A puncture-proof and pollution-proof urine culture collection device for patients with indwelling urinary catheter

Abstract

The utility model relates to a prevent that stings and prevents pollution urine culture collection device for the patient of indwelling urinary catheter belongs to medical instrument technical field. Including puncture subassembly, prevent backflow flow guide pipe, pre negative pressure liquid storage bottle and spiral seal cover, the puncture subassembly is by puncture needle, protective sleeve and liquid collection needle constitute, the puncture needle needle tail end integrative connection has handheld wing, and the puncture needle needle tip end is equipped with the protective cap, the pipe cavity of prevent backflow flow guide pipe is fixed with one -way valve, and the one -way valve's direction of conduction is from puncture needle points to the liquid collection needle, the pre negative pressure liquid storage bottle includes bottle body and silica gel sealing plug, the spiral seal cover is assembled with the upper end opening outside wall of bottle body through the threaded connection mode, the liquid collection needle is located in the inside of spiral seal cover, and the liquid collection needle needle tail end is equipped with the limit protruding, the utility model can reduce the operation step and the workload of medical staff, and can greatly reduce the specimen pollution probability, guarantees the accuracy of urine culture result.

Description

Technical Field

[0001] This utility model relates to a urine culture and collection device for patients with indwelling urinary catheters that prevents punctures and contamination, and belongs to the field of medical device technology. Background Technology

[0002] In clinical medicine, urine culture is a crucial diagnostic tool for urinary tract infections, identifying causative bacteria, and guiding the rational use of antibiotics. The accuracy of the test results directly determines the direction of the doctor's treatment plan for the patient, thus profoundly affecting the patient's treatment outcome and prognosis. Among these factors, the quality of urine culture specimen collection is a core prerequisite for ensuring the reliability of culture results. This is especially true for patients requiring long-term indwelling catheters, where the standardization of specimen collection and contamination control are more challenging and have a more significant impact on the culture results.

[0003] Currently, the common clinical practice for collecting urine culture specimens from patients with indwelling urinary catheters is the syringe puncture method. This involves healthcare professionals using different types of syringes to puncture the bifurcation of the indwelling catheter and aspirate urine, which is then injected into a specialized specimen container for preservation. However, this method requires each procedure to be performed in an open environment, and the repeated contact between the syringe needle and the catheter puncture site and the specimen container opening significantly increases the probability of external microorganisms invading the specimen. The procedure is cumbersome and carries a high risk of contamination. Furthermore, due to the patient's bedridden position, the urine level and flow within the indwelling catheter are unstable, making it difficult for healthcare professionals to accurately control the aspirated volume, often resulting in the introduction of large amounts of air during aspiration. Furthermore, existing collection methods rely on the combined use of separate and dispersed instruments such as syringes and specimen boxes, without a dedicated integrated collection device. During the operation, the assembly and replacement of instruments are prone to gaps in connection. Moreover, key parts such as syringe needles and specimen box openings lack effective protective structures. During puncture and specimen transfer, the needle is easily contaminated by accidental contact, and the specimen box may leak or be secondary contaminated due to poor sealing, further exacerbating the quality risks and safety hazards in the specimen collection process.

[0004] In summary, current clinical methods for collecting urine culture specimens have significant shortcomings in terms of contamination control, ease of operation, and collection efficiency, making it difficult to meet the clinical needs of patients with indwelling urinary catheters for high-quality and efficient collection of urine culture specimens. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a urine culture collection device for patients with indwelling urinary catheters that prevents punctures and contamination. This invention can reduce the number of operating steps and the workload of medical staff, and can also significantly reduce the probability of specimen contamination, ensuring the accuracy of urine culture results.

[0006] To achieve the above objectives, the present invention provides a puncture-proof and contaminated urine culture collection device for patients with indwelling urinary catheters, comprising a puncture assembly, an anti-backflow guide tube, a pre-negative pressure storage bottle, and a spiral sealing cap. The puncture assembly consists of a puncture needle, a protective sleeve, and a collection needle. The puncture needle and collection needle are respectively fixedly mounted at both ends of the anti-backflow guide tube, and are integrally formed and connected to the anti-backflow guide tube. The puncture needle has a hand-held wing at its tail end, integrally connected to the puncture needle. A protective cap is fitted over the tip of the puncture needle, completely covering the needle tip. The protective sleeve is fitted over the outside of the puncture needle, and the sleeve wall has a straight, hollowed-out groove. A handle is provided on the outer side of the protective sleeve wall; a one-way valve is fixedly installed inside the lumen of the anti-backflow conduit, with the one-way valve guiding from the puncture needle to the collection needle; the pre-negative pressure storage bottle includes a bottle body and a silicone sealing plug, with the silicone sealing plug embedded at the upper opening of the bottle body, and the silicone sealing plug sealingly fitting the inner side wall of the upper opening of the bottle body; the spiral sealing cap is assembled to the outer side wall of the upper opening of the bottle body by a threaded connection, and the spiral sealing cap is located above the silicone sealing plug; the collection needle is located inside the spiral sealing cap, and the tail end of the collection needle has a limiting protrusion, which contacts the inner and outer sides of the top of the spiral sealing cap respectively, and the tip of the collection needle contacts the upper surface of the silicone sealing plug.

[0007] Furthermore, the pre-negative pressure storage bottle is a rigid transparent chamber that has been pre-vacuumed to form a negative pressure, and the outer wall of the pre-negative pressure storage bottle is provided with a capacity scale.

[0008] Moreover, the upper opening of the pre-negative pressure storage bottle body is provided with an outer spiral pattern on the outer side wall, and the inner side wall of the spiral sealing cap is provided with an inner spiral pattern, with the outer spiral pattern matching the inner thread.

[0009] Furthermore, the hand-held wing at the tail end of the puncture needle is located within a straight hollow groove in the wall of the protective sleeve, and both the hand-held wing and the outer surface of the hand-held handle are provided with anti-slip textures.

[0010] Furthermore, the tip of the collecting needle has a beveled structure, the beveled structure is inclined towards the inside of the bottle, and the inner diameter of the collecting needle gradually decreases from the tail end to the tip end.

[0011] Furthermore, the pre-negative pressure storage bottle is made of medical transparent PET, the negative pressure value of the pre-negative pressure storage bottle is -0.05~-0.08MPa, and the capacity of the pre-negative pressure storage chamber is 5-10ml.

[0012] Furthermore, the anti-backflow drainage tube is made of medical-grade transparent soft PVC, and the one-way valve is made of medical-grade silicone.

[0013] Moreover, the inner diameter of the protective sleeve is larger than the outer diameter of the protective cap.

[0014] As can be seen from the above technical solution, the urine culture and collection device for patients with indwelling urinary catheters provided by this utility model has the following advantages over the prior art:

[0015] (1) The technical solution adopted by this utility model integrates the puncture component, the anti-backflow guide tube, the pre-negative pressure storage bottle and the spiral sealing cap to form an integrated structure. Unlike the prior art, it does not require repeated operation with separate syringes and specimen boxes. This greatly simplifies the process of collecting urine culture specimens from patients with indwelling urinary catheters, reduces the workload of medical staff, and avoids the risk of connection omissions caused by multiple operations.

[0016] (2) The technical solution adopted in this utility model is to set a one-way valve in the anti-backflow guide tube, and the conduction direction is limited to from the puncture needle to the collection needle. This can effectively prevent the urine collected in the pre-negative pressure storage bottle from flowing back into the urine tube. At the same time, the double sealing structure of the silicone sealing plug and the spiral sealing cap of the pre-negative pressure storage bottle creates a sterile and closed collection environment, which significantly reduces the probability of external microorganisms invading the specimen and ensures the accuracy of urine culture results.

[0017] (3) The technical solution adopted by this utility model utilizes the negative pressure pre-formed in the pre-negative pressure storage bottle to automatically collect urine without the need for medical staff to manually aspirate. This not only adapts to the state of urine in the catheter when the patient is lying down, but also avoids the problem of a large amount of air being mixed in during the aspiration operation in the prior art, thus protecting the original microbial living environment of the urine specimen. Furthermore, the collection volume can be precisely controlled through the capacity scale of the bottle, thereby improving the quality and efficiency of specimen collection.

[0018] (4) The technical solution adopted in this utility model is to provide a hand wing with anti-slip texture at the end of the puncture needle and a hand handle with anti-slip texture on the outside of the protective sleeve wall, so that medical staff can hold it stably for accurate puncture; at the same time, the tip of the puncture needle is equipped with a protective cap, the protective sleeve is sleeved on the outside of the puncture needle, and the collection needle is matched with the spiral sealing cap through the limiting protrusion. This not only avoids the risk of contamination or accidental contact of the needle when it is not in use, but also allows the two ends of the needle and the spiral sealing cap to be discarded together after collection. The remaining liquid storage bottle sealing structure can ensure that the specimen is not contaminated in the future, taking into account both the safety of operation and the reliability of specimen storage. Attached Figure Description

[0019] Figure 1 This utility model is shown in the overall structural diagram.

[0020] In the diagram: 1. Anti-backflow guide tube; 2. Pre-negative pressure storage bottle; 3. Spiral sealing cap; 4. Puncture needle; 5. Collection needle; 6. Hand-held wing; 7. Protective cap; 8. Protective sleeve; 9. Straight-line hollowed-out groove; 10. Hand handle; 11. One-way valve; 12. Silicone sealing plug; 13. Limiting protrusion; 14. Volume scale. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0022] The present invention provides a device for collecting urine culture from patients with indwelling urinary catheters that prevents punctures and contamination. Figure 1 As shown, the device includes a puncture assembly, an anti-backflow guide tube 1, a pre-negative pressure storage bottle 2, and a spiral sealing cap 3. The puncture assembly consists of a puncture needle 4, a protective sleeve 8, and a collection needle 6. The puncture needle 4 and the collection needle 5 are respectively fixed at both ends of the anti-backflow guide tube 1, and are integrally formed and connected with the anti-backflow guide tube 1. The puncture needle 4 has a hand-held wing 6 at its tail end, which is integrally connected with the puncture needle 4. The tip of the puncture needle 4 is fitted with a protective cap 7, which completely covers the tip of the puncture needle 4. The protective sleeve 8 is fitted on the outside of the puncture needle 4. The wall of the protective sleeve 8 has a straight hollow groove 9, and a hand handle 10 is provided on the outside of the wall of the protective sleeve opposite to the straight hollow groove 9. The anti-backflow... A one-way valve 11 is fixedly installed inside the lumen of catheter 1, and the conduction direction of the one-way valve 11 is from the puncture needle 4 to the collection needle 5; the pre-negative pressure storage bottle 2 includes a bottle body and a silicone sealing plug 12, the silicone sealing plug 12 is embedded in the upper opening of the bottle body, and the silicone sealing plug 12 is sealed to the inner side wall of the upper opening of the bottle body; the spiral sealing cap 3 is assembled to the outer side wall of the upper opening of the bottle body by means of threaded connection, and the spiral sealing cap 3 is located above the silicone sealing plug 9; the collection needle 5 is located inside the spiral sealing cap 3, and the tail end of the collection needle 5 is provided with a limiting protrusion 13, which contacts the inner and outer sides of the top of the spiral sealing cap 3 respectively, and the tip of the collection needle 5 contacts the upper surface of the silicone sealing plug 12.

[0023] Moreover, the pre-negative pressure storage bottle 2 is a rigid transparent chamber that has been pre-vacuumed to form a negative pressure, and the outer wall of the pre-negative pressure storage bottle 2 is provided with a capacity scale 14.

[0024] Moreover, the outer wall of the upper opening of the pre-negative pressure storage bottle body 2 is provided with an outer spiral pattern, and the inner wall of the spiral sealing cap 3 is provided with an inner spiral pattern, with the outer spiral pattern matching the inner thread.

[0025] Furthermore, the hand-held wing at the tail end of the puncture needle 4 is located within the straight hollow groove 9 on the wall of the protective sleeve 8, and both the hand-held wing 6 and the outer surface of the hand-held handle 10 are provided with anti-slip textures.

[0026] Furthermore, the tip of the collection needle 5 is a beveled structure, the beveled structure is inclined towards the inside of the bottle, and the inner diameter of the collection needle 5 gradually decreases from the tail end to the tip end.

[0027] Furthermore, the pre-negative pressure storage bottle 2 is made of medical transparent PET, the negative pressure value of the pre-negative pressure storage bottle 2 is -0.05~-0.08MPa, and the capacity of the pre-negative pressure storage chamber 2 is 10-30ml.

[0028] Furthermore, the anti-backflow guide tube 1 is made of medical transparent soft PVC, and the one-way valve 11 is made of medical silicone.

[0029] Moreover, the inner diameter of the protective sleeve 8 is larger than the outer diameter of the protective cap 7.

[0030] In actual use, medical staff first confirm the integrity and sterility of the urine culture collection device used for patients with indwelling urinary catheters, ensuring it is puncture-proof and prevents contamination. They focus on checking for damage to the pre-negative pressure reservoir bottle and ensuring the silicone sealing plug fits snugly against the top opening of the bottle. Simultaneously, they check the volume markings on the outer wall of the bottle to confirm its empty state, ensuring the device is leak-free, uncontaminated, and meets usage requirements. After inspection, they hold the needle by its anti-slip textured handle at the needle tip and the anti-slip textured handle on the outer wall of the protective sleeve, and slide the needle axially outward along the groove on the protective sleeve. Move the needle tip, capped with a protective cap, out of the protective cannula; then smoothly remove the protective cap from the needle tip, avoiding contact between the needle tip and non-sterile areas to prevent premature contamination. Next, align the exposed needle tip with the designated puncture site of the indwelling urinary catheter, using the anti-slip design of the handle to stabilize and precisely insert the needle into the catheter; then tighten the screw-on sealing cap at the top of the pre-negative pressure reservoir. During tightening, the collecting needle inside the screw-on sealing cap moves downward with the cap, piercing the silicone sealing plug at the bottle opening. Because the pre-negative pressure reservoir is pre-vacuumed... A negative pressure of 0.05~-0.08 MPa is applied. Under this negative pressure, urine in the catheter passes sequentially through the puncture needle, the anti-backflow guide tube, and the collection needle into the reservoir, achieving automated sample collection without manual aspiration and preventing air contamination. Medical staff observe the urine collection volume through the transparent reservoir. Once the required volume is reached, the screw-on sealing cap is loosened in the reverse direction, disengaging the collection needle from the silicone sealing stopper. At this point, the negative pressure disappears, and urine collection ceases. Then, holding the puncture needle by its handle, the needle is withdrawn from the catheter. After withdrawal, the outer side of the protective sheath is held in one hand. Holding one hand of the puncture needle and the other hand of the anti-backflow tube, slide the puncture needle axially inward along the groove on the protective sleeve until the needle tip slides back into the sleeve, completing the collection operation. Finally, discard the used puncture assembly (including the puncture needle, anti-backflow tube, and collection needle) along with the screw-on cap as medical waste according to standard procedures. The pre-negative pressure reservoir, because its silicone seal remains sealed to the bottle, can be directly used as a specimen container and sent to the laboratory for urine culture testing, ensuring the specimen is not contaminated during subsequent transport and testing.

Claims

1. A puncture-proof and contaminated urine culture collection device for patients with indwelling urinary catheters, characterized in that: The device includes a puncture assembly, an anti-backflow guide tube, a pre-negative pressure storage bottle, and a spiral sealing cap. The puncture assembly consists of a puncture needle, a protective sleeve, and a collection needle. The puncture needle and collection needle are fixedly installed at both ends of the anti-backflow guide tube, and are integrally formed and connected to the anti-backflow guide tube. The puncture needle has a hand-held wing at its tail end, integrally connected to the puncture needle. A protective cap is fitted over the tip of the puncture needle, completely covering the tip. The protective sleeve is fitted over the outside of the puncture needle, and the sleeve wall has a straight hollow groove. A hand handle is located on the outside of the sleeve wall opposite to the straight hollow groove. The anti-backflow guide tube... A one-way valve is fixedly installed inside the lumen of the tube, with the conduction direction of the one-way valve pointing from the puncture needle to the collection needle; the pre-negative pressure storage bottle includes a bottle body and a silicone sealing plug, with the silicone sealing plug embedded at the upper opening of the bottle body, and the silicone sealing plug sealingly fitting with the inner side wall of the upper opening of the bottle body; the spiral sealing cap is assembled with the outer side wall of the upper opening of the bottle body by a threaded connection, and the spiral sealing cap is located above the silicone sealing plug; the collection needle is located inside the spiral sealing cap, and the tail end of the collection needle has a limiting protrusion, which contacts the inner and outer sides of the top of the spiral sealing cap respectively, and the tip of the collection needle contacts the upper surface of the silicone sealing plug.

2. The urine culture and collection device for patients with indwelling urinary catheters, as described in claim 1, is characterized in that: The pre-negative pressure storage bottle is a rigid, transparent chamber that has been pre-vacuumed to create negative pressure, and the outer wall of the pre-negative pressure storage bottle is provided with capacity markings.

3. The urine culture and collection device for patients with indwelling urinary catheters, characterized in that: The upper opening of the pre-negative pressure storage bottle has an outer spiral pattern on the outer side wall, and the inner side wall of the spiral sealing cap has an inner spiral pattern. The outer spiral pattern matches the inner spiral pattern.

4. The urine culture and collection device for patients with indwelling urinary catheters, characterized in that: The hand-held wing at the tail end of the puncture needle is located in a straight hollow groove in the wall of the protective sleeve, and both the hand-held wing and the outer surface of the hand-held handle are provided with anti-slip texture.

5. The urine culture and collection device for patients with indwelling urinary catheters, as described in claim 1, is characterized in that: The tip of the collection needle has a beveled structure, with the beveled structure tilted towards the inside of the bottle, and the inner diameter of the collection needle gradually decreases from the tail end to the tip end.

6. The urine culture and collection device for patients with indwelling urinary catheters, characterized in that: The pre-negative pressure storage bottle is made of medical transparent PET, the negative pressure value of the pre-negative pressure storage bottle is -0.05~-0.08MPa, and the capacity of the pre-negative pressure storage chamber is 5~10ml.

7. The urine culture and collection device for patients with indwelling urinary catheters, characterized in that: The anti-backflow drainage tube is made of medical-grade transparent soft PVC, and the one-way valve is made of medical-grade silicone.

8. The puncture-proof and contamination-proof urine culture collection device for patients with indwelling urinary catheters according to claim 1, characterized in that: The inner diameter of the protective sleeve is larger than the outer diameter of the protective cap.

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