Needle tube retraction type venous blood sampling indwelling needle

Abstract

The utility model relates to the technical field of medical instruments, in particular to a needle tube retraction type venous blood sampling indwelling needle which comprises a guide cylinder, a catheter seat and a catheter, the guide cylinder is communicated with one end of the catheter seat, the other end of the catheter seat is communicated with the catheter, the needle tube retraction type venous blood sampling indwelling needle is characterized by further comprising a sliding sleeve and a puncture steel needle, and the puncture steel needle is connected with the sliding sleeve. The sliding sleeve is connected with the guide cylinder in a sleeved mode, and the puncture steel needle slides in the guide cylinder, the catheter base and the catheter. A guide hole is formed in the guide cylinder, and the sliding sleeve can slide along the guide hole; a clamping groove is formed in one end of the guide cylinder, and an elastic piece matched with the clamping groove is arranged on the inner side of the sliding sleeve. And a sterile application is arranged on the catheter seat. After blood sampling is finished, the puncture steel needle retracts, so that the needle head is prevented from being exposed outside, and puncture injury is avoided; the sterile application arranged on the catheter is used for being attached to the skin of a patient, fixation during blood sampling is facilitated, a needle head is prevented from shifting and falling off, and meanwhile the situation that blood vessels of the patient are punctured and punctured is prevented; the needle head end of the puncture steel needle is slightly thick, so that drainage during blood sampling is facilitated, and the problems of pseudohemolysis and high blood potassium content caused by blood sampling are avoided; after blood sampling is finished, intravenous infusion treatment can be carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a needle tube retractable venous blood sampling indwelling needle. Background Art

[0002] Venous blood collection technology is widely used in clinical medicine. Through venous blood collection technology, various components in human blood can be obtained to help doctors judge the patient's condition and formulate plans. At present, our hospital mostly uses split (catheter) venous blood collection needles, which are composed of protective caps, puncture needles, needle holders (also single-wing handles), catheters, connecting seats, blood collection needle holders, blood collection needles, and blood blocking sleeves.

[0003] At present, the puncture needle is directly exposed to the outside after the blood collection needle is removed at the end of blood collection, which greatly increases the risk of needle stick injuries to others and also increases the risk of infection and transmission of blood-borne diseases.

[0004] Clinically, patients often need to perform venous blood sampling and intravenous infusion at the same time. Using a blood collection needle and an indwelling needle separately requires puncturing the patient's veins twice, which increases the patient's pain. Blood collection with an indwelling needle often causes hemolysis, and a too-thin indwelling needle can also cause false hyperkalemia. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a needle tube retractable venous blood sampling indwelling needle, which can effectively solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is: a needle tube retractable venous blood sampling indwelling needle, including a guide tube, a catheter seat and a catheter, the guide tube is connected with one end of the catheter seat, and the other end of the catheter seat is connected with the catheter, and it is characterized in that it also includes a sliding sleeve and a puncture steel needle, the puncture steel needle is connected with the sliding sleeve, the sliding sleeve is sleeved with the guide tube, and the puncture steel needle slides in the guide tube, the catheter seat and the catheter; a guide hole is provided on the guide tube, and the sliding sleeve can slide along the guide hole; a card slot is provided at one end of the guide tube, and a spring sheet cooperating with the card slot is provided on the inner side of the sliding sleeve; a sterile dressing is provided on the catheter seat.

[0007] Preferably, an extension tube is connected to one side of the catheter seat, and one end of the extension tube is connected to a transparent connecting seat and a needle seat in sequence; one end of the needle seat is connected to a blood collection needle, a rubber sleeve and a protective cover, the needle seat and the transparent connecting seat are detachably connected, the rubber sleeve is arranged on the periphery of the blood collection needle, and the protective cover is arranged on the periphery of the blood collection needle.

[0008] Preferably, the length of the protective cover is 5-7 cm, and the length of the protective cover is at least 1 cm longer than the length of the blood collection needle; the diameter of the protective cover is greater than 2 cm, and the protective cover is made of transparent material.

[0009] Preferably, a tube sealing clamp is provided on the extension tube.

[0010] Preferably, the sliding sleeve is provided with butterfly wings.

[0011] Preferably, the nominal outer diameter of the catheter is 0.8 mm.

[0012] Compared with the prior art, the utility model provides a needle tube retractable venous blood collection indwelling needle, which has the following beneficial effects:

[0013] After the blood collection is completed, the puncture needle retracts to avoid the needle tip being exposed and needle puncture injuries.

[0014] The sterile dressing provided on the catheter seat is used to stick to the patient's skin to facilitate fixation during blood collection, prevent the needle from shifting and falling out, and prevent puncture of the patient's blood vessels and needle stick injuries;

[0015] The puncture needle tip is slightly thicker, which is convenient for drainage during blood collection and avoids the problems of false hemolysis and high blood potassium caused by blood collection.

[0016] According to the specific situation of the patient, venous blood sampling or intravenous fluid replacement can be performed for the patient through a transparent connecting seat to avoid secondary puncture and increase the pain of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model;

[0019] Figure 3 It is a disassembled schematic diagram of part of the structure of the utility model;

[0020] Figure 4 It is a partial structural cross-sectional view of the utility model.

[0021] Among them: 1. guide cylinder, 11. guide hole, 12. slot, 21. catheter seat, 22. catheter, 3. sliding sleeve, 31. butterfly wing, 4. puncture needle, 5. sterile dressing, 61. extension tube, 62. transparent connecting seat, 63. needle seat, 64. rubber sleeve, 7. blood collection needle, 8. protective cover, 9. tube sealing clamp. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-4The utility model provides a needle tube retractable venous blood sampling indwelling needle, comprising a guide cylinder 1, a catheter seat 21 and a catheter 22, wherein the guide cylinder 1 is connected to one end of the catheter seat 21, and the other end of the catheter seat 21 is connected to the catheter 22, and is characterized in that it also comprises a sliding sleeve 3 and a puncture steel needle 4, wherein the puncture steel needle 4 is connected to the sliding sleeve 3, the sliding sleeve 3 is sleeved with the guide cylinder 1, and the puncture steel needle 4 slides in the guide cylinder 1, the catheter seat 21 and the catheter 22; a guide hole 11 is provided on the guide cylinder 1, and the sliding sleeve 3 can slide along the guide hole 11; a card slot 12 is provided at one end of the guide cylinder 1, and a spring sheet cooperating with the card slot 12 is provided on the inner side of the sliding sleeve 3; a sterile dressing 5 is provided on the catheter seat 21.

[0024] The sterile dressing 5 is arranged on one side of the catheter seat 21. The sterile dressing 5 is foldable. When the dressing substrate under the sterile dressing 5 is peeled off to expose its sticky surface, the sterile dressing 5 can be unfolded to fix the blood collection needle to the patient's skin to prevent the needle from shifting and falling out, and at the same time prevent piercing the patient's blood vessels and needle stick injuries; the nominal outer diameter of the catheter 22 is 0.8 mm, which avoids problems such as false hemolysis and high blood potassium caused by blood collection.

[0025] Preferably, one side of the catheter seat 21 is connected to an extension tube 61, and one end of the extension tube 61 is connected to a transparent connecting seat 62 and a needle seat 63 in sequence; one end of the needle seat 63 is connected to a blood collection needle 7, a rubber sleeve 64 and a protective cover 8, and the needle seat 63 and the transparent connecting seat 62 are detachably connected, the rubber sleeve 64 is arranged on the periphery of the blood collection needle 7, and the protective cover 8 is sleeved on the periphery of the blood collection needle 7.

[0026] The blood collection needle 7 is connected to the needle seat 63, the rubber sleeve 64 and the protective cover 8 as a whole. After blood collection, the needle seat 63 can be separated from the transparent connecting seat 62, and the needle seat 63, the rubber sleeve 64 and the protective cover 8 can be separated and discarded together; after separation, the interface end of the transparent connecting seat 62 can be directly connected to a positive pressure connector or an intravenous infusion set.

[0027] Preferably, the length of the protective cover 8 is 6 cm, which is at least 1 cm longer than the length of the blood collection needle 7; the diameter of the protective cover 8 is greater than 2 cm, and the protective cover 8 is made of transparent material.

[0028] Preferably, a tube sealing clamp 9 is provided on the extension tube 61 .

[0029] Preferably, the sliding sleeve 3 is provided with a butterfly wing 31 .

[0030] Preferably, the nominal outer diameter of the catheter 22 is 0.8 mm.

[0031] As a specific embodiment of the utility model:

[0032] The blood collection needle 7 is connected to the puncture steel needle 4 as a whole through the needle seat 63, the transparent connecting seat 62, the extension tube 61, the catheter seat 21 and the guide tube 1. The puncture steel needle 4 is used to puncture the patient's veins, and the blood collection needle 7 is used to connect the blood collection tube. When in use, puncture is performed through the puncture steel needle 4. After the puncture of the blood vessel is completed, the sliding sleeve 3 is slid toward the rear end of the catheter 22, and the sliding sleeve 3 drives the puncture steel needle 4 to retract into the catheter 22, the catheter seat 21 or the guide tube 1; if the blood vessel is not punctured well for the first time, it can be pushed again Slide the sleeve 3, send the puncture needle 4 out of the catheter 22 for another puncture. When it is confirmed that the puncture of the blood vessel is successful, slide the sleeve 3 to the end of the guide tube 1. When the spring piece on the inner side of the sleeve 3 is engaged with the slot 12 of the guide tube 1, a click sound can be heard. At this time, the sleeve 3 and the puncture needle 4 can no longer slide back and forth. At this time, the puncture needle 4 is completely retracted into the guide tube 1. When the indwelling needle is discarded, the puncture needle 4 will not be exposed to the outside and will not injure others, thereby reducing the risk of infection and transmission of blood-borne diseases.

[0033] Referring to 2, from the perspective of hospital infection and cost, this application changes the original double-chamber to a single-chamber, that is, after the improvement, the single-chamber only needs to be connected to one connector, and maintenance only requires flushing one chamber.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A needle tube retractable venous blood sampling indwelling needle, comprising a guide tube (1), a catheter seat (21) and a catheter (22), wherein the guide tube (1) is connected to one end of the catheter seat (21), and the other end of the catheter seat (21) is connected to the catheter (22), characterized in that: The invention also comprises a sliding sleeve (3) and a puncture steel needle (4), wherein the puncture steel needle (4) is connected to the sliding sleeve (3), the sliding sleeve (3) is sleeved with the guide cylinder (1), and the puncture steel needle (4) slides in the guide cylinder (1), the catheter seat (21) and the catheter (22); a guide hole (11) is provided on the guide cylinder (1), and the sliding sleeve (3) can slide along the guide hole (11); a slot (12) is provided at one end of the guide cylinder (1), and a spring sheet cooperating with the slot (12) is provided on the inner side of the sliding sleeve (3); and a sterile dressing (5) is provided on the catheter seat (21).

2. The needle tube retractable venous blood sampling indwelling needle according to claim 1, characterized in that: One side of the catheter seat (21) is connected to an extension tube (61), and one end of the extension tube (61) is connected to a transparent connection seat (62) and a needle seat (63) in sequence; one end of the needle seat (63) is connected to a blood collection needle (7), a rubber sleeve (64) and a protective cover (8), the needle seat (63) and the transparent connection seat (62) are detachably connected, the rubber sleeve (64) is arranged on the outer periphery of the blood collection needle (7), and the protective cover (8) is sleeved on the outer periphery of the blood collection needle (7).

3. The needle tube retractable venous blood sampling indwelling needle according to claim 2, characterized in that: The length of the protective cover (8) is 5-7 cm, and the length of the protective cover (8) is at least 1 cm longer than the length of the blood collection needle (7); the diameter of the protective cover (8) is greater than 2 cm, and the protective cover (8) is made of a transparent material.

4. The needle tube retractable venous blood sampling indwelling needle according to claim 2, characterized in that: The extension tube (61) is provided with a tube sealing clamp (9).

5. The needle tube retractable venous blood sampling indwelling needle according to claim 1, characterized in that: The sliding sleeve (3) is provided with a butterfly wing (31).

6. The needle tube retractable venous blood collection indwelling needle according to claim 1, characterized in that: The nominal outer diameter of the catheter (22) is 0.8 mm.

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