CN111407980A - Medical blood return prevention device and method - Google Patents
Medical blood return prevention device and method Download PDFInfo
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- CN111407980A CN111407980A CN202010286503.5A CN202010286503A CN111407980A CN 111407980 A CN111407980 A CN 111407980A CN 202010286503 A CN202010286503 A CN 202010286503A CN 111407980 A CN111407980 A CN 111407980A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
- A61M5/40—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body using low-level float-valve to cut off media flow from reservoir
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Abstract
The invention relates to a medical blood return prevention device and a method, wherein the top of an upper cavity tube is communicated with an upper connecting tube, the bottom of a lower cavity is communicated with a lower communicating tube, a communicating hole is formed in the center of a middle connecting seat, a longitudinal limiting rope is movably arranged in the communicating hole, a counterweight ball is arranged at the lower end of the longitudinal limiting rope below the middle connecting seat, two sides of the counterweight ball are connected with the inner wall of the lower cavity through the transverse limiting rope, an upper sealing cover is arranged at the top end of the longitudinal limiting rope above the middle connecting seat, and a floating ball is arranged above the upper sealing cover; the defect that body blood flows back to an infusion tube of an infusion apparatus after medical liquid medicine is emptied is avoided, the risk that the blood flowing back into the infusion apparatus is coagulated into blocks and enters a human body is avoided, the occurrence of the condition that blood vessels are blocked by thrombus is reduced, and serious medical accidents such as iatrogenic infection, septicemia and the like are completely avoided. The patient is protected safely.
Description
Technical Field
The invention relates to the field of medicine, in particular to a medical blood return prevention device and a medical blood return prevention method.
Background
The medical transfusion system is a common medical consumable used for clinically delivering liquid medicine to human veins, and generally comprises a bottle stopper puncture outfit, a transfusion tube, an air filter, a Murphy's tube, a filter, a flow rate regulator, a luer connector and a vein scalp needle. The existing venous transfusion device is in the process of transfusion, after the liquid medicine in the venous transfusion device flows out, if a liquid medicine bottle is not replaced or the transfusion device is detached in time, the liquid medicine can flow all the time and can not stop until the venous pressure of a human body and the gravity of the liquid medicine in the transfusion device are balanced, due to the diffusion effect of the liquid medicine, the blood of the human body flows back to a transfusion tube of the transfusion device, the blood return phenomenon can not only cause the terror of a patient, once the blood return phenomenon occurs, the blood flowing back into the transfusion device can be coagulated into blocks, if the blood blocks enter the human body, the situation that the blood vessels are blocked by thrombus can occur, even serious medical accidents such as iatrogenic infection, septicemia and the like occur, and.
Therefore, the medical blood return prevention device and the method which have the advantages of simple structure, convenient operation, high working and running efficiency, good blood return prevention effect, wide application range, simple use method and easy operation are produced, and the medical blood return prevention device and the method have wide market prospect.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the medical blood return prevention device and the method which have the advantages of simple structure, convenient operation, high working and running efficiency, good blood return prevention effect, wide application range, simple use method and easy operation, and are used for overcoming the defects in the prior art.
The technical scheme of the invention is realized as follows: the utility model provides a medical blood return prevention device, includes upper portion chamber pipe, the lower part cavity that is connected with upper portion chamber pipe through middle part connecting seat, the top intercommunication of upper portion chamber pipe have the upper portion connecting pipe, the bottom intercommunication of lower part cavity has lower part communicating pipe, the intercommunicating pore has been seted up at the central point of middle part connecting seat, movable mounting has vertical spacing rope in the intercommunicating pore, the counter weight ball is installed to vertical spacing rope low side of middle part connecting seat below, the both sides of counter weight ball all are connected with the inner wall of lower part cavity through horizontal spacing rope, the sealed lid of upper portion is installed on vertical spacing rope top above the middle part connecting seat, the floater is installed to the top.
The upper portion chamber pipe be the bottom and be provided with open-ended cylindrical cavity structure, the bottom inner wall of upper portion chamber pipe is through the outer wall upper portion fixed connection of mode and middle part connecting seat of pasting, the middle part connecting seat is cylindrical sheet structure, the external diameter of middle part connecting seat and the internal diameter of upper portion chamber pipe are mutually supported, the lower part cavity is that the top is provided with open-ended cylindrical cavity structure, the top inner wall of lower part cavity is through the outer wall lower part fixed connection of mode and middle part connecting seat of pasting, the internal diameter of lower part cavity equals with the internal diameter of upper portion chamber pipe, the external diameter of lower part cavity equals with the external diameter of upper portion chamber pipe, the length of upper.
The upper portion connecting pipe be cylindrical hollow tubular structure, the bottom of upper portion connecting pipe is linked together with the top of upper portion chamber pipe, the top intercommunication of upper portion connecting pipe has first connecting pipe, first external screw thread connection layer has been seted up to the upper portion outer end of first connecting pipe, lower part communicating pipe be cylindrical hollow tubular structure, the top of lower part communicating pipe is linked together with the bottom of lower part cavity, bottom intercommunication of lower part communicating pipe has the second connecting pipe, the second external screw thread connection layer has been seted up to the lower part outer end of second connecting pipe, the pipe diameter of upper portion connecting pipe equals with the pipe diameter of lower part communicating pipe, the pipe diameter of first connecting pipe equals with the pipe diameter of second connecting pipe.
The intercommunicating pore be circular through-hole structure, vertical spacing rope movable mounting is in the intercommunicating pore, the counter weight ball is circular spheroid structure, the outside parcel at the counter weight ball installs the counter weight ball protective layer, there are two first lantern rings at the bilateral symmetry position fixed mounting of counter weight ball protective layer, symmetrical position fixed mounting has two second lantern rings that combine together with two first lantern rings on lower cavity inner wall, the one end of horizontal spacing rope is connected with first lantern ring, the other end of horizontal spacing rope is connected with the second lantern ring, fixed mounting has the third lantern ring on the counter weight ball protective layer outer wall of two first lantern ring top intermediate positions, vertical spacing rope low side is connected with the third lantern ring, the diameter of counter weight ball is not less than the internal diameter of intercommunicating pore.
The sealed lid of upper portion for the bottom notched lid structure of taking, the bottom central point of the sealed lid of upper portion puts fixed mounting with the fourth lantern ring, vertical spacing rope top is connected with the fourth lantern ring, top central point of the sealed lid of upper portion puts fixed mounting with the fifth lantern ring, puts fixed mounting with the sixth lantern ring at the bottom central point of floater, fixed mounting has floater pulling force rope between the fifth lantern ring and the sixth lantern ring, the diameter of the sealed lid of upper portion is not less than the internal diameter of intercommunicating pore.
The swing contained angle of horizontal spacing rope be 60 degrees, the length of horizontal spacing rope is not more than the radius of lower part cavity, the length of top position to the low end position of intercommunicating pore of counterweight ball under the free gravity action is not more than the length of lower part cavity, the extension line of vertical spacing rope of counterweight ball under the free gravity action and the contained angle of horizontal spacing rope extension line are 60 degrees, the second cover ring is located the inside intermediate position of lower part cavity, first cover ring is located counterweight ball protective layer outside intermediate position, counterweight ball protective layer is the hollow spheroid structure of plastics, the inner wall of counterweight ball protective layer cooperatees with the outer wall of counterweight ball, counterweight ball protective layer adopts the mode suit of integrative pouring at the outer wall of counterweight ball, distance between the vertical central line of counterweight ball and the lower part cavity inner wall equals with the radius of lower part cavity.
The upper sealing cover is made of medical silica gel, the lifting length of the upper sealing cover is equal to that of the counterweight ball, the lifting length of the upper sealing cover is equal to the length between the ferrying ranges of the transverse limiting ropes, the floating ball is of a spherical hollow structure, the diameter of the floating ball is not smaller than that of the counterweight ball, and the top end of the initial position of the floating ball is parallel and level to the lower end of the transverse center line of the upper cavity tube.
A method for preventing blood return by using the medical blood return prevention device comprises the following steps: when in use, the upper connecting pipe is communicated with the medical liquid input pipeline, the lower communicating pipe is communicated with the medical liquid output pipeline, the upper cavity pipe and the lower cavity body are horizontally arranged, the counterweight ball naturally droops under the action of gravity, the longitudinal limiting rope is in a relaxed state, the upper sealing cover is staggered with the communicating hole, the liquid input pipeline and the medical liquid output pipeline are ensured to be vertically arranged at the moment, then the medical liquid input pipeline is opened, the medical liquid flows into the upper connecting pipe from the medical liquid input pipeline under the action of gravity and then flows into the upper cavity pipe from the upper connecting pipe, the medical liquid smoothly enters the lower cavity body from the communicating hole due to the open state of the communicating hole, when the medical liquid flow is normal and a small amount of medical liquid is remained in the upper cavity pipe and the lower cavity body, the upper cavity pipe and the lower cavity body are returned to, at the moment, due to the buoyancy effect of the medical liquid, the floating ball floats in the upper cavity, after the floating ball floats, the floating ball drives the upper sealing cover to ascend along with the continuous injection of the medical liquid, the upper sealing cover drives the counterweight ball to ascend through the longitudinal limiting rope, meanwhile, the counterweight ball is limited by the transverse limiting rope and is kept below the communicating hole, the medical liquid is ensured to descend into the lower cavity through the communicating hole and further descend into the liquid output pipeline, when the liquid in the medical liquid input pipeline is vacant, the liquid level of the medical liquid in the upper cavity descends along with the counterweight ball, the floating ball descends, the upper sealing cover descends along with the counterweight ball, when the upper sealing cover descends to the middle connecting seat to be contacted, the bottom of the upper sealing cover seals the communicating hole, the counterweight ball strains the upper sealing cover to keep the communicating hole closed under the action of gravity, the flow passage of the medical liquid is closed at the moment, and the medical liquid is kept, can be used for preventing blood return.
The invention has the following positive effects: firstly, the product has simple structure and convenient operation, changes the current blood return situation of the traditional medical infusion apparatus after the liquid medicine flows and is discharged all the time when the liquid medicine bottle is not replaced or the infusion apparatus is detached in time, avoids the defect that the blood of the body flows back into the infusion tube of the infusion apparatus after the medical liquid medicine is discharged, avoids the risk that the blood which flows back into the infusion apparatus is coagulated into blocks and enters the human body, reduces the occurrence of the condition that the blood vessel is blocked by thrombus, and completely avoids serious medical accidents such as iatrogenic infection, septicemia and the like. The patient is protected safely. The product has the advantages of simple structure, convenient operation, high working and operating efficiency, good blood return prevention effect, wide application range, simple and easy operation of the using method and good social and economic benefits.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the internal structure of the present invention.
Fig. 3 is a schematic structural diagram of the use state of the present invention.
FIG. 4 is a top view of the connection structure of the float ball and the upper sealing cover according to the present invention.
Fig. 5 is a bottom view of the connection structure of the float ball and the upper sealing cover according to the present invention.
Detailed Description
As shown in fig. 1, 2, 3, 4, and 5, a medical blood return prevention device comprises an upper cavity tube 1 and a lower cavity 2 connected with the upper cavity tube 1 through a middle connecting seat 3, wherein the top of the upper cavity tube 1 is communicated with an upper connecting tube 5, the bottom of the lower cavity 2 is communicated with a lower communicating tube 8, a communicating hole 4 is formed in the center of the middle connecting seat 3, a longitudinal limiting rope 16 is movably installed in the communicating hole 4, a counterweight ball 22 is installed at the lower end of the longitudinal limiting rope 16 below the middle connecting seat 3, two sides of the counterweight ball 22 are connected with the inner wall of the lower cavity 2 through a transverse limiting rope 19, an upper sealing cover 15 is installed at the top end of the longitudinal limiting rope 16 above the middle connecting seat 3, and a floating ball 11 is installed above the upper sealing cover 15.
Upper portion chamber pipe 1 be the bottom and be provided with open-ended cylindrical cavity structure, the bottom inner wall of upper portion chamber pipe 1 is through the outer wall upper portion fixed connection of mode and middle part connecting seat 3 of pasting, middle part connecting seat 3 is cylindrical sheet structure, the external diameter of middle part connecting seat 3 and the internal diameter of upper portion chamber pipe 1 mutually support, lower part cavity 2 is that the top is provided with open-ended cylindrical cavity structure, the top inner wall of lower part cavity 2 is through the mode of pasting and the outer wall lower part fixed connection of middle part connecting seat 3, the internal diameter of lower part cavity 2 equals with the internal diameter of upper portion chamber pipe 1, the external diameter of lower part cavity 2 equals with the external diameter of upper portion chamber pipe 1, the length of upper portion chamber pipe 1 is. Upper portion connecting pipe 5 be cylindrical hollow tubular structure, the bottom of upper portion connecting pipe 5 is linked together with the top of upper portion chamber pipe 1, there is first connecting pipe 6 at the top intercommunication of upper portion connecting pipe 5, first external screw thread connection layer 7 has been seted up to the upper portion outer end of first connecting pipe 6, lower part communicating pipe 8 be cylindrical hollow tubular structure, the top of lower part communicating pipe 8 is linked together with the bottom of lower part cavity 2, there is second connecting pipe 9 at the bottom intercommunication of lower part communicating pipe 8, second external screw thread connection layer 10 has been seted up to the lower part outer end of second connecting pipe 9, the pipe diameter of upper portion connecting pipe 5 equals with the pipe diameter of lower part communicating pipe 8, the pipe diameter of first connecting pipe 6 equals with the pipe diameter of second connecting pipe 9.
The intercommunicating pore 4 is circular through-hole structure, vertical spacing rope 16 movable mounting is in intercommunicating pore 4, counter weight ball 22 is circular spheroid structure, the outside parcel at counter weight ball 22 installs counter weight ball protective layer 20, there are two first lantern rings 21 at the bilateral symmetry position fixed mounting of counter weight ball protective layer 20, symmetrical position fixed mounting has two second lantern rings 18 that combine together with two first lantern rings 21 on lower cavity 2 inner wall, the one end of horizontal spacing rope 19 is connected with first lantern ring 21, the other end of horizontal spacing rope 19 is connected with second lantern ring 18, fixed mounting has third lantern ring 17 on the counter weight ball protective layer 20 outer wall of two first lantern ring 21 top intermediate positions, vertical spacing rope 16 low side is connected with third lantern ring 17, the diameter of counter weight ball 22 is not less than the internal diameter of intercommunicating pore 4. The upper sealing cover 15 is of a cover body structure with a groove at the bottom, a fourth sleeve ring 23 is fixedly mounted at the center of the bottom of the upper sealing cover 15, the top end of a longitudinal limiting rope 16 is connected with the fourth sleeve ring 23, a fifth sleeve ring 14 is fixedly mounted at the center of the top of the upper sealing cover 15, a sixth sleeve ring 12 is fixedly mounted at the center of the bottom of the floating ball 11, a floating ball tension rope 13 is fixedly mounted between the fifth sleeve ring 14 and the sixth sleeve ring 12, and the diameter of the upper sealing cover 15 is not smaller than the inner diameter of the communicating hole 4.
The swing included angle of horizontal spacing rope 19 be 60 degrees, the length of horizontal spacing rope 19 is not more than the radius of lower part cavity 2, the length of top position to the low end position of intercommunicating pore 4 of counter weight ball 22 under the effect of free gravity is not more than the length of lower part cavity 2, the extension line of vertical spacing rope 16 and the contained angle of horizontal spacing rope 19 extension line of counter weight ball 22 under the effect of free gravity are 60 degrees, second lantern ring 18 is located the inside intermediate position of lower part cavity 2, first lantern ring 21 is located the outside intermediate position of counter weight ball protective layer 20, counter weight ball protective layer 20 is the hollow spheroid structure of plastics, the inner wall of counter weight ball protective layer 20 cooperatees with the outer wall of counter weight ball 22, counter weight ball protective layer 20 adopts the mode suit of integrative pouring at the outer wall of counter weight ball 22, the distance between the vertical central line of counter weight ball 22 and the lower part cavity 2 inner wall equals with the. The upper sealing cover 15 is made of medical silica gel, the lifting length of the upper sealing cover 15 is equal to that of the counterweight ball 22, the lifting length of the upper sealing cover 15 is equal to the ferrying range of the transverse limiting rope 19, the floating ball 11 is of a spherical hollow structure, the diameter of the floating ball 11 is not smaller than that of the counterweight ball 22, and the top end of the initial position of the floating ball 11 is flush with the lower end of the transverse center line of the upper cavity tube 1.
A method for preventing blood return by using the medical blood return prevention device comprises the following steps: when in use, firstly, the upper connecting pipe 5 is communicated with a medical liquid input pipeline, meanwhile, the lower communicating pipe 8 is communicated with a medical liquid output pipeline, the upper cavity pipe 1 and the lower cavity 2 are horizontally placed, the counterweight ball 22 naturally droops under the action of gravity, the longitudinal limiting rope 16 is in a relaxed state, the upper sealing cover 15 is staggered with the communicating hole 4, the liquid input pipeline and the medical liquid output pipeline are ensured to be vertically arranged at the moment, then the medical liquid input pipeline is opened, the medical liquid flows into the upper connecting pipe 5 from the medical liquid input pipeline under the action of gravity and then flows into the upper cavity pipe 1 from the upper connecting pipe 5, as the communicating hole 4 is in an opened state, the medical liquid smoothly enters the lower cavity 2 from the communicating hole 4, when the medical liquid flow is normal and a small amount of medical liquid is remained in the upper cavity pipe 1 and the lower cavity 2, the upper cavity tube 1 and the lower cavity 2 are returned to a vertical state, at the moment, due to the buoyancy effect of the medical liquid, the floating ball 11 floats in the upper cavity tube 1, after the floating ball 11 floats, along with the continuous injection of the medical liquid, the floating ball 11 drives the upper sealing cover 15 to ascend, the upper sealing cover 15 drives the counterweight ball 22 to ascend through the longitudinal limiting rope 16, meanwhile, the counterweight ball 22 is limited and kept below the communicating hole 4 by the transverse limiting rope 19, the medical liquid is ensured to descend into the lower cavity 2 through the communicating hole 4 and further descend into the liquid output pipeline, when the liquid in the medical liquid input pipeline is vacant, the liquid level of the medical liquid in the upper cavity tube 1 descends along with the floating ball 11, the upper sealing cover 15 descends along with the communicating hole, when the upper sealing cover 15 descends to the middle connecting seat 3, the bottom of the upper sealing cover 15 seals the communicating hole 4, the weight ball 22 pulls the upper sealing cover 15 to close the communicating hole 4 under the action of gravity, and the medical liquid flowing channel is closed, so that the medical liquid is kept in the lower cavity 2 for preventing blood return. The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a medical blood return prevention device, includes upper portion chamber pipe (1), lower part cavity (2) that are connected with upper portion chamber pipe (1) through middle part connecting seat (3), its characterized in that: the top intercommunication of upper portion chamber pipe (1) have upper portion connecting pipe (5), the bottom intercommunication of lower part cavity (2) has lower part communicating pipe (8), central point at middle part connecting seat (3) puts and has seted up intercommunicating pore (4), movable mounting has vertical spacing rope (16) in intercommunicating pore (4), counter weight ball (22) are installed to vertical spacing rope (16) low side of middle part connecting seat (3) below, the both sides of counter weight ball (22) all are connected with the inner wall of lower part cavity (2) through horizontal spacing rope (19), install upper portion sealed lid (15) on vertical spacing rope (16) top of middle part connecting seat (3) top, floater (11) are installed to the top of upper portion sealed lid (15).
2. The medical blood return prevention device according to claim 1, wherein: upper portion chamber pipe (1) be that the bottom is provided with open-ended cylindrical cavity structure, the bottom inner wall of upper portion chamber pipe (1) is through the outer wall upper portion fixed connection of mode and middle part connecting seat (3) of pasting, middle part connecting seat (3) are cylindrical sheet structure, the external diameter of middle part connecting seat (3) is mutually supported with the internal diameter of upper portion chamber pipe (1), lower part cavity (2) are that the top is provided with open-ended cylindrical cavity structure, the top inner wall of lower part cavity (2) is through the mode of pasting and the outer wall lower part fixed connection of middle part connecting seat (3), the internal diameter of lower part cavity (2) equals with the internal diameter of upper portion chamber pipe (1), the external diameter of lower part cavity (2) equals with the external diameter of upper portion chamber pipe (1), the length of upper portion chamber pipe (1) is not less than the length.
3. The medical blood return prevention device according to claim 1 or the above, wherein: upper portion connecting pipe (5) be cylindrical hollow tubular structure, the bottom of upper portion connecting pipe (5) is linked together with the top of upper portion chamber pipe (1), the top intercommunication of upper portion connecting pipe (5) has first connecting pipe (6), first external screw thread articulamentum (7) have been seted up to the upper portion outer end of first connecting pipe (6), lower part communicating pipe (8) be cylindrical hollow tubular structure, the top of lower part communicating pipe (8) is linked together with the bottom of lower part cavity (2), the bottom intercommunication of lower part communicating pipe (8) has second connecting pipe (9), second external screw thread articulamentum (10) have been seted up to the lower part outer end of second connecting pipe (9), the pipe diameter of upper portion connecting pipe (5) equals with the pipe diameter of lower part communicating pipe (8), the pipe diameter of first connecting pipe (6) equals with the pipe diameter of second connecting pipe (9).
4. The medical blood return prevention device according to claim 1 or the above, wherein: the structure is characterized in that the communicating hole (4) is of a circular through hole structure, a longitudinal limiting rope (16) is movably arranged in the communicating hole (4), a counterweight ball (22) is of a circular ball body structure, a counterweight ball protective layer (20) is wrapped and arranged on the outer side of the counterweight ball (22), two first lantern rings (21) are fixedly arranged at symmetrical positions on two sides of the counterweight ball protective layer (20), two second lantern rings (18) combined with the two first lantern rings (21) are fixedly arranged at symmetrical positions on the inner wall of the lower cavity (2), one end of the transverse limiting rope (19) is connected with the first lantern ring (21), the other end of the transverse limiting rope (19) is connected with the second lantern ring (18), a third lantern ring (17) is fixedly arranged on the outer wall of the counterweight ball protective layer (20) at the middle position of the tops of the two first lantern rings (21), the lower end of the longitudinal limiting rope (16) is connected with the third lantern ring (17), the diameter of the counterweight ball (22) is not less than the inner diameter of the communication hole (4).
5. The medical blood return prevention device according to claim 1, wherein: sealed lid (15) of upper portion be the notched lid structure of bottom area, the bottom central point of the sealed lid (15) of upper portion puts fixed mounting has the fourth lantern ring (23), vertical spacing rope (16) top is connected with the fourth lantern ring (23), the sealed lid (15) top central point of upper portion puts fixed mounting has the fifth lantern ring (14), the bottom central point of floater (11) puts fixed mounting has the sixth lantern ring (12), fixed mounting has floater pulling force rope (13) between the fifth lantern ring (14) and the sixth lantern ring (12), the diameter of the sealed lid of upper portion (15) is not less than the internal diameter of intercommunicating pore (4).
6. The medical blood return prevention device according to claim 1 or 4, wherein: the swing included angle of the transverse limiting rope (19) is 60 degrees, the length of the transverse limiting rope (19) is not more than the radius of the lower cavity (2), the length from the top end position of the counterweight ball (22) under the action of free gravity to the lower end position of the communicating hole (4) is not more than the length of the lower cavity (2), the included angle between the extension line of the longitudinal limiting rope (16) and the extension line of the transverse limiting rope (19) of the counterweight ball (22) under the action of free gravity is 60 degrees, the second lantern ring (18) is positioned at the middle position inside the lower cavity (2), the first lantern ring (21) is positioned at the middle position outside the counterweight ball protective layer (20), the counterweight ball protective layer (20) is of a plastic hollow sphere structure, the inner wall of the counterweight ball protective layer (20) is matched with the outer wall of the counterweight ball (22), and the counterweight ball protective layer (20) is sleeved on the outer wall of the counterweight ball (22) in an integrated pouring mode, the distance between the longitudinal center line of the counterweight ball (22) and the inner wall of the lower cavity (2) is equal to the radius of the lower cavity (2).
7. The medical blood return prevention device according to claim 1 or 5, wherein: the upper sealing cover (15) is made of medical silica gel, the lifting length of the upper sealing cover (15) is equal to that of the counterweight ball (22), the lifting length of the upper sealing cover (15) is equal to the length between the ferrying range of the transverse limiting rope (19), the floating ball (11) is of a spherical hollow structure, the diameter of the floating ball (11) is not smaller than that of the counterweight ball (22), and the top end of the initial position of the floating ball (11) is flush with the lower end of the transverse center line of the upper cavity tube (1).
8. A method for preventing blood return using the medical blood return prevention device according to claim 1, characterized in that the blood return prevention method comprises: when the medical liquid infusion device is used, the upper connecting pipe (5) is communicated with a medical liquid input pipeline, the lower communicating pipe (8) is communicated with a medical liquid output pipeline, the upper cavity pipe (1) and the lower cavity (2) are horizontally placed, the counterweight ball (22) naturally droops under the action of gravity, the longitudinal limiting rope (16) is in a relaxed state, the upper sealing cover (15) and the communicating hole (4) are staggered, the liquid input pipeline and the medical liquid output pipeline are vertically arranged at the moment, then the medical liquid input pipeline is opened, medical liquid flows into the upper connecting pipe (5) from the medical liquid input pipeline under the action of gravity, and then flows into the upper cavity pipe (1) from the upper connecting pipe (5), and due to the fact that the communicating hole (4) is in an opened state, the medical liquid smoothly enters the lower cavity (2) from the communicating hole (4), and when the flow rate of the medical liquid is normal and a small amount of the medical liquid is reserved in the upper cavity pipe (1) and the When the medical liquid is empty in the pipeline, the liquid level of the medical liquid in the upper cavity pipe (1) descends along with the descending of the floating ball (11), and the upper sealing cover (15) descends along with the descending of the floating ball (11), when the upper sealing cover (15) descends to the middle connecting seat (3) to contact, the communicating hole (4) is sealed by the bottom of the upper sealing cover (15), the weight ball (22) pulls the upper sealing cover (15) to keep the communicating hole (4) closed under the action of gravity, the medical liquid circulation channel is closed at the moment, and medical liquid is kept in the lower cavity (2) all the time and is used for preventing blood return.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010286503.5A CN111407980A (en) | 2020-04-13 | 2020-04-13 | Medical blood return prevention device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010286503.5A CN111407980A (en) | 2020-04-13 | 2020-04-13 | Medical blood return prevention device and method |
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| CN111407980A true CN111407980A (en) | 2020-07-14 |
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| CN202010286503.5A Pending CN111407980A (en) | 2020-04-13 | 2020-04-13 | Medical blood return prevention device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU212684U1 (en) * | 2022-02-02 | 2022-08-02 | Акционерное общество "Научно-исследовательский институт "Полюс" им. М.Ф. Стельмаха" | drip chamber |
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| CN203355005U (en) * | 2013-06-05 | 2013-12-25 | 大连医科大学附属第二医院 | Novel Murphy dripper infusion device |
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| CN110420364A (en) * | 2019-07-24 | 2019-11-08 | 郑州儿童医院 | Anti-empty transfusion system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU212684U1 (en) * | 2022-02-02 | 2022-08-02 | Акционерное общество "Научно-исследовательский институт "Полюс" им. М.Ф. Стельмаха" | drip chamber |
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Application publication date: 20200714 |