racks is provided with a semicircular fixed block, the two semicircular fixed blocks form a ring, the bottom of the guide rail is provided with the servo motor, the output shaft of the servo motor is connected with the gear, and the gear is located between the two racks and is engaged with the two racks.

[0007] As a preferred technical scheme of the present application, the driving mechanism comprises a gas cylinder and a connecting piece, the bottom of the mounting seat is provided with the gas cylinder, the right top of the telescopic rod of the gas cylinder is provided with the connecting piece, the top of the connecting piece is provided with a clamping groove, and the clamping groove is matched with the wing plate of the piston rod of the syringe.

[0008] As a preferred technical scheme of the present application, the size of the through hole of the limiting ring is consistent with the size of the needle tube hole.

[0009] As a preferred technical scheme of the present application, the conical head is provided with a push block.

[0010] As a preferred technical scheme of the present application, the device further comprises a cover, after the amniotic fluid is extracted, the connector is unscrewed and replaced with the cover, and the cover is threadedly connected to the left end of the syringe.

[0011] As a preferred technical scheme of the present application, the device further comprises a scale line, and the scale line is arranged on the outer side of the syringe.

[0012] As a preferred technical scheme of the present application, the device further comprises a rubber pad, and the rubber pad is arranged on the inner wall of the semicircular fixed block.

[0013] The present application has the following advantages: 1, the present application integrates the needle for puncture and the blunt conical head for extraction in the same needle tube, without changing any instrument, only by pushing the push block to control the needle to retract, the blunt conical head for amniotic fluid extraction can be directly switched, the operation steps are simplified, the labor cooperation demand is reduced, and the positioning error and safety hidden danger caused by multiple instrument switching are avoided.

[0014] 2, the design of the cover of the present application can realize reliable sealing of the amniotic fluid sample, which can isolate external microorganisms and air, protect the sterile environment of the syringe as a culture dish and the stability of the sample composition, prevent sample pollution or leakage leading to invalid detection, and conveniently operate through threaded connection, adapt to the needs of clinical rapid sampling and safe inspection, and protect the integrity of the culture dish structure.

[0015] 3, the design of the air cylinder and the connecting piece, the air cylinder extension stroke is set through the control panel, and then the amniotic fluid extraction amount is accurately controlled, the deviation of manual extraction force and the quantity control error are avoided, and the precise needs of different detection items for amniotic fluid quantity are met. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application.

[0017] Figure 2 It is a schematic diagram of the structure of the needle tube, needle and conical head of the present application.

[0018] Figure 3 It is a schematic diagram of the structure of the conical head and the connecting strip of the present application.

[0019] Figure 4 It is an explosion diagram of the connecting strip, needle and conical head of the present application.

[0020] Figure 5 It is a schematic diagram of the structure of the present application after the needle is retracted into the needle tube.

[0021] Figure 6 It is a schematic diagram of the structure of the joint and the cover of the present application.

[0022] Figure 7 It is a schematic diagram of the structure of the air cylinder and the connecting piece of the present application.

[0023] Figure 8 It is a schematic diagram of the structure of the gear and the rack of the present application.

[0024] Figure 9 It is an explosion diagram of the connecting piece and the piston rod of the present application.

[0025] Label name in the figure: 1- mount, 2- syringe, 21- scale line, 22- piston rod, 3- needle tube, 31- joint, 32- cover, 4- needle, 41- mounting ring, 5- conical head, 51- push block, 52- sliding block, 53- collar, 6- connecting strip, 61- sliding groove, 7- limiting ring, 8- elastic piece, 9- clamping block, 10- control panel, 11- air cylinder, 12- connecting piece, 13- clamping groove, 14- guide rail, 15- gear, 16- rack, 17- semicircular fixed block, 171- rubber pad, 18- servo motor. DETAILED DESCRIPTION

[0026] The technical solutions will be further described below in combination with specific embodiments. It should be noted that the words such as up, down, left, right, etc. indicating the directions in the text are only for the positions of the shown structures in the corresponding drawings. The serial numbers of the components in the text, such as first, second, etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. The connection and coupling mentioned in the present application include direct and indirect connection (coupling) unless otherwise specified.

[0027] An amniotic fluid puncture and liquid extraction device, such as Figures 1-9As shown, including the mounting seat 1, syringe 2, needle tube 3, joint 31, needle 4, mounting ring 41, tapered head 5, slider 52, collar 53, connecting strip 6, limiting ring 7, elastic element 8, clamping block 9 and control panel 10, the mounting seat 1 is provided with a fixing mechanism, the fixing mechanism is connected with the syringe 2, the bottom of the mounting seat 1 is provided with a driving mechanism, the left end of the syringe 2 is threadedly connected with the joint 31, the left end of the joint 31 is provided with the needle tube 3, the inside of the end away from the joint 31 of the needle tube 3 is fixedly connected with a plurality of connecting strips 6, each connecting strip 6 is provided with a sliding groove 61 on the left side, the tapered head 5 is slidably connected in the sliding groove 61, the tapered head 5 is provided with the slider 52, the tapered head 5 is slidably connected with the connecting strip 6 through the slider 52, the tapered head 5 is fixedly connected with the collar 53, the needle 4 is slidably connected in the collar 53, the needle tip of the needle 4 faces left, the right end of the needle 4 is provided with the mounting ring 41, the elastic element 8 is connected between the left side of the mounting ring 41 and the right side of the collar 53, each connecting strip 6 is fixedly connected with the clamping block 9, the clamping block 9 is elastic, the circle formed by the plurality of clamping blocks 9 is smaller than the mounting ring 41, when the slider 52 is located at the leftmost end of the sliding groove 61, the needle 4 is located at the left side of the clamping block 9, the elastic element 8 is in a compressed state, in the process of moving the tapered head 5 to the right, the elastic element 8 is further compressed, the elastic potential energy gradually increases, when the tapered head 5 moves to the right of the sliding groove 61, the elastic potential energy released by the elastic element 8 drives the mounting ring 41 to press the clamping block 9, and is sufficient to cause the clamping block 9 to deform, thereby allowing the mounting ring 41 to pass through the clamping block 9, the mounting seat 1 is provided with the control panel 10 at the front end, the right end of the connecting strip 6 is provided with the limiting ring 7, a through hole is formed in the middle of the limiting ring 7, a plurality of round holes are formed on the outside of the limiting ring 7, amniotic fluid enters the inside of the needle tube 3 through the round holes, and then flows to the syringe 2 to complete extraction, the size of the through hole in the limiting ring 7 is consistent with the size of the tube hole of the needle tube 3, can form physical obstruction to the mounting ring 41, play a limiting role, part of the amniotic fluid flows along the inner wall of the needle 4 to the syringe 2, the through hole with the same size can avoid the flow resistance caused by the sudden change of the hole diameter.

[0028] As shown in the figure, Figure 8 The fixing mechanism includes guide rails 14, gears 15, racks 16, semicircular fixed blocks 17 and servo motors 18, the top inside of the mounting seat 1 is provided with guide rails 14 on the left and right sides, two racks 16 are slidably connected in each guide rail 14, the top of each rack 16 is provided with a semicircular fixed block 17, the two semicircular fixed blocks 17 form a ring, the bottom of the guide rail 14 is provided with a servo motor 18, the output shaft of the servo motor 18 is connected with a gear 15, the gear 15 is located between the two racks 16 and the gear 15 and the two racks 16 are engaged, the servo motor 18 drives the gear 15 to rotate, so that the two racks 16 slide along the guide rails 14, the two semicircular fixed blocks 17 form a ring, the syringe 2 is clamped on the mounting seat 1, the mounting seat 1 can be installed on the operating table, freeing the medical staff from the burden of manual operation, providing reliable instrument fixing support for subsequent precise puncture of fetal membranes and stable extraction of amniotic fluid.

[0029] As Figure 9 shown, the driving mechanism includes a cylinder 11 and a connecting piece 12, the cylinder 11 is arranged at the bottom of the mounting seat 1, the connecting piece 12 is arranged at the top right side of the telescopic rod of the cylinder 11, the connecting piece 12 is provided with a clamping groove 13 at the top, the clamping groove 13 is matched with the wing plate of the piston rod 22 of the syringe 2, medical staff can adjust the extension distance of the telescopic rod of the cylinder 11 according to the clinical needs, such as gestational age, detection items and the requirements of amniotic fluid volume, and control the extension distance of the telescopic rod of the cylinder 11 through the control panel 10, so as to accurately control the amniotic fluid volume sucked by the syringe 2, and avoid the problems that the amniotic fluid leakage risk is increased due to excessive extraction amount or the detection demand cannot be met due to uneven force and hand feeling deviation when the amniotic fluid is manually extracted.

[0030] As Figure 4 shown, the pushing block 51 is further arranged outside the conical head 5, which provides a convenient operation carrier for the movement of the conical head 5, and the pushing block 51 provides an easy-to-grip force point for medical staff by increasing the hand contact area.

[0031] As Figure 6 shown, the cover 32 is further arranged, after the amniotic fluid is extracted, the connector 31 is unscrewed and replaced with the cover 32, the cover 32 is screw-connected to the left end of the syringe 2, after the amniotic fluid is extracted, the medical staff unscrews the connector 31 and connects the cover 32 to the syringe 2, which seals the opening of the syringe 2, prevents external air, dust, microorganisms and other pollutants from entering the syringe 2, and prevents the sample from being contaminated.

[0032] As Figure 7 shown, the scale line 21 is further arranged, the scale line 21 is arranged outside the syringe 2, which can intuitively mark the amniotic fluid volume, facilitate to control the extraction amount during liquid extraction to adapt to the detection demand, and is also beneficial to standardize sample division during cultivation, trace sample integrity during sample delivery, simplify operation process and reduce human error.

[0033] As Figure 8 shown, the rubber pad 171 is further arranged, the rubber pad 171 is arranged on the inner wall of the semicircular fixing block 17, which increases the friction force with the syringe 2 to prevent sliding, buffers the clamping force to avoid damaging the syringe 2, and improves the fixing stability.

[0034] In use, the medical staff starts the servo motor 18 through the control panel 10, the servo motor 18 drives the gear 15 to rotate, because the gear 15 is engaged with the two racks 16, the rotation of the gear 15 is converted into the smooth sliding of the two racks 16 along the inner wall of the guide rail 14, the two semicircular fixed blocks 17 are close to each other, and finally form a complete ring to tightly fit the outer wall of the syringe 2, so that the syringe 2 is clamped on the upper part of the mounting seat 1, and the syringe 2 is prevented from deviating in subsequent operations; the medical staff holds the end of the needle tube 3, and pierces the amniotic membrane by aiming the needle head 4 at the puncture position of the amniotic membrane of the patient, then pushes the push block 51, and drives the conical head 5 to move smoothly to the right along the sliding groove 61 on the connecting strip 6; in the initial state, the elastic member 8 is in a pre-compressed state, at this time, the elastic member 8 continuously applies a rightward pushing force to the mounting ring 41, but the pushing force is smaller than the clamping constraint force of the elastic clamping block 9 on the mounting ring 41, and the mounting ring 41 is always limited to the left side of the clamping block 9; when the conical head 5 moves to the right, the sleeve ring 53 further extrudes the elastic member 8, so that the compression amount of the elastic member 8 gradually increases, and the elastic potential energy stored by the elastic member 8 continuously accumulates; when the sliding block 52 moves to the right of the sliding groove 61, the elastic potential energy of the elastic member 8 will increase to a degree sufficient to overcome the constraint force of the elastic clamping block 9, at this time, the elastic member 8 releases the potential energy, generates a pushing force, and pushes the mounting ring 41 to extrude the elastic clamping block 9 to the right, so that the clamping block 9 is forced to be elastically deformed radially outward, and an annular channel sufficient for the mounting ring 41 to smoothly pass through is formed, the needle head 4 is then quickly retracted into the needle tube 3 under the driving of the mounting ring 41, so that the needle head 4 is prevented from being exposed to damage the surrounding tissues; then the medical staff sets the extension and retraction parameters of the air cylinder 11 through the control panel 10 again, and starts the air cylinder 11, the extension rod of the air cylinder 11 extends according to the pre-set stroke, drives the connecting member 12 to move to the right, drives the piston rod 22 to move to the right, so that a stable negative pressure is formed in the syringe 2, and the amniotic fluid flows into the syringe 2 under the action of the negative pressure to complete the extraction; after the sampling is completed, the medical staff controls the servo motor 18 to drive the gear 15 to reverse through the control panel 10, drives the two racks 16 to slide reversely along the guide rail 14, so that the two semicircular fixed blocks 17 are separated to release the clamping of the syringe 2, then the syringe 2 is manually taken out, the connector 31 is unscrewed, and then the cover 32 is screwed to the left end of the syringe 2, so that the amniotic fluid sample is stored in a sealed manner, external microorganisms and air are isolated, the sterile environment of the syringe 2 as a culture dish and the stability of the sample composition are ensured, the sample is prevented from being contaminated or leaked to cause invalid detection, and preparation is made for subsequent submission.

[0035] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An amniocentesis device, characterized in that, The utility model relates to a kind of injection devices, including mounting seat (1) and syringe (2), needle tube (3), joint (31), needle (4), mounting ring (41), conical head (5), slider (52), collar (53), connecting strip (6), limiting ring (7), elastic member (8), clamping block (9) and control panel (10), mounting seat (1) is equipped with fixed mechanism inside, fixed mechanism is connected with syringe (2) on it, the bottom of mounting seat (1) is equipped with driving mechanism, the left end of syringe (2) is threadedly connected with joint (31), the left end of joint (31) is equipped with needle tube (3), the inside of needle tube (3) far from the one end of joint (31) is fixedly connected with several connecting strips (6), every connecting strip (6) left side is opened with sliding slot (61), conical head (5) is slidably connected in sliding slot (61), conical head (5) is equipped with slider (52), conical head (5) is slidably connected with connecting strip (6) by slider (52), conical head (5) is fixedly connected with collar (53) inside, needle (4) is slidably connected in collar (53), the needle tip of needle (4) is left, needle (4) right end is equipped with mounting ring (41), elastic member (8) is connected between mounting ring (41) left side and collar (53) right side, every connecting strip (6) is fixedly connected with clamping block (9) inside, clamping block (9) has elasticity, the circle formed by several clamping blocks (9) is less than mounting ring (41), the front end of mounting seat (1) is equipped with control panel (10), the right end of connecting strip (6) is equipped with limiting ring (7).

2. The device of claim 1, wherein the needle is a 22 gauge needle. The fixed mechanism includes guide rail (14), gear (15), rack (16), semicircular fixed block (17) and servo motor (18), the top inner side of mounting seat (1) is equipped with guide rail (14), two rack (16) are slidably connected in guide rail (14), the top of two rack (16) is equipped with semicircular fixed block (17), two semicircular fixed blocks (17) are combined to form a ring, the bottom of guide rail (14) is equipped with servo motor (18), the output shaft of servo motor (18) is connected with gear (15), gear (15) is located between two rack (16) and gear (15) and two rack (16) are engaged.

3. The device of claim 2, wherein the needle is a 23 gauge needle. The driving mechanism includes air cylinder (11) and connecting piece (12), the bottom of mounting seat (1) is equipped with air cylinder (11), the right top of the telescopic rod of air cylinder (11) is equipped with connecting piece (12), the top of connecting piece (12) is opened with clamping groove (13), clamping groove (13) and the wing plate of piston rod (22) on syringe (2) are engaged.

4. The device of claim 3, wherein the needle is a 23 gauge needle. The size of the through hole on the limiting ring (7) is consistent with the size of the tube hole of needle tube (3).

5. The device of claim 4, wherein the needle is a 22 gauge needle. Still including push block (51), the outside of conical head (5) is equipped with push block (51).

6. The device of claim 5, wherein the needle is a 22 gauge needle. Still including lid (32), after extracting amniotic fluid, unscrew joint (31) and replace lid (32), lid (32) is threadedly connected on the left end of syringe (2).

7. The device of claim 6, wherein the needle is a 23 gauge needle. Still including scale line (21), the outside of syringe (2) is equipped with scale line (21).

8. The device of claim 7, wherein the needle is a 22 gauge needle. Still including rubber pad (171), the inner wall of semicircular fixed block (17) is equipped with rubber pad (171).

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