CN217593441U

CN217593441U - Obstetrical department is with gathering blood ware

Info

Publication number: CN217593441U
Application number: CN202220140263.2U
Authority: CN
Inventors: 伍蕾; 张利; 刘桃
Original assignee: Fourth Hospital Of Changsha
Current assignee: Fourth Hospital Of Changsha
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-10-18
Anticipated expiration: 2032-01-19

Abstract

The utility model provides a blood collecting device for obstetrical department, which comprises a blood collecting pot body, a hip pad, a diversion sticking layer and a liquid collecting device connected on the blood collecting pot body; the blood collector is provided with the hip pads at the top and the edge of the hip supporting seat, so that the hip skin at the contact part of the hip supporting seat and the edge of the hip supporting seat is prevented from being pressed and sore is prevented, and the comfort of a puerpera is improved; meanwhile, the blood collected in the blood collecting cavity can be completely drained into the liquid collecting bottle, the bleeding amount of the pregnant and lying-in women can be accurately measured through the scale lines on the liquid collecting bottle, the bleeding condition of the pregnant and lying-in women can be judged, and the drainage of the blood can be quickly realized through the negative pressure generating device; meanwhile, the pasting layer on the upper part of the diversion pasting layer is pasted on the area between the vaginal orifice and the anus of the lying-in woman, the pasting layer on the lower part is pasted on the front end face of the hip supporting seat, and the blood flowing out of the vaginal orifice is guided into the blood collecting cavity through the diversion pasting layer, so that the blood can be prevented from flowing downwards along the skin and flowing to the hip or even to the back of the lying-in woman.

Description

Obstetrical department is with gathering blood ware

The technical field is as follows:

the utility model relates to an obstetrical department appurtenance technical field, concretely relates to obstetrical department is with gathering blood ware.

The background art comprises the following steps:

the vaginal bleeding amount exceeding 500mL within 24 hours after delivery of the fetus is called postpartum hemorrhage, 80% of the postpartum hemorrhage occurs within 2 hours, the most common and dangerous symptoms of the obstetrics are, and the vaginal bleeding amount is still one of the main causes of death of most pregnant and lying-in women at present; accurate aassessment of amount of bleeding plays key effect in the diagnosis treatment of postpartum hemorrhage, direct influence treatment decision on next step, in order to measure the postpartum amount of bleeding of pregnant and lying-in women in time, so that in time judge pregnant and lying-in women's postpartum state, and can in time accurately use medicine according to the condition of bleeding, it measures to adopt blood collector to postpartum amount of bleeding to gather blood ware mostly clinically, gather blood ware also known to gather the blood basin, be a basin body form container, the internal scale mark that has attached, will gather blood ware pad in patient's buttock postpartum, blood gathers in, can make clear up patient's amount of bleeding through the scale.

The existing blood collector is inconvenient to use, the blood collector is padded below the hip in the clinical use process, the blood collector is difficult to be completely in a horizontal state, the measured bleeding amount is not accurate enough, the blood collector can only measure 500ml of blood, and only estimation can be carried out when the blood collector exceeds 500ml, so that the blood collector is more inaccurate; as the blood collected in the blood collector is increased gradually, the blood is easy to topple over to pollute the obstetric table and increase the infection probability of the puerpera; meanwhile, the blood collector is arranged below the hip and is made of a plastic material, so that the comfort level of the blood collector is poor, and if a puerpera spends a long time, pressure sores are easily caused on the skin of the hip at the contact part of the blood collector, especially the part contacted with the edge of the blood collector; meanwhile, the blood collector is arranged below the buttocks, so that the buttocks are in a high-padded state, part of blood flowing out of the vagina flows downwards along the skin and flows to the buttocks or even the back of a puerpera, on one hand, the blood does not completely enter the blood collector, so that the measured bleeding amount is not accurate enough, and on the other hand, clothes and a obstetric table can be polluted.

The invention content is as follows:

the utility model aims at solving the problem that the prior blood collector mentioned in the above background art is not accurate enough to the bleeding volume measurement, the comfort level is relatively poor and the whole blood that can not make the vagina flow out gets into the blood collector, and providing a blood collector for obstetrical department.

The utility model adopts the following technical scheme to realize the purpose of the invention: a blood collecting device for obstetrical department comprises a blood collecting pot body and a diversion adhesive layer; the blood collecting basin is characterized in that the whole blood collecting basin body is in a basin body shape and comprises a hip supporting seat and a blood collecting cavity, the hip supporting seat is arranged at the rear part of the inner side of the blood collecting basin body, the blood collecting cavity is a cavity which is formed by the front end face of the hip supporting seat at the front side of the hip supporting seat and the blood collecting basin body and is used for containing blood, and scale lines for measuring the blood volume in the blood collecting cavity are arranged at the edge of the blood collecting cavity; the upper part and the lower part of the back of the diversion sticking layer are respectively provided with a sticking layer, and the outer side of the sticking layer is stuck with a tearing film which can completely cover the sticking layer.

Specifically, the diversion adhesive layer is sterile waterproof adhesive paper, sterile waterproof adhesive cloth or a sterile adhesive film.

Preferably, a layer of hydrophobic material is coated on the front surface of the diversion sticking layer and the inner wall of the blood collection cavity.

Further, obstetrical department still includes the buttockss pad with gathering blood ware, buttockss pad 2 includes buttock support cushion layer and buttock supporting seat edge parcel layer, and buttock support cushion layer is unanimous with buttock supporting seat specification size, buttock supporting seat edge parcel layer perpendicular to buttock supporting seat cushion layer just sets up in buttock supporting seat cushion layer rear end edge.

Preferably, the edge wrapping layer of the hip support cushion layer and/or the hip support seat is a silicone rubber pad or a cotton pad or an air bag pad.

The obstetrical department blood collector further comprises a liquid collecting device, wherein the liquid collecting device comprises a drainage connector, a drainage pipeline and a liquid collecting bottle, two ends of the drainage pipeline are respectively connected with the drainage connector and the liquid collecting bottle, the liquid collecting bottle is supported by a transparent material, and scale marks for measuring blood in the liquid collecting bottle are arranged on the outer side of the liquid collecting bottle; the lower part of the blood collecting pot body is provided with a joint pipe communicated with the blood collecting cavity, and the drainage joint is detachably, hermetically and sleeved with the joint pipe.

Preferably, the bottom surface of the blood collection cavity is an inclined surface, and the connector pipe is connected to the lowest position of the bottom surface of the blood collection cavity.

Furthermore, the liquid collecting device further comprises a negative pressure connecting pipe and a negative pressure generating device, and the negative pressure generating device is communicated with the liquid collecting bottle through the negative pressure connecting pipe.

Furthermore, the joint pipe comprises a hollow pipe body and a control valve which is arranged in the pipe body and can close and open the pipe body; the drainage joint is detachably, hermetically and sleeved with the pipe body.

Furthermore, the control valve comprises a valve seat, a valve rod positioning plate, a spring and an elastic sealing plug; the valve seat is fixedly arranged at the upper part of the inner side of the pipe body, a through hole through which the valve rod passes and a through hole through which blood passes are arranged on the valve seat, the valve rod is hollow, the lower end of the valve rod is opened, and a plurality of liquid passing through holes communicated with the inner side and the outer side of the valve rod are arranged on the valve rod; the outer side of the lower part of the valve rod is fixedly connected with a valve rod positioning plate; the spring is sleeved outside the valve rod, the top of the spring is connected with the lower end face of the valve seat, and the bottom of the spring is connected with the top face of the valve rod positioning plate; the elastic sealing plug is fixedly installed at the top of the valve rod, and the top pipe orifice of the pipe body can be sealed by the specification of the elastic sealing plug.

Preferably, an internal thread is arranged on the inner wall surface of the tube body, an external thread is arranged on the outer wall surface of the drainage joint, and the drainage joint is screwed in the tube body through thread sealing.

Further, the disk seat includes the valve rod lantern ring, connecting rod, and the valve rod lantern ring is equipped with the valve rod trepanning that supplies the valve rod to pass through the connecting rod fixed connection that two at least symmetries set up on the body in valve rod lantern ring middle part, is equipped with the blood through-hole that supplies blood to pass through between adjacent connecting rod.

By adopting the technical scheme, the utility model better realizes the purpose of the invention, and the obstetrical blood collector can prevent the buttock skin of the part contacting with the buttock supporting seat from being pressed sore, especially the part contacting with the buttock supporting seat edge, and increase the comfort of the lying-in woman by laying the buttock pads on the top and the edge of the buttock supporting seat; meanwhile, the blood collected in the blood collecting cavity can be drained into the liquid collecting bottle, the bleeding amount of the pregnant and lying-in women can be accurately measured through the scale lines on the liquid collecting bottle, the bleeding condition of the pregnant and lying-in women can be judged, and the drainage of the blood can be rapidly realized through the negative pressure generating device; meanwhile, the pasting layer on the upper part of the diversion pasting layer is pasted on the area between the vaginal orifice and the anus of the lying-in woman, the pasting layer on the lower part is pasted on the front end face of the hip supporting seat, and the blood flowing out of the vaginal orifice is guided into the blood collecting cavity through the diversion pasting layer, so that the blood can be prevented from flowing downwards along the skin and flowing to the hip or even to the back of the lying-in woman.

Description of the drawings:

fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic structural view of the blood collecting pot body 1 of the present invention.

Fig. 3 is a schematic structural view of the hip pad 2 of the present invention.

Fig. 4 is a schematic structural view of the middle diversion pasting layer 3 of the present invention.

Fig. 5 is a schematic plane structure diagram of the liquid collecting device 4 of the present invention.

Fig. 6 is a schematic plane structure diagram of the middle joint pipe 13 and a schematic connection diagram of the joint pipe 13 and the drainage joint 41 of the present invention.

Fig. 7 is a schematic plan view of the valve seat 132 and a schematic connecting and mounting diagram with the tube 131 according to the present invention.

The reference numerals are illustrated in the following table.

Number of mark	Name of label	Number of mark	Name of label
				1	Blood collecting pot 1	135	Spring 135
11	Buttocks support seat 11	136	Elastic sealing plug 136
				111	Front end surface 111 of hip support seat	2	Hip pad 2
12	Blood collecting cavity 12	21	Buttocks support cushion layer 21
				121	Graduation mark 121	22	Buttock support seat edge coating 22
13	Joint pipe 13	3	Flow guiding adhesive layer 3
				131	Tube 131	31	Adhesive layer 31
132	Valve seat 132	4	Liquid collecting device 4
				1321	Valve stem collar 1321	41	Drainage connector 41
1322	Connecting rod 1322	42	Drainage tube 42
				1323	Valve stem socket 1323	43	Liquid collecting bottle 43
1324	Blood through-hole 1324	44	Negative pressure connecting pipe 44
				133	Valve stem 133	45	Negative pressure generating device 45
134	Valve stem positioning plate 134

The specific implementation mode is as follows:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive labor, and the contents of the invention will be further described with reference to the drawings:

example 1:

referring to the attached figures 1, 2 and 4 of the specification, the obstetrical department blood collecting device comprises a blood collecting pot body 1 and a diversion adhesive layer 3; the blood collection basin body 1 is integrally in a basin body shape and comprises a hip support seat 11 and a blood collection cavity 12, the hip support seat 11 is arranged at the rear part of the inner side of the blood collection basin body 1, the blood collection cavity 12 is a cavity which is formed by a front end surface 111 of the hip support seat at the front side of the hip support seat 11 and the blood collection basin body 1 and is used for containing blood, scale lines 121 for measuring the blood volume in the blood collection cavity 12 are arranged at the edge of the blood collection cavity 12, and the bleeding volume of a lying-in woman can be estimated roughly through the scale lines 121; the upper part and the lower part of the back of the diversion sticking layer 3 are respectively provided with a sticking layer 31, and the outer side of the sticking layer 31 is stuck with a tearing film which can completely cover the sticking layer 31; after the tear film is torn off, the pasting layer 31 on the upper portion is pasted on the area between the vaginal orifice and the anus of the lying-in woman, the pasting layer 31 on the lower portion is pasted on the front end surface 111 of the hip support seat, and the blood flowing out of the vaginal orifice is guided into the blood collecting cavity 12 through the flow guiding pasting layer 3, so that the blood can be prevented from flowing downwards along the skin, flowing to the hip and even flowing to the back of the lying-in woman.

In a specific embodiment, the diversion adhesive layer 3 is a sterile waterproof adhesive paper, a sterile waterproof adhesive cloth or a sterile adhesive film, which can prevent blood from wetting the diversion adhesive layer 3 and can play a good diversion role.

In a preferred embodiment, a layer of hydrophobic material is coated on the front surface of the diversion adhesion layer 3 and the inner wall of the blood collection cavity 12, and the hydrophobic material can prevent blood from being adhered on the inner walls of the diversion adhesion layer 3 and the blood collection cavity 12, so that the blood collection cavity 12 can be conveniently cleaned and sterilized for reuse in the later period; in particular, the hydrophobic material is PTFE, fluorinated polyethylene, fluorocarbon wax or other synthetic fluoropolymer.

In one embodiment, referring to fig. 1 and 3, the obstetrical blood collecting device further comprises a hip pad 2, wherein the hip pad 2 comprises a hip support pad layer 21 and a hip support seat edge wrapping layer 22, the hip support pad layer 21 is in the same size as the hip support seat 11, and the hip support seat edge wrapping layer 22 is perpendicular to the hip support pad layer 21 and is arranged at the rear end edge of the hip support pad layer 21; buttock support cushion layer 21 covers at buttock supporting seat 11 top, and buttock supporting seat edge parcel layer 22 lives buttock supporting seat 11 rear end edge parcel, prevents that buttock skin from receiving the oppression and appearing pressing the sore, especially with the position of gathering blood ware edge contact, improves the lying-in woman travelling comfort.

In a preferred embodiment, the buttocks support cushion layer 21 and/or the buttocks support seat edge wrapping layer 22 are silicone rubber pads or cotton pads or air bag pads, which make the buttocks of the lying-in woman soft contact with the blood collector; when the air bag cushion is used, the air bag cushion is also provided with a connecting pipe which is convenient for inflating and deflating the air bag cushion, the connecting pipe is arranged on the wrapping layer 22 at the edge of the hip supporting seat, and the connecting pipe is used for connecting an inflation and deflation device to inflate and deflate the air bag.

Meanwhile, the hip pad 2 can be positioned between the parts of the hip support cushion layer 21 and/or the hip support seat edge wrapping layer 22 which are directly contacted with the blood collecting pot body 1 through double faced adhesive tapes or magic tapes; for example, when the buttock support seat is a magic tape, the adhesive layer on the back of the child magic tape is adhered to the top surface of the buttock support seat 11, the adhesive layer on the back of the female magic tape is adhered to the bottom of the buttock support seat cushion layer 21, the buttock support seat cushion layer 21 and the buttock support seat 11 are fixed through mutual adhesion of the child magic tape and the female magic tape, and meanwhile, the child magic tape and the female magic tape are conveniently torn to replace the buttock cushion 2; when being the double faced adhesive tape, paste the double faced adhesive tape and realize the rigidity to buttock supporting seat bed course 21 and buttock supporting seat 11 between buttock supporting seat course 21 and buttock supporting seat 11, also be convenient for simultaneously tear the double faced adhesive tape and change buttock pad 2.

In an embodiment, referring to fig. 1 and 5, the obstetrical blood collecting device further includes a liquid collecting device 4, the liquid collecting device 4 includes a drainage connector 41, a drainage pipeline 42 and a liquid collecting bottle 43, two ends of the drainage pipeline 42 are respectively connected to the drainage connector 41 and the liquid collecting bottle 43, the liquid collecting bottle 43 is supported by a transparent material, and scale marks for measuring blood in the liquid collecting bottle 43 are arranged outside the liquid collecting bottle 43; the lower part of the blood collecting pot body 1 is provided with a connector pipe 13 communicated with the blood collecting cavity 12, and the drainage connector 41 is detachably and hermetically sleeved with the connector pipe 13; the bottom surface of the blood collecting cavity 12 is an inclined surface, and the connector tube 13 is connected to the lowest position of the bottom surface of the blood collecting cavity 12; after the blood enters the blood collecting cavity 12, the blood can sequentially pass through the connector pipe 13, the drainage connector 41 and the drainage pipeline 42 under the action of gravity and enter the liquid collecting bottle 43, and the accurate measurement of the bleeding amount of the puerpera is realized through the scale marks on the liquid collecting bottle 43.

It should be noted that: the liquid collecting device 4 is not used, the connector pipe 13 is sealed, the scale mark 121 arranged on the edge of the blood collecting cavity 12 can roughly estimate the bleeding amount of the puerpera, and the liquid collecting device 4 can be connected to accurately measure the bleeding amount if the estimation is inaccurate or the estimated bleeding amount is more than 500 ml; the liquid collecting device 4 can be connected from the beginning, and the blood entering the blood collecting cavity 12 can be continuously introduced into the liquid collecting bottle 43 for accurate metering.

In one embodiment, referring to fig. 1 and 5, the liquid collecting device 4 further comprises a negative pressure connecting pipe 44 and a negative pressure generating device 45, wherein the negative pressure generating device 45 is communicated with the liquid collecting bottle 43 through the negative pressure connecting pipe 44; by applying negative pressure to the liquid collecting bottle 43, all blood is conveniently and quickly sucked into the liquid collecting bottle 43, and meanwhile, the blood can be prevented from remaining in the blood collecting cavity 12, the connector pipe 13, the drainage connector 41 and the drainage pipeline 42, so that the bleeding amount is inaccurately measured; the negative pressure generating device 45 is a negative pressure bottle or a negative pressure machine.

In one embodiment, referring to fig. 6, the joint pipe 13 includes a hollow pipe body 131 and a control valve disposed inside the pipe body 131 for closing and opening the pipe body 131; the drainage joint 41 is detachably sleeved with the tube body 131 in a sealing manner; the control valve comprises a valve seat 132, a valve rod 133, a valve rod positioning plate 134, a spring 135 and an elastic sealing plug 136; the valve seat 132 is fixedly arranged at the upper part of the inner side of the tube body 131, a through hole through which the valve rod 133 passes and a through hole through which blood passes are arranged on the valve seat 132, the valve rod 133 is hollow and has an opening at the lower end, and a plurality of liquid passing through holes 1331 which are communicated with the inner side and the outer side of the valve rod 133 are arranged on the valve rod 133; a valve rod positioning plate 134 is fixedly connected to the outer side of the lower part of the valve rod 133; the spring 135 is sleeved outside the valve rod 133, the top of the spring 135 is connected with the lower end face of the valve seat 132, and the bottom of the spring 135 is connected with the top face of the valve rod positioning plate 134; the elastic sealing plug 136 is fixedly mounted at the top of the valve rod 133, the specification of the elastic sealing plug 136 can seal the pipe orifice at the top of the pipe body 131, and the elastic sealing plug 136 is made of one of silica gel, nitrile rubber and fluororubber; the elastic sealing plug 136 can be ensured to have flexibility and elasticity, and the tube 131 can be closed and opened.

In a preferred embodiment, an internal thread is provided on the inner wall surface of the tube 131, and an external thread is provided on the outer wall surface of the drainage connector 41, and the drainage connector 41 is screwed into the tube 131 by a thread seal.

In one embodiment, referring to fig. 7, the valve seat 132 includes a stem collar 1321 and a connecting rod 1322, the stem collar 1321 is fixedly connected to the tube 131 through four symmetrically arranged connecting rods 1322, a stem collar hole 1323 for the stem 133 to pass through is formed in the middle of the stem collar 1321, and a blood through hole 1324 for blood to pass through is formed between adjacent connecting rods 222.

The spring 135 is in an initial state, the elastic sealing plug 136 is located inside the tube body 131 to seal the tube body 131, when the drainage connector 41 is rotatably connected with the tube body 131, the end head of the drainage connector 41 props against the valve rod 133 and slowly pushes the valve rod 133, the valve rod positioning plate 134 and the elastic sealing plug 136 move up integrally until the elastic sealing plug 136 is separated from the tube body 131, at the moment, the spring 135 becomes a compression state, blood in the blood collection cavity 12 enters the tube body 131, enters the valve rod 133 from the liquid passing through hole 1331 and finally enters the liquid collection bottle 43 through the drainage connector 41 and the drainage pipeline 42 to achieve drainage of the blood; after the blood drainage is finished, the drainage connector 41, the valve rod 133, the valve rod positioning plate 134 and the elastic sealing plug 136 can be rotated reversely, so that the whole body moves downwards under the action of the spring 135 until the elastic sealing plug 136 enters the tube body 131 again and seals the tube body 131, and at the moment, the spring 135 is restored to the stretching state.

The application method of the obstetrical blood collector disclosed by the patent comprises the following steps: after the delivery woman is born, the blood collector is arranged at the hip position of a patient, the hip is contacted with the hip pad 2, after a tear film on the diversion pasting layer 3 is torn off, the pasting layer 31 on the upper portion is pasted on the area between the vaginal opening and the anus of the delivery woman, the pasting layer 31 on the lower portion is pasted on the front end face 111 of the hip support seat, the drainage connector 41 is rotatably connected onto the tube body 131, the negative pressure generating device 45 is started, the blood flowing out of the vagina of the delivery woman is pasted through diversion and completely enters the blood collecting cavity 12 through the diversion, the blood sequentially passes through the connector pipe 13, the drainage connector 41 is connected with the drainage pipeline 42 and enters the liquid collecting bottle 43, medical workers can accurately measure the blood volume through the scale lines on the liquid collecting bottle 43, and the bleeding condition of the delivery woman is judged.

It is clear that modifications and/or additions of parts may be made to the obstetric hemoconcentrator as described heretofore, and to the corresponding method, without departing from the field and scope of the present invention.

It is also clear that, although the present invention has been described in detail, a person of skill in the art shall certainly be able to achieve many other equivalent forms of obstetric hemostill and corresponding method, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

Claims

1. The utility model provides an obstetrical department is with gathering blood ware which characterized in that: comprises a blood collecting pot body (1), a hip pad (2) and a diversion adhesive layer (3); the blood collecting pot body (1) is integrally in a pot body shape and comprises a hip supporting seat (11) and a blood collecting cavity (12), the hip supporting seat (11) is arranged at the rear part of the inner side of the blood collecting pot body (1), the blood collecting cavity (12) is a cavity formed by a hip supporting seat front end surface (111) at the front side of the hip supporting seat (11) and the blood collecting pot body (1) and used for containing blood, and scale lines (121) for measuring the blood volume in the blood collecting cavity (12) are arranged at the edge of the blood collecting cavity (12); the upper part and the lower part of the back of the diversion pasting layer (3) are respectively provided with a pasting layer (31), and the outer side of the pasting layer (31) is pasted with a tearing film which can completely cover the pasting layer (31); the hip pad (2) comprises a hip supporting cushion layer (21) and a hip supporting seat edge wrapping layer (22), the hip supporting cushion layer (21) is consistent with the hip supporting seat (11) in specification and size, and the hip supporting seat edge wrapping layer (22) is perpendicular to the hip supporting cushion layer (21) and is arranged at the edge of the rear end of the hip supporting cushion layer (21).

2. An obstetric hemocoagulator as set forth in claim 1, wherein: the diversion sticking layer (3) is sterile waterproof sticking paper, sterile waterproof sticking cloth or a sterile sticking film.

3. An obstetric hemocoagulator as set forth in claim 1, wherein: the hip supporting seat cushion layer (21) and/or the hip supporting seat edge wrapping layer (22) are silicone rubber pads, cotton pads or air bag pads.

4. An obstetric hemocoagulator as set forth in claim 1, wherein: the obstetrical department blood collector further comprises a liquid collecting device (4), the liquid collecting device (4) comprises a drainage connector (41), a drainage pipeline (42) and a liquid collecting bottle (43), two ends of the drainage pipeline (42) are respectively connected with the drainage connector (41) and the liquid collecting bottle (43), the liquid collecting bottle (43) is supported by a transparent material, and scale marks for measuring blood in the liquid collecting bottle (43) are arranged on the outer side of the liquid collecting bottle (43); the lower part of the blood collecting pot body (1) is provided with a joint pipe (13) communicated with the blood collecting cavity (12), and the drainage joint (41) is detachably, hermetically and sleeved with the joint pipe (13).

5. An obstetric hemocoagulator as set forth in claim 4, wherein: the bottom surface of the blood collecting cavity (12) is an inclined surface, and the connector pipe (13) is connected to the lowest position of the bottom surface of the blood collecting cavity (12).

6. An obstetric hemocoagulator as set forth in claim 4, wherein: the liquid collecting device (4) further comprises a negative pressure connecting pipe (44) and a negative pressure generating device (45), and the negative pressure generating device (45) is communicated with the liquid collecting bottle (43) through the negative pressure connecting pipe (44).

7. An obstetric hemocoagulator as set forth in claim 4, wherein: the joint pipe (13) comprises a hollow pipe body (131) and a control valve which is arranged in the pipe body (131) and can close and open the pipe body (131); the drainage joint is characterized in that internal threads are arranged on the inner wall surface of the pipe body (131), external threads are arranged on the outer wall surface of the drainage joint (41), and the drainage joint (41) is screwed in the pipe body (131) through thread sealing.

8. An obstetric hemoconcentrator as claimed in claim 7, wherein: the control valve comprises a valve seat (132), a valve rod (133), a valve rod positioning plate (134), a spring (135) and an elastic sealing plug (136); the valve seat (132) is fixedly arranged at the upper part of the inner side of the pipe body (131), a through hole through which the valve rod (133) passes and a through hole through which blood passes are arranged on the valve seat (132), the valve rod (133) is hollow, the lower end of the valve rod is opened, and a plurality of liquid passing through holes (1331) which are communicated with the inner side and the outer side of the valve rod (133) are arranged on the valve rod (133); a valve rod positioning plate (134) is fixedly connected to the outer side of the lower part of the valve rod (133); the spring (135) is sleeved outside the valve rod (133), the top of the spring (135) is connected with the lower end face of the valve seat (132), and the bottom of the spring (135) is connected with the top face of the valve rod positioning plate (134); the elastic sealing plug (136) is fixedly arranged at the top of the valve rod (133), and the specification of the elastic sealing plug (136) can seal the pipe orifice at the top of the pipe body (131).

9. An obstetric hemocoagulator as set forth in claim 8, wherein: the valve seat (132) comprises a valve rod lantern ring (1321) and a connecting rod (1322), the valve rod lantern ring (1321) is fixedly connected to the pipe body (131) through the connecting rod (1322) which is symmetrically arranged at least two, a valve rod sleeve hole (1323) for the valve rod (133) to pass through is arranged in the middle of the valve rod lantern ring (1321), and a blood through hole (1324) for blood to pass through is formed between the adjacent connecting rods (1322).