CN215129805U - Membrane rupturing needle for obstetrics and gynecology department - Google Patents

Abstract

The utility model discloses a membrane rupturing needle for obstetrics and gynecology department, which comprises a needle head, an operating rod, an installation part, a protective cover and an opening ring. The needle head is fixed at one end of the operating rod and is vertical to the axis of the operating rod; the operating rod is matched in a through hole formed in the mounting part, a bulge extends on the circumference of the operating rod, and the bulge is matched in a track groove formed in the inner wall of the through hole and slides in the track groove; the protecting cover is connected to the mounting part, the protecting cover and the mounting part form a needle cavity, the needle cavity is used for accommodating a needle, a needle outlet communicated with the needle cavity is formed in the outer wall of the lower side of the protecting cover, and the needle is exposed from the needle outlet when the bulge slides to one end, close to the needle, of the rail groove; the opening ring is connected to the upper side of the mounting part. When the disposable amniotic membrane is used, a doctor wears the open ring on a finger, extends the finger into the birth canal of a lying-in woman, and adjusts the position of the finger when touching the amniotic membrane. Then the doctor uses the other hand to operate the operating rod, so that the operating rod slides to the working point along the path of the track groove, and then the needle head is pressed down to puncture the amnion.

Description

Membrane rupturing needle for obstetrics and gynecology department

Technical Field

The utility model relates to a medical utensil of gynaecology and obstetrics, concretely relates to membrane rupture needle of gynaecology and obstetrics.

Background

Artificial rupture of the membrane is a common induced labor delivery-assisting mode in the natural delivery process, and the amnion at the uterine opening is ruptured through manual operation so as to observe amniotic fluid, strengthen uterine contraction and accelerate the progress of the labor process. When the artificial membrane rupture operation is clinically carried out, part of fingers of one hand of a doctor extend into the birth canal for guiding, and the other hand of the doctor sends a needle point (or medical forceps) into the birth canal to puncture (or tear) the amnion. This method has certain disadvantages: doctors need high cooperative operation of two hands, operation is inconvenient and difficult, the success rate is low due to the large operation difficulty, and multiple operations may be needed. On one hand, the delivery time is prolonged, and the pain of the lying-in woman is increased; on the other hand, the possibility of accidental injury to the lying-in woman and premature ejaculation is increased, and the safety factor of the delivery is reduced.

Some inventors have proposed some solutions to above-mentioned problem, for example the utility model patent of the name "tie up formula obstetrical department rupture of membranes drainage ware" that publication number is CN205514825U discloses, it includes rechargeable drainage box and tie up formula puncture ware, tie up formula puncture ware both sides are equipped with both legs and tie up the area, be used for fixed with tie up formula puncture ware, be equipped with the birth canal expansion pipe in the tie up formula puncture ware, be equipped with rupture of membranes needle sliding tray in the birth canal expansion pipe, it is equipped with rupture of membranes needle fixing base to slide on the rupture of membranes needle sliding tray, rupture of membranes needle fixing base upside is equipped with disposable rupture of membranes needle, rupture of membranes needle fixing base downside is equipped with well hollow propelling movement post. When the utility model is used, the delivery duct dilating tube is firstly sent into the delivery duct of the lying-in woman, then the body-binding type puncture outfit is fixed by the binding belt of the two legs, and then the pushing column is pushed to expose the disposable membrane-breaking needle outside the delivery duct dilating tube, so that the disposable membrane-breaking needle punctures the amnion. The utility model discloses a reduced doctor's the operation degree of difficulty, shortened the childbirth time, nevertheless there is certain not enough: the whole membrane rupture process completely enters the birth canal of the lying-in woman through a mechanical structure, and compared with the situation that the membrane rupture process is performed by a doctor by hand, the membrane rupture process lacks operation elasticity and is easy to cause accidental injury to the lying-in woman; compared with the manual guidance of doctors, the push column is lack of operation basis (namely, whether the disposable membrane breaking needle contacts the amnion is difficult to judge) when being pushed, and the fetus is easy to be accidentally injured.

The utility model discloses a name that publication number is CN201282993 is "a utility model patent of obstetrical department's fetal membrane needle", and it includes fixing base, blade or needle point, adjusts pole and ring, and the end and the regulation pole of blade and needle point are connected, adjust pole threaded connection to the fixing base, and the ring setting is in fixing base one side. When the utility model is used, the finger ring is sleeved on the forefinger or the middle finger of a doctor, the doctor stretches the fingers sleeved with the finger ring into the birth canal of a lying-in woman, when the fingers touch the amnion, the adjusting rod is rotated by the other hand, and the blade or the needle point is stretched out to puncture the amnion. The utility model discloses a doctor only one hand stretches into in the lying-in woman's birth canal during the use, and has roughly confirmed the position of blade or needle point with the fixing base that the ring is connected, and the amnion can be punctured to the regulation pole of another hand only need rotate, has reduced doctor's the operation degree of difficulty, and stretches into the structure in the lying-in woman's birth canal and is guided by doctor's finger, and the possibility that causes the accidental injury to lying-in woman and foetus is low. However, the utility model has the disadvantages that the adjusting rod is connected with the fixed seat by screw thread, the screw pitch of the screw thread is very small in consideration of the structural size, a certain stroke is needed for the blade or the needle point to enter the working area, the time for rotating the adjusting rod by a doctor is longer, and the pain of the lying-in woman is increased.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a provide a gynaecology and obstetrics's rupture of membranes needle, it leads to get into the birth canal through doctor's finger, and the possibility that causes the accidental injury to lying-in woman and foetus is low, and it is short to the required operating time of amnion of puncturing from confirming the amnion position, has shortened the childbirth time, has reduced lying-in woman's misery.

The technical scheme of the utility model is that: a membrane rupturing needle for obstetrics and gynecology department, comprising:

a needle head;

the needle head is fixed at one end of the operating rod and is vertical to the axis of the operating rod;

the mounting part is provided with a through hole, the operating rod is matched in the through hole, and two ends of the operating rod exceed the through hole; the inner wall of the through hole is provided with a track groove, the circumference of the operating rod extends to form a bulge, and the bulge is matched in the track groove and can slide along the track groove;

the protecting cover is connected to the mounting part, a needle head cavity is formed by the protecting cover and the mounting part, and the needle head cavity is used for accommodating a needle head; the outer wall of the lower side of the protecting cover is provided with a needle outlet communicated with the needle cavity, and when the bulge slides to one end of the track groove close to the needle head, the needle head is exposed from the needle outlet;

the opening ring is connected to the upper side of the installation part.

According to the gynecological and obstetric membrane rupturing needle, when the needle is used, a doctor wears the open ring on a finger (usually an index finger or a middle finger of a hand used for the doctor), the doctor stretches the finger with the open ring into a delivery passage of a puerpera, and when the doctor touches the amnion with the finger, the doctor appropriately moves the finger upwards. Then, the doctor operates one end of the operating rod without the needle head, which is exposed outside the birth canal, with the other hand to control the operating rod to slide, and as the bulge extending out of the circumference of the operating rod is matched in the track groove on the inner wall of the through hole, the operating rod slides to a working point along the path of the track groove (at the moment, the bulge slides to one end, which is close to the needle head, of the track groove), the needle head exceeds the needle head cavity and is exposed from the needle outlet. Then, according to the specific position of the touch amnion, a doctor presses down the needle (bends the finger or presses down the whole hand part), punctures the amnion, and after the success of the membrane rupture is determined, the operating rod is operated to return the needle to the needle cavity, and the extending finger is retracted.

The gynaecology and obstetrics rupture of membranes needle of this scheme uses doctor's hand as the guide during the use, advances and touches in lying-in woman birth canal and confirms the amnion position, later by the finger that stretches into pushing down the syringe needle that stretches out and puncture the amnion, compares in the rupture of membranes operation of pure mechanical type, factor of safety is higher, and it is lower to cause the possibility of accidental injury to lying-in woman and foetus. The operating rod slides along the path of the track groove, so that the whole movement path of the needle is completely limited, the protection of the needle cavity and the limitation of the needle outlet are added, and the needle can be controlled within a safety range in the whole movement process, so that a doctor does not need to worry when operating the operating rod, the needle can quickly enter a working point, and compared with a mode of screwing in the needle through threads, the delivery time is shortened, and the pain of a lying-in woman is reduced.

The gynaecology and obstetrics's rupture of membranes needle of this scheme, the doctor need stretch into the lying-in woman birth canal with the finger earlier when considering the use, and doctor's finger position suitably shifts up after confirming the amnion position, just later operates the action bars, makes the syringe needle expose for avoiding the mistake to touch the action bars before this, and then leads to accidental injury lying-in woman and foetus, should have certain protectiveness when the track groove is designed, makes the action bars have stronger anti mistake and touches the ability, ensures safe in utilization.

Preferably, the track groove comprises a linear groove distributed along the axial direction of the operating rod and a spiral groove taking the axis of the operating rod as a generatrix, and one end of the spiral groove far away from the needle head is connected with one end of the linear groove close to the needle head. When the operating rod is operated to enable the bulge to slide to one end, close to the needle head, of the spiral groove, the needle head enters a working point, the operating rod can enter the spiral groove only through the linear groove, the linear groove can serve as a mistaken-touch resisting part of the track groove, and the operating rod cannot rotate before the bulge slides into the spiral groove. Under the condition that the lead angle of the spiral groove is proper, when the operating rod is operated to enable the bulge to slide along the spiral groove, both torque and certain thrust are needed, and at the moment, the spiral groove also has certain anti-false-touch capacity.

Preferably, the rotation angle of the spiral groove is 90-110 degrees. The rotation angle of the spiral groove directly affects the time required by a doctor to operate the operating rod, and if the rotation angle of the spiral groove is too large, the time for rotating the operating rod is long, and even the operating rod may need to be rotated step by step. On the other hand, the rotation angle of the spiral groove also affects the axial displacement of the needle head along the operating rod, if the rotation angle of the spiral groove is too small, the structure size is increased or the helix angle of the spiral groove is increased, the normal use is affected or the safety coefficient is reduced, so the value of the rotation angle of the spiral groove needs to be comprehensively considered.

Preferably, the lead angle of the spiral groove is 30-40 °. The lead angle of the spiral groove influences the anti-false-touch capacity of the spiral groove, the lead angle is too large, the operating rod can be pushed to slide along the spiral groove only by thrust, the lead angle is too small, the operating rod can be rotated to slide along the spiral groove only by torque, and in order to ensure that the spiral groove has certain anti-false-touch capacity, the lead angle of the spiral groove needs to be properly taken.

Preferably, one side of the spiral groove is provided with an arc-shaped elastic sheet, and the arc-shaped elastic sheet is used for clamping the bulge at one end of the spiral groove close to the needle head. The arc-shaped elastic piece can clamp the protrusion at one end of the spiral groove close to the needle head, so that the operating rod is clamped when the needle head reaches a working point, the operating rod cannot fall back and fluctuate to cause the posture deviation of the needle head due to external force interference during subsequent use, and the judgment of a doctor is influenced to cause accidental injury to a lying-in woman and a fetus.

Preferably, the distance between the spiral grooves along the axial direction of the operating rod is 0.3-0.6 of the length of the linear groove. The linear groove is long, so that on one hand, the linear groove can provide strong anti-false touch capability, namely, the difficulty of passing the protrusion through the whole linear groove is increased due to false touch; on the other hand, the position distribution of the needle outlets on the protective cover is facilitated.

Preferably, the other end of the operating rod is provided with a rotating handle, and the rotating handle is arranged perpendicular to the axis of the operating rod. Considering the structural size restriction (the restriction of the birth canal space of the puerpera in the use occasion), the diameter of the operating rod is relatively small, the doctor is inconvenient to operate the rotating rod to rotate, and the rotating handle is arranged at the other end of the operating rod, so that the doctor can conveniently rotate to operate.

Preferably, the open finger ring is made of plastic. Considering that the fingers of different doctors are different in thickness, in order to ensure that the doctors can wear the open finger ring on the fingers, the open finger ring is made of plastic, so that the open finger ring has certain elasticity and a large application diameter range, and the condition that a plurality of open finger rings with different sizes and models need to be produced so as to be suitable for a wide doctor group is avoided.

The utility model has the advantages that: when the device is used, the device is guided by the hands of a doctor, moves in the birth canal of a lying-in woman and touches to determine the position of the amnion, and then the stretched needle head is pressed down by the stretched fingers to puncture the amnion, so that the safety coefficient is high, and the possibility of accidental injury to the lying-in woman and a fetus is low; the path of the needle to the working point is completely limited, the protection of the needle cavity and the limitation of the needle outlet are added, so that a doctor is helped to avoid the potential safety hazard that the needle reaches the working point by operating the operating rod, the operating efficiency of the doctor is improved, the delivery time is shortened, and the pain of a lying-in woman is reduced; through the protective design to the track groove, the anti mistake that has improved the action bars ability of touching has ensured the security when using.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention, the scale is different from that of fig. 1.

Fig. 3 is a bottom view of the present invention, in a different scale from fig. 1.

Fig. 4 is a front view of the needle 1 of the present invention when it reaches the working position.

Fig. 5 is a left side view of the needle 1 of the present invention in the working position, which is different from fig. 4 in scale.

Fig. 6 is a bottom view of the needle 1 of the present invention reaching the working position, in a different scale from fig. 4.

Fig. 7 is a schematic view of the track groove 5 of the present invention, and the spiral groove 5.2 is developed along the circumference of the slot.

In the figure:

a needle head 1;

an operating lever 2;

a mounting portion 3;

a through hole 4;

a track groove 5, a linear groove 5.1 and a spiral groove 5.2;

a protrusion 6;

a protective cover 7;

a needle lumen 8;

a needle outlet 9;

an open finger ring 10;

an arc-shaped elastic piece 11;

a stem 12.

Detailed Description

To make the objects, technical solutions and advantages of embodiments of the present invention clearer, the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present solution, and are not construed as limiting the present solution.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "a plurality" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as fixed or removable connections or integral parts, either mechanically or electrically, or in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The first embodiment is as follows: as shown in fig. 1 to 7, a membrane rupturing needle for obstetrics and gynecology department includes:

a needle head 1;

the needle head 1 is fixed at one end of the operating rod 2, and the needle head 1 is vertical to the axis of the operating rod 2;

the mounting part 3 is provided with a through hole 4, the operating rod 2 is matched in the through hole 4, and two ends of the operating rod 2 exceed the through hole 4; a track groove 5 is formed in the inner wall of the through hole 4, a protrusion 6 extends on the circumference of the operating rod 2, and the protrusion 6 is matched in the track groove 5 and can slide along the track groove 5;

the protective cover 7 is connected to the mounting part 3, the protective cover 7 and the mounting part 3 form a needle head cavity 8, and the needle head cavity 8 is used for accommodating the needle head 1; a needle outlet 9 communicated with the needle head cavity 8 is formed in the outer wall of the lower side of the protecting cover 7, and when the bulge 6 slides to one end, close to the needle head 1, of the rail groove 5, the needle head 1 is exposed from the needle outlet 9;

an opening finger ring 10, the opening finger ring 10 is connected to the upper side of the mounting part 3.

In the gynecological and obstetric membrane rupturing needle of the embodiment, when in use, a doctor wears the open finger ring 10 on a finger (usually an index finger or a middle finger of a hand for use), the doctor stretches the finger with the open finger ring 10 into the birth canal of a parturient, and when the doctor touches the amnion, the doctor moves the finger up appropriately. Then, the doctor operates one end of the operating rod 2 without the needle 1, which is exposed outside the birth canal, with the other hand to control the operating rod 2 to slide, because the protrusion 6 extending from the circumference of the operating rod 2 is matched in the track groove 5 on the inner wall of the through hole 4, the operating rod 2 slides to the working point along the path of the track groove 5 (at this time, the protrusion 6 slides to one end of the track groove 5, which is close to the needle 1), and the needle 1 exceeds the needle cavity 8 and is exposed from the needle outlet 9. Then, according to the specific position of the touch amnion, the doctor presses down the needle 1 (bends the finger or presses down the whole hand part), punctures the amnion, and after the success of the membrane rupture is determined, the operating rod 2 is operated to withdraw the needle 1 into the needle cavity 8, and the inserted finger is withdrawn.

The gynaecology and obstetrics rupture of membranes needle of this embodiment uses doctor's hand as the guide during the use, advances and touches in lying-in woman birth canal and confirms the amnion position, and later by the syringe needle 1 that stretches out of the finger push down that stretches into puncture the amnion, compare in the rupture of membranes operation of pure mechanical type, factor of safety is higher, and the possibility that causes the accidental injury to lying-in woman and foetus is lower. As the operating rod 2 slides along the path of the track groove 5, the whole moving path of the needle 1 is completely limited, the protection of the needle cavity 8 and the limitation of the needle outlet 9 are added, and the needle 1 can be controlled within a safe range in the whole moving process, so that a doctor does not need to worry when operating the operating rod 2, the needle 1 can enter a working point quickly, and compared with a mode of screwing the needle 1 into a thread, the labor time is shortened, and the pain of a parturient is reduced.

The gynaecology and obstetrics's rupture of membranes needle of this embodiment, the doctor need stretch into the lying-in woman birth canal with the finger earlier when considering the use, and doctor's finger position suitably shifts up after confirming the amnion position, just later operates operating lever 2, makes syringe needle 1 expose for avoiding the mistake to touch operating lever 2 before this, and then leads to accidental injury lying-in woman and foetus, and track groove 5 should have certain protectiveness when designing, makes operating lever 2 have stronger anti mistake and touches the ability, ensures safe in utilization.

Further, the track groove 5 comprises a linear groove 5.1 distributed along the axial direction of the operating rod 2 and a spiral groove 5.2 taking the axis of the operating rod 2 as a generatrix, and one end of the spiral groove 5.2 far away from the needle head 1 is connected with one end of the linear groove 5.1 close to the needle head 1. The track groove 5 comprises a linear groove 5.1 distributed along the axial direction of the operating rod 2 and a spiral groove 5.2 taking the axial line of the operating rod 2 as a generatrix, and one end of the spiral groove 5.2 far away from the needle head 1 is connected with one end of the linear groove 5.1 close to the needle head 1. When the operating rod 2 is operated to enable the bulge 6 to slide to one end, close to the needle 1, of the spiral groove 5.2, the needle 1 enters a working point, the operating rod 2 can enter the spiral groove 5.2 only through the linear groove 5.1, the linear groove 5.1 can serve as an anti-error contact part of the track groove 5, and the operating rod 2 cannot rotate before the bulge 6 slides into the spiral groove 5.2. When the lead angle of the spiral groove 5.2 is proper, the operation rod 2 needs both torque and certain thrust when the bulge 6 slides along the spiral groove 5.2, and the spiral groove 5.2 also has certain anti-false touch capability.

Furthermore, the rotation angle of the spiral groove 5.2 is 90-110 degrees. The angle of rotation of the helical groove 5.2 directly affects the time required by the surgeon to operate the operating rod 2, and if the angle of rotation of the helical groove 5.2 is too large, the time required to rotate the operating rod 2 is relatively long, and even the operating rod 2 may need to be rotated step by step. On the other hand, the rotation angle of the spiral groove 5.2 also affects the axial displacement of the needle 1 along the operating rod 2, and if the rotation angle of the spiral groove 5.2 is too small, the structure size is increased or the helix angle of the spiral groove 5.2 is increased, so that the normal use is affected or the safety factor is reduced, and therefore the rotation angle of the spiral groove 5.2 needs to be comprehensively considered.

Furthermore, the lead angle of the spiral groove 5.2 is 30-40 degrees. The lead angle of the spiral groove 5.2 influences the anti-false-touch capability of the spiral groove 5.2, if the lead angle is too large, the operating rod 2 can be pushed to slide along the spiral groove 5.2 only by thrust, if the lead angle is too small, the operating rod 2 can be rotated to slide along the spiral groove 5.2 only by torque, and in order to ensure that the spiral groove 5.2 has certain anti-false-touch capability, the lead angle of the spiral groove 5.2 needs to be properly taken.

Furthermore, an arc-shaped elastic piece 11 is arranged on one side of the spiral groove 5.2, and the arc-shaped elastic piece 11 is used for clamping the bulge 6 at one end of the spiral groove 5.2 close to the needle head 1. The arc-shaped elastic piece 11 can clamp the bulge 6 at one end of the spiral groove 5.2 close to the needle head 1, namely, the operating rod 2 is clamped when the needle head 1 reaches a working point, the operating rod 2 cannot move back and fluctuate to enable the posture of the needle head 1 to deviate due to external force interference during subsequent use, and judgment of a doctor is influenced to cause accidental injury to a lying-in woman and a fetus.

Furthermore, the distance between the spiral grooves 5.2 along the axial direction of the operating rod 2 is 0.3-0.6 of the length of the linear groove 5.1. The linear groove 5.1 is long, so that on one hand, the linear groove 5.1 can provide strong anti-false touch capability, namely, the difficulty of passing the protrusion 6 through the whole linear groove 5.1 is increased due to false touch; on the other hand, the distribution of the positions of the needle outlets 9 on the protective cover 7 is facilitated.

Further, the other end of the operating rod 2 is provided with a rotating handle 12, and the rotating handle 12 is arranged perpendicular to the axis of the operating rod 2. Considering the structural size limitation (the restriction of the space of the birth canal of the puerpera in the use occasion), the diameter of the operating rod 2 is relatively small, the doctor is inconvenient to operate the rotating rod 2 to rotate, and the rotating handle 12 is arranged at the other end of the operating rod 2, so that the doctor can conveniently rotate the operating rod.

Further, the open finger ring 10 is made of plastic. Considering that the fingers of different doctors are different in thickness, in order to ensure that the doctors can wear the open finger ring 10 on the fingers, the open finger ring 10 is made of plastic, so that the open finger ring 10 has certain elasticity and a large range of applicable diameters, and the need of producing a plurality of open finger rings 10 with different sizes and models to be suitable for a wide range of doctor groups is avoided.

The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.

Claims (8)

1. The utility model provides a gynaecology and obstetrics's rupture of membranes needle, characterized by includes:

a needle (1);

the needle head (1) is fixed at one end of the operating rod (2), and the needle head (1) is vertical to the axis of the operating rod (2);

the installation part (3) is provided with a through hole (4), the operating rod (2) is matched in the through hole (4), and two ends of the operating rod (2) exceed the through hole (4); a track groove (5) is formed in the inner wall of the through hole (4), a protrusion (6) extends on the circumference of the operating rod (2), and the protrusion (6) is matched in the track groove (5) and can slide along the track groove (5);

the protective cover (7), the protective cover (7) is connected on the mounting part (3), the protective cover (7) and the mounting part (3) form a needle cavity (8), and the needle cavity (8) is used for accommodating the needle (1); a needle outlet (9) communicated with the needle head cavity (8) is formed in the outer wall of the lower side of the protecting cover (7), and when the bulge (6) slides to one end, close to the needle head (1), of the rail groove (5), the needle head (1) is exposed from the needle outlet (9);

an opening finger ring (10), the opening finger ring (10) is connected on the upper side of the mounting part (3).

2. The membrane rupturing needle for obstetrics and gynecology department according to claim 1, wherein the track groove (5) comprises a linear groove (5.1) distributed along the axial direction of the operating rod (2) and a spiral groove (5.2) taking the axis of the operating rod (2) as a generatrix, and one end of the spiral groove (5.2) far away from the needle head (1) is connected with one end of the linear groove (5.1) close to the needle head (1).

3. The membrane rupturing needle for obstetrics and gynecology department as claimed in claim 2, wherein the rotation angle of the spiral groove (5.2) is 90-110 °.

4. The membrane rupturing needle for obstetrics and gynecology department according to claim 2, wherein the helix angle of the spiral groove (5.2) is 30-40 °.

5. A membrane rupturing needle for obstetrics and gynecology department according to any one of claims 2 to 4, characterized in that one side of the spiral groove (5.2) is provided with an arc-shaped elastic sheet (11), and the arc-shaped elastic sheet (11) is used for clamping the protrusion (6) at one end of the spiral groove (5.2) close to the needle head (1).

6. The gynecological membrane rupturing needle according to any one of claims 2 to 4, wherein the spiral grooves (5.2) have a pitch in the axial direction of the operating rod (2) of 0.3 to 0.6 of the length of the linear groove (5.1).

7. The membrane rupturing needle for obstetrics and gynecology department according to claim 1, wherein the other end of the operating rod (2) is provided with a rotating handle (12), and the rotating handle (12) is arranged perpendicular to the axis of the operating rod (2).

8. A membrane rupturing needle for obstetrics and gynecology department according to claim 1, wherein the open finger ring (10) is made of plastic.

Images