CN211536208U

CN211536208U - Three-way joint

Info

Publication number: CN211536208U
Application number: CN201922019764.6U
Authority: CN
Inventors: 简玉梅; 田军; 卫彦伟; 周建; 刘方文
Original assignee: JIANGXI HONGDA MEDICAL EQUIPMENT GROUP CO Ltd
Current assignee: JIANGXI HONGDA MEDICAL EQUIPMENT GROUP CO Ltd; Jiangxi Hongda Medical Equipment Group Ltd Co
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-09-22
Anticipated expiration: 2029-11-21

Abstract

A three-way joint is used in an extracorporeal circulation blood path of hemodialysis and comprises a short cone, wherein the side wall of the short cone protrudes outwards to form a connecting part, the connecting part is connected with a spiral joint, a silica gel sealing gasket is arranged between the spiral joint and the connecting part, and the top of the spiral joint is connected with a protective cap; the connecting part is of a hollow structure, the middle part of the connecting part is provided with a boss, and the boss comprises a supporting part and a bulge arranged on the supporting part; one end of the spiral joint is provided with a fixed cavity connected with the connecting part. The utility model discloses when not using, the periphery of the sealed pad of silica gel is laminated with the bottom in fixed chamber in order to realize sealed, the sealed pressure of short awl is invariable that makes of protective cap simultaneously, the liquid through the short awl can not be excessive promptly, when using, the outer luer of transfusion system/syringe replaces protective cap and interior luer articulate, liquid stream is gone into in the interior luer articulate and is pushed the sealed pad of silica gel, the periphery that the sealed pad of silica gel is crooked to the supporting part, so that interior luer connects, fixed chamber and short awl intercommunication, supply liquid through carrying out clinical treatment.

Description

Three-way joint

Technical Field

The utility model relates to the technical field of medical equipment, in particular to three-way connection.

Background

At present, the prevalence rate of chronic kidney diseases in China exceeds 10%, and most renal failure patients select a renal replacement therapy method to perform hemodialysis. The hemodialysis technology is a nursing technology with strong specificity and complex operation, the safety of each technical operation link is ensured to be the key for guaranteeing the life safety of a patient during hemodialysis treatment, the hemodialysis patient can be maintained for a long time, malnutrition and chronic anemia are caused due to the reduction of immune function, and meanwhile, the complication of infection is easy to occur due to the long-term repeated puncture on blood vessels, the repeated connection and disconnection of the blood in the extracorporeal circulation process and other operation links.

The blood returning machine is an important link of hemodialysis treatment, and two clinical blood returning modes are available at present: (1) basic methods (traditional open blood return method or one-way blood return method); (2) closed blood return method (two-way blood return method, method recommended by standard operating procedures). Although the closed blood returning method is superior to the traditional method, in clinical application, the closed blood returning method has defects and limitations, a filter screen and a bubble monitoring device are not arranged at the front arterial end of a pump of a dialysis pipeline, when the blood is returned by utilizing the physiological saline under the action of gravity, tiny thrombus or air enters a patient body along with the blood, potential damage is caused to the patient, and the probability of blood coagulation of a dialyzer and the pipeline in the blood returning process of the patient in a heparin-free dialysis or blood hypercoagulable state is increased. For patients with excessive arteriovenous collapse pressure, the resistance of the arterial end is greater than the pressure of physiological saline, and blood flows back upwards to the infusion apparatus when the blood pump is shut down, so that a bidirectional closed blood return method cannot be used.

The two blood return methods in the clinical practice of hemodialysis have the phenomenon of improper blood return, are easy to cause various infections, blood seepage and hematoma at puncture sites, air embolism, thrombosis, impotence, dysfunction in sexual intercourse and other complications, increase the risk of occupational exposure and cause low working efficiency.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing a three way connection for in hemodialysis's extrinsic cycle blood way for blood return is more scientific, safe and high-efficient.

A three-way joint is used in an extracorporeal circulation blood path of hemodialysis and comprises a short cone, wherein the side wall of the short cone protrudes outwards to form a connecting part, the connecting part is connected with a spiral joint, a silica gel sealing gasket is arranged between the spiral joint and the connecting part, and the top of the spiral joint is connected with a protective cap;

the connecting part is of a hollow structure, a boss is arranged in the middle of the connecting part, and the boss comprises a supporting part connected with the inner wall of the connecting part and a bulge arranged on the supporting part;

spiral joint's one end be equipped with fixed chamber, the other end that connecting portion are connected be equipped with the interior luer joint that the protective cap is connected, be equipped with the part of stopping in the interior luer joint, the silica gel is sealed to be located in the fixed chamber and middle part quilt the part of stopping blocks and arch are blocked, the periphery that the silica gel was sealed fills up with the bottom laminating of fixed chamber, when using, the outer luer joint of transfusion system/syringe replaces protective cap and interior luer joint to be connected, and liquid stream advances in the interior luer joint and extrudees the silica gel sealed pad, the periphery that the silica gel was sealed fill up to the supporting part is crooked, so that interior luer joint, fixed chamber and short awl intercommunication supply liquid through carrying out clinical treatment.

Compared with the prior art, among the three way connection, when not using, the sealed periphery of silica gel with the bottom laminating in fixed chamber is in order to realize sealed, and the sealed messenger of protective cap simultaneously short awl internal pressure is invariable, and the liquid through the short awl can not be excessive promptly, and when using, the outer luer of transfusion system/syringe connects and replaces protective cap and interior luer articulate, and liquid flow advances in the interior luer connects and extrudees the sealed pad of silica gel, the sealed periphery of silica gel to the supporting part is crooked, so that interior luer connects, fixed chamber and short awl intercommunication supply liquid through carrying out clinical treatment. In addition, the interface of pre-flushing saline is closer to the arterial puncture end of the human body when blood is returned in hemodialysis, the whole dialysis pipeline is ensured to be in a sealing state, the probability of generating thrombus to flow back into the human body in the dialysis process is reduced, and air or thrombus generated by blood coagulation is prevented from flowing back into the human body. Provides guarantee for safe hemodialysis, is convenient for medical personnel to pre-flush according to the requirements of hemodialysis standard operating procedures, has simple structure and convenient operation, and can be used in various three-way connectors.

Furthermore, the blocking part is of a straight-line-shaped structure.

Furthermore, one end of the protective cap is provided with a threaded hole, an external luer connector is arranged in the threaded hole, the threaded hole is connected with the outer wall of the spiral connector, and the external luer connector is connected with the internal luer connector.

Furthermore, one end of the short cone is provided with a connecting pipe opening connected with the hose, the other end of the short cone is connected with the screw cap, and an external connecting seat is clamped between the screw cap and the short cone for connection.

Furthermore, a guide cone part is arranged on the outer wall of one end, facing the screw cap, of the short cone, and a clamping groove is formed between the guide cone part and the connecting part;

one end of the spiral cap facing the short cone is provided with a guide hole, the other end of the spiral cap is provided with a spiral hole, and a step is arranged between the spiral hole and the guide hole;

the end face of the connecting seat is provided with a connecting hole connected with the short cone, the outer wall of the connecting seat is provided with a thread connected with the spiral hole, and the guide hole passes over the guide cone to enable the step to be clamped in the clamping groove.

Furthermore, the outer wall of the end, provided with the pipe connecting port, of the short cone is provided with a plurality of convex ribs, and the convex ribs are arranged along the axis direction of the short cone.

Drawings

Fig. 1 is a schematic sectional view of a three-way joint according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the short cone of FIG. 1;

fig. 3 is a top view of the screw joint of fig. 1.

Description of the main element symbols:

short awl 10	Connecting part 101
		Boss 102	Support part 1021
Protrusion 1022	Nozzle 103
		Guide cone 104	Card slot 105
Convex rib 106	Screw joint 11
		Fixed cavity 111	Female luer fitting 112
Barrier 113	Silicone rubber gasket 12
		Protective cap 13	Screw hole 131
Male luer fitting 132	Screw cap 14
		Guide hole 141	Spiral hole 142
Step 143	Connecting socket 15
		Connection hole 151	152

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, an embodiment of the present invention provides a three-way joint for an extracorporeal circulation blood circuit of hemodialysis, including a short cone 10, a connecting portion 101 protruding outward from a side wall of the short cone 10, the connecting portion 101 being connected to a screw joint 11, a silica gel sealing gasket 12 being disposed between the screw joint 11 and the connecting portion 101, and a protective cap 13 being connected to a top of the screw joint 11.

Referring to fig. 2, the connecting portion 101 is a hollow structure, a boss 102 is disposed in the middle of the connecting portion, the boss 102 includes a supporting portion 1021 connected to an inner wall of the connecting portion 101, and a protrusion 1022 disposed on the supporting portion 1021, and the protrusion 1022 is used for supporting the silicone gasket 12.

Referring to fig. 1, one end of the spiral connector 11 is provided with a fixing cavity 111 connected to the connecting portion 101, the other end of the spiral connector is provided with a luer connector 112 connected to the protective cap 13, a blocking portion 113 is disposed in the luer connector 112, the silicone gasket 12 is disposed in the fixing cavity 111, the middle of the silicone gasket is clamped by the blocking portion 113 and the protrusion 1022, and the periphery of the silicone gasket 12 is attached to the bottom of the fixing cavity 111.

It should be noted that, in this embodiment, when not in use, the periphery of the silicone gasket 12 is attached to the bottom of the fixing cavity 111 to achieve sealing, and the sealing of the protective cap 13 makes the pressure inside the short cone 10 constant, that is, the liquid passing through the short cone 10 does not overflow, when in use, the external luer of the infusion set/syringe is connected to the internal luer 112 instead of the protective cap, the liquid flows into the internal luer 112 and presses the silicone gasket 12, and the periphery of the silicone gasket 12 is bent toward the supporting portion 1021 to communicate the internal luer 112, the fixing cavity 111 and the short cone 10, so that the liquid can pass through clinical treatment.

Referring to fig. 1 and 3, the blocking portion 113 has a "straight" structure, and is configured such that, in use, the female luer 112 is communicated with the fixing cavity 111 from both sides of the blocking portion 113.

Referring to fig. 1, a threaded hole 131 is formed at one end of the protective cap 13, an external luer 132 is disposed in the threaded hole 131, the threaded hole 131 is connected to the outer wall of the screw connector 11, and the external luer 132 is connected to the internal luer 112, so that the screw connector 11 is sealed, and when not in use, the screw connector 11 is not in communication contact with the outside.

Furthermore, one end of the short cone 10 is provided with a connection pipe 103 connected with a hose, the other end of the short cone is connected with the screw cap 14, and an external connection seat 15 is clamped between the screw cap 14 and the short cone 10.

Referring to fig. 1, a guiding taper part 104 is arranged on an outer wall of the short cone 10 facing one end of the screw cap 14, and a clamping groove 105 is formed between the guiding taper part 104 and the connecting part 101;

one end of the screw cap 14 facing the short cone 10 is provided with a guide hole 141, the other end is provided with a screw hole 142, and a step 143 is arranged between the screw hole 142 and the guide hole 141;

the end face of the connecting base 15 is provided with a connecting hole 151 connected with the short cone 10, the outer wall is provided with a thread 152 connected with the spiral hole 142, and the guide hole 141 passes over the guide cone 104 so that the step 143 is clamped in the clamping groove 105.

Specifically, when the step 143 slides over the guiding cone 104, the step 143 is locked into the locking groove 105, and at this time, the screw cap 14 cannot slide off and release from the short cone 10, so as to achieve the locking function. After the short cone 10 and the screw cap 14 are assembled, the short cone is connected with the external connecting base 15 through the screw hole 142, the screw cap 14 is screwed in time, so that the screw cap 14 drives the external connecting base 15, and the connecting hole 151 of the external connecting base 15 is connected with the short cone 10 until the matching is firm; when the external connection seat 15 needs to be withdrawn, the screw cap 14 is screwed out reversely, so that the screw cap 14 drives the external connection seat 15, and the connection hole 151 of the external connection seat 15 is loosened from the short cone 10. The puncture needle is convenient to separate from the short cone 10, and the short cone can be effectively prevented from being broken due to manual force when the screw cap 14 is screwed or unscrewed.

Referring to fig. 2, a plurality of ribs 106 are disposed on the outer wall of the end of the short cone 10 where the nozzle 103 is disposed, and the ribs 106 are disposed along the axial direction of the short cone 10 for preventing slipping and facilitating the operation of medical staff.

What further need explain, three way connection is used for needing clinical three-dimensional liquid flow direction to use, is used for the extracorporeal circulation blood circuit of the blood purification usefulness of hemodialysis usefulness very much, and the interface of pre-flush saline when making hemodialysis return blood more is close to human artery puncture end, and is in encapsulated situation in the whole dialysis pipeline of guarantee, has reduced the probability that produces the thrombus reflux and advances the human body among the dialysis process, avoids the air or because of the thrombus reflux that the blood coagulation produced in the human body. Provides guarantee for safe hemodialysis, is convenient for medical personnel to pre-flush according to the requirements of hemodialysis standard operating procedures, has simple structure and convenient operation, and can be used in various three-way connectors.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A three-way joint is used in an extracorporeal circulation blood circuit of hemodialysis, and is characterized in that: the device comprises a short cone, wherein a connecting part is formed by protruding outwards on the side wall of the short cone, the connecting part is connected with a spiral joint, a silica gel sealing gasket is arranged between the spiral joint and the connecting part, and the top of the spiral joint is connected with a protective cap;

2. The three-way joint according to claim 1, wherein the blocking portion has a line-shaped structure.

3. The three-way connector according to claim 1, wherein one end of the protective cap is provided with a threaded hole in which a male luer connector is provided, the threaded hole is connected with an outer wall of the screw connector and the male luer connector is connected with a female luer connector.

4. The three-way joint according to claim 1, wherein one end of the short cone is provided with a connecting pipe port connected with a hose, the other end of the short cone is connected with a screw cap, and an external connecting seat is clamped between the screw cap and the short cone.

5. The three-way joint according to claim 4, wherein a guiding cone part is arranged on the outer wall of the short cone facing to one end of the screw cap, and a clamping groove is formed between the guiding cone part and the connecting part;

6. The three-way joint according to claim 4, wherein a plurality of ribs are provided on an outer wall of the end of the short cone where the nipple is provided, the ribs being provided along an axial direction of the short cone.