CN113080956B

CN113080956B - Blood sampling indwelling needle

Info

Publication number: CN113080956B
Application number: CN202110384002.5A
Authority: CN
Inventors: 黄梅; 朱琦
Original assignee: Zigong First Peoples Hospital
Current assignee: Zigong First Peoples Hospital
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2023-05-02
Anticipated expiration: 2041-04-09
Also published as: CN113080956A

Abstract

A blood collection indwelling needle relates to the technical field of medical equipment, and comprises a needle body part, a joint part and a blood collection part which are connected in sequence; the joint part has a closed state and an open state; the blood sampling portion with connect the portion can dismantle the connection, blood sampling portion with connect the portion when being connected, connect the portion and be open-phase, blood sampling portion with connect the portion when being separated, connect the portion and be closed-phase. The blood sampling indwelling needle can realize win-win protection, and for patients, the puncture times are reduced, so that the patients are protected and the pain is relieved; for nursing staff, the workload can be reduced, and the working efficiency can be improved.

Description

Blood sampling indwelling needle

Technical Field

The invention relates to the technical field of medical equipment, in particular to a blood sampling indwelling needle.

Background

Venous indwelling needles are also known as venous trocars. The core components include a flexible catheter/cannula that can be left in the blood vessel, and a stainless steel puncture guide needle. When in use, the catheter and the needle core are punctured into the blood vessel together, and after the catheter completely enters the blood vessel, the needle core is withdrawn, and only the soft catheter is remained in the blood vessel, so that transfusion treatment is carried out. The use of the detaining needle can reduce the pain of the child patient caused by repeated venipuncture and the fear of needle injection, lighten the dysphoria emotion of parents, facilitate clinical medication, rescue medication of emergency and critical patients, lighten the workload of nurses and reduce the pain of the child patient, so the intravenous detaining needle is widely applied in clinic.

Venous blood sampling is a common care practice in clinical care, and is one of the main techniques for assisting doctors in diagnosing and treating diseases. The current most hospitals use disposable blood taking needles when taking blood, and the disposable blood taking needles are discarded immediately after the blood taking is finished, and puncture blood taking is required to be carried out again if secondary blood is required to be collected again, so that the pain of repeated puncture of patients is obviously increased, and the work load of medical staff is increased.

The venous indwelling needle has the function of blood sampling, so that the puncture frequency of a patient can be reduced, the pain of the patient is further reduced, and the working efficiency is improved. Therefore, there is a need to design an indwelling needle that facilitates blood collection to achieve the above-described objects.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the indwelling needle convenient for blood sampling, so that the venous indwelling needle has the blood sampling function, the puncture times of a patient can be reduced, the pain of the patient is further reduced, and the working efficiency is improved.

In order to achieve the technical purpose, the embodiment of the invention provides a blood collection indwelling needle, which comprises a needle body part, a joint part and a blood collection part which are connected in sequence; the joint part has a closed state and an open state; the blood sampling portion with connect the portion can dismantle the connection, blood sampling portion with connect the portion when being connected, connect the portion and be open-phase, blood sampling portion with connect the portion when being separated, connect the portion and be closed-phase.

Further, the joint part comprises a first shell, a piston and a return spring, wherein the piston and the return spring are positioned in the first shell; one end of the return spring is propped against the piston, and the other end of the return spring is propped against the first shell;

the blood sampling portion comprises a second shell, an inner protrusion is arranged in the second shell, the second shell is detachably connected with the first shell, and when the second shell is connected with the first shell, the front end of the inner protrusion can be propped against the piston.

Further, a conical protrusion is arranged at one side end part of the piston, which faces the second shell; the end of the inner protrusion is provided with a conical groove matched with the conical protrusion.

Further, the blood sampling part further comprises a blood sampling needle which is arranged on the opposite side of the inner protrusion, a through hole communicated with the blood sampling needle is arranged in the inner protrusion, and a plurality of drainage holes which are connected with the through hole and penetrate through the wall of the inner protrusion are also arranged on the inner protrusion.

Further, a protective sleeve is sleeved on the outer side of the blood taking needle, and the protective sleeve is detachably connected with the second shell.

Further, an annular groove and a sealing inner hole are arranged in the first shell, the inner diameter of the annular groove is larger than that of the sealing inner hole, and the annular groove and the sealing inner hole are coaxially arranged;

one end of the piston, which is opposite to the reset spring, is provided with a sealing body which can be in sealing connection with the sealing inner hole; a third sealing ring is arranged on the sealing body; when the third sealing ring moves to be connected with the sealing inner hole, the joint part is in a closed state; when the third sealing ring moves to the annular groove, the joint part is in an open state.

Further, the end of the inner protrusion protrudes toward the side where the joint part is located in a truncated cone shape, the conical groove is arranged at the small end of the truncated cone shape, and the drainage hole is arranged on the inclined side wall of the end of the inner protrusion.

One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:

the blood sampling indwelling needle is simple and quick to operate, and is suitable for patients needing blood sampling and transfusion (provided that the blood sampling specimens are reserved before any drug treatment is carried out on the patients). The blood sampling indwelling needle can realize win-win protection, and for patients, the puncture times are reduced, so that the patients are protected and the pain is relieved; for nursing staff, the workload can be reduced, and the working efficiency can be improved. After blood collection by nursing staff, the joint part can be automatically closed; during transfusion, after the nursing staff is disinfected, the filter end of the transfusion device can be directly connected with the joint part, blood can be returned through transfusion, physiological saline does not need to be injected into the transfusion device for flushing, and consumable waste is reduced. After transfusion is finished, nursing staff can inject normal saline into the joint part, and push the liquid medicine in the extension tube into the human body to realize positive pressure tube sealing;

in one embodiment, in actual use, the viscosity of blood of some patients is higher, the fluidity is poor, and the problem of difficult blood drawing exists. In particular, because in this application scheme, the drainage hole slope sets up the back, does benefit to blood and passes through, so, can be under the unobstructed prerequisite of guaranteeing the blood sampling, further reduction product structure size.

Drawings

Fig. 1 is a schematic view showing a blood collection indwelling needle according to an embodiment of the present invention.

Fig. 2 is a schematic view showing a structure of a connector portion of a blood collection indwelling needle according to an embodiment of the present invention.

Fig. 3 is a schematic view showing a structure of a blood sampling portion in a blood collection indwelling needle according to an embodiment of the present invention.

Fig. 4 is a schematic diagram showing an assembly structure of a connector and a blood collection part in a blood collection indwelling needle according to an embodiment of the present invention.

Description of the reference numerals

1-a needle body, 101-an indwelling connector and 102-an extension tube;

2-joint part, 201-first shell, 202-piston, 203-reset spring, 204-connecting pipe, 205-first sealing ring, 206-second sealing ring, 207-third sealing ring, 208-annular groove, 209-flow hole, 210-conical protrusion, 211-sealed inner hole, 212-sealing body, 213-plug body, 214-containing cavity;

3-blood sampling part, 301-second shell, 302-internal protrusion, 303-conical groove, 304-drainage hole, 305-through hole, 306-blood sampling needle, 307-protective sleeve.

Detailed Description

Other objects and advantages of the present invention will become apparent from the following explanation of the preferred embodiments of the present application.

As shown in fig. 1, a blood collection indwelling needle includes a needle body 1, a connector 2, and a blood collection unit 3 connected in sequence. The needle body 1 is used for puncturing into a vein of a human body, the needle body 1 comprises an indwelling connector 101 and an extension tube 102 connected with the indwelling connector 101, and the indwelling connector 101 is used for being connected with the connector part 2. The joint part 2 has a closed state and an open state, and the joint part 2 is in the open state when the medicine is injected into a human body or blood is taken; when the blood sampling portion 3 or the infusion tube is separated from the connector portion 2, the connector portion 2 is in a closed state, and the outflow of the medicine or blood is avoided. In order to achieve the above function, the blood sampling portion 3 is detachably connected to the joint portion 2, when the blood sampling portion 3 is connected to the joint portion 2, the joint portion 2 is opened, and when the blood sampling portion 3 is separated from the joint portion 2, the joint portion 2 is closed.

The blood sampling indwelling needle is simple and quick to operate, and is suitable for patients needing blood sampling and transfusion (provided that the blood sampling specimens are reserved before any drug treatment is carried out on the patients). The blood sampling indwelling needle can realize win-win protection, and for patients, the puncture times are reduced, so that the patients are protected and the pain is relieved; for nursing staff, the workload can be reduced, and the working efficiency can be improved.

As shown in fig. 2, the joint part 2 includes a first housing 201, a piston 202, and a return spring 203, the piston 202 and the return spring 203 being located inside the first housing 201; one end of the return spring 203 abuts against the piston 202, and the other end abuts against the first housing 201. When blood collection is required, the blood collection part 3 is connected with the joint part 2, the piston 202 is pressed by the blood collection part 3, the reset spring 203 is further compressed, and the joint part 2 is adjusted from a closed state to an open state; when the blood sampling unit 3 is separated from the connector unit 2, the return spring 203 urges the piston 202 to adjust the connector unit 2 from the open state to the closed state.

The piston 202 includes a plug body 213 having a larger diameter and a seal body 212 having a smaller diameter, and the plug body 213 and the seal body 212 are coaxially disposed. The piston 202 is slidable along the axial direction of the housing. The piston 202 has a flow hole 209 formed therein, and the flow hole 209 extends from an end surface of the plug 213 toward the seal 212 and radially extends to an outer contour of the seal 212 at the seal 212. A first seal ring 205 is provided at the outer circumference of the plug body 213 on the side away from the seal body 212, and a second seal ring 206 is provided at the inner hole. A third seal 207 is provided on the outer circumference of the sealing body 212 on the side remote from the plug body 213. Wherein the first sealing ring 205 of the plug 213 is adapted to form a sealing connection with the inner bore of the first housing 201. The second sealing ring 206 of the plug body 213 is used to form a sealing connection with a connecting tube 204. One end of the connection tube 204 is fixedly and hermetically connected to the end of the first housing 201 connected to the needle body 1, and the other end of the connection tube 204 is slidably and hermetically connected to the plug 213. Thus, when the piston 202 slides axially along the first housing 201, the connection tube 204 and the flow hole 209 of the piston 202 can be kept in sealing connection, so that blood or liquid medicine is prevented from entering the cavity in which the return spring 203 is located.

An annular groove 208 and a sealing inner hole 211 are arranged in the first shell 201, the inner diameter of the annular groove 208 is larger than the inner diameter of the sealing inner hole 211, and the annular groove 208 and the sealing inner hole 211 are coaxially arranged. When the piston 202 moves to the position shown in fig. 2, the port of the circulation hole 209 located at the outer circle of the sealing body 212 corresponds to the annular groove 208, the third sealing ring 207 of the sealing body 212 forms a sealing connection with the sealing inner hole 211, and the joint 2 is in a closed state.

In the following description, taking the blood sampling part 3 as an example, when the piston 202 is pressed by the blood sampling part 3, it moves upward, and when the third seal ring 207 moves to the annular groove 208, the third seal ring 207 is deactivated, and the joint part 2 is in an open state. When the blood sampling part 3 is separated from the connector part 2, the return spring 203 pushes the piston 202 to move downwards, and after the third sealing ring 207 forms a sealing connection with the sealing inner hole 211, the liquid in the accommodating cavity 214 (refer to fig. 4) can flow to the extension tube 102 through the flow hole 209, so that the blood of the patient is prevented from flowing into the extension tube 102 again.

After blood collection by a nursing staff, the joint part 2 can be automatically closed; during transfusion, after the nursing staff is disinfected, the filter end of the transfusion device can be directly connected with the joint part 2, blood can be returned through transfusion, physiological saline does not need to be injected into the transfusion device for flushing, and consumable waste is reduced. After the transfusion is completed, the nursing staff can inject physiological saline into the joint part 2, push the liquid medicine in the extension tube 102 into the human body, and realize positive pressure tube sealing.

As shown in fig. 3, the blood sampling unit 3 includes a second housing 301, an inner protrusion 302 is provided in the second housing 301, the second housing 301 is detachably connected to the first housing 201, and when the second housing 301 is connected to the first housing 201, a tip of the inner protrusion 302 can abut against the piston 202, and can abut against an end of the piston 202, thereby compressing the return spring 203.

The piston 202 is provided with a tapered protrusion 210 (refer to fig. 2) toward one side end of the second housing 301; the end of the inner protrusion 302 is provided with a tapered recess 303 matching the tapered protrusion 210. The tapered recess 303 is automatically connected to the tapered protrusion 210 and aligned with the central axis of the two.

The blood sampling part 3 further comprises a blood sampling needle 306, the blood sampling needle 306 is arranged on the opposite side of the inner protrusion 302, a through hole 305 communicated with the blood sampling needle 306 is arranged in the inner protrusion 302, and a plurality of drainage holes 304 connected with the through hole 305 and penetrating through the wall of the inner protrusion 302 are also arranged on the inner protrusion 302. This structure provides the inner protrusion 302 with greater strength, avoiding bending of the inner protrusion 302. The outside cover of blood taking needle 306 is equipped with protective sheath 307, protective sheath 307 with second casing 301 detachable connection, protective sheath 307 can play protection and isolation effect to blood taking needle 306, avoids polluting blood taking needle 306 and blood sample.

As a preferred embodiment, the end of the inner protrusion 302 protrudes in a truncated cone shape toward the side where the joint portion is located, the tapered groove 303 is provided at a small end of the truncated cone shape, and the drainage hole 304 is provided on an inclined sidewall of the end of the inner protrusion 302. In practical use, the blood viscosity of some patients is higher, the mobility is not good, and the problem of difficult blood drawing exists, in this scheme, set up the inside protruding 302 tip as the slope that inclines, and set up drainage hole 304 on this slope, just so that the port of drainage hole 304 is the inclined mouth, the structure of inclined mouth does benefit to the destruction liquid surface tension, does benefit to blood entering blood sampling bottle in the blood sampling process. In particular, because in this application scheme, the drainage hole 304 slope sets up the back, does benefit to blood and passes through, so, can be under the unobstructed prerequisite of guaranteeing the blood sampling, further reduction product structure size.

The apparatus of the present application has been described in detail with reference to the preferred embodiments thereof, however, it should be noted that any adaptations, modifications and variations can be made by persons skilled in the art based on the foregoing disclosure without departing from the spirit of the present application. The present application includes the specific embodiments described above and any equivalents thereof.

Claims

1. A blood collection indwelling needle, which is characterized by comprising a needle body (1), a joint (2) and a blood collection part (3) which are connected in sequence; the joint part (2) has a closed state and an open state; the blood sampling part (3) is detachably connected with the joint part (2), when the blood sampling part (3) is connected with the joint part (2), the joint part (2) is in an open state, and when the blood sampling part (3) is separated from the joint part (2), the joint part (2) is in a closed state;

the joint part (2) comprises a first shell (201), a piston (202) and a return spring (203), wherein the piston (202) is provided with a plug body (213) with a larger diameter and a sealing body (212) with a smaller diameter, the plug body (213) and the sealing body (212) are coaxially arranged, the piston (202) can slide along the axial direction of the shell, a flow hole (209) is arranged in the piston (202), the flow hole (209) extends from the end surface of the plug body (213) to the side of the sealing body (212) and radially extends to the outer contour of the sealing body (212) at the position of the sealing body (212), a first sealing ring (205) is arranged at the outer circle of the plug body (213) at the position far away from the sealing body (212), a second sealing ring (206) is arranged at the inner circle of the sealing body (212) at the position far away from the plug body (213), the first sealing ring (205) is used for forming a sealing connection with the inner hole of the first shell (201), the second sealing ring (206) of the plug body (213) is used for forming a sealing connection with the inner hole of the first shell (201), the second sealing ring (204) is used for forming a sealing connection with the other end (204) of the plug body (201) and can be fixedly connected with the end part of the needle body (201) of the connecting tube (1) in a sliding connection with the sealing connection end part, when the piston (202) axially slides along the first shell (201), the connecting pipe (204) and the circulation hole (209) of the piston (202) can be kept in sealing connection, so that blood or liquid medicine is prevented from entering the cavity where the return spring (203) is located.

2. The blood collection indwelling needle according to claim 1, wherein the piston (202) and the return spring (203) are located inside the first housing (201); one end of the return spring (203) is abutted against the piston (202), and the other end is abutted against the first housing (201).

3. The blood collection indwelling needle according to claim 2, wherein the blood collection portion (3) comprises a second housing (301), an internal protrusion (302) is provided in the second housing (301), the second housing (301) is detachably connected to the first housing (201), and when the second housing (301) is connected to the first housing (201), a tip of the internal protrusion (302) can abut against the piston (202).

4. A blood collection indwelling needle according to claim 3, in which a tapered projection (210) is provided at an end of the piston (202) on a side facing the second housing (301); the end of the inner protrusion (302) is provided with a tapered groove (303) matching the tapered protrusion (210).

5. The blood collection indwelling needle according to claim 4, wherein the blood collection part (3) further comprises a blood collection needle (306), the blood collection needle (306) is provided on the opposite side of the inner protrusion (302), a through hole (305) communicating with the blood collection needle (306) is provided in the inner protrusion (302), and a plurality of drainage holes (304) connected to the through hole (305) and penetrating through the wall of the inner protrusion (302) are further provided in the inner protrusion (302).

6. The blood collection indwelling needle according to claim 5, wherein a protective sheath (307) is provided on the outer side of said blood collection needle (306), and said protective sheath (307) is detachably connected to said second housing (301).

7. The blood collection indwelling needle according to any one of claims 1 to 5, wherein an annular groove (208) and a sealing inner hole (211) are provided in the first housing (201), an inner diameter of the annular groove (208) is larger than an inner diameter of the sealing inner hole (211), and the annular groove (208) is coaxially provided with the sealing inner hole (211).

8. The blood collection indwelling needle according to claim 7, wherein an end of said piston (202) facing away from said return spring (203) is provided with a sealing body (212) capable of being sealingly connected to said sealing inner hole (211).

9. The blood collection indwelling needle according to claim 8, wherein a third seal ring (207) is provided on said sealing body (212); when the third sealing ring (207) moves to be connected with the sealing inner hole (211), the joint part (2) is in a closed state; when the third sealing ring (207) moves to the annular groove (208), the joint part (2) is in an open state, and the shape of the end part connected with the joint part (2) on the needle body part (1) and/or the shape of the end part connected with the blood sampling part (3) on the joint part (2) is matched with the heparin cap.

10. The blood collection indwelling needle according to claim 5, wherein an end of the internal protrusion (302) protrudes in a truncated cone shape toward a side where the joint portion (2) is located, the tapered groove (303) is provided at a small end of the truncated cone shape, and the drainage hole (304) is provided on an inclined side wall of the end of the internal protrusion (302).