Extension device of remaining needle for dialysis

Abstract

The extension device comprises a dialysis remaining needle connecting pipe, one end of the dialysis remaining needle connecting pipe is connected with one end of a hard pipe in a sealed mode, and the other end of the hard pipe is connected with one end of a second extension pipe hose in a sealed mode. A clamping and closing device for closing or opening a passage in the second extension tube hose is arranged on the outer side of the second extension tube hose, and a silica gel blood sampling opening is formed in the middle of one side of the hard tube. The remaining needle for dialysis is easy to operate, the remaining needle for dialysis is lengthened, the clamping function is added, blood loss of a patient in nursing operation is effectively avoided, the silica gel blood sampling opening is additionally arranged, blood sampling of the patient is facilitated, and the two hands of medical staff are prevented from being polluted by the blood of the patient.

Description

Technical Field

[0001] The utility model relates to an extension device for a dialysis indwelling needle, belonging to the technical field of medical products. Background Art

[0002] Hemodialysis patients need blood purification three times a week, and the most common vascular access is the arteriovenous fistula. In order to better protect the patient's blood vessels, dialysis indwelling needles are commonly used in clinical practice. However, dialysis indwelling needles are completely different from the commonly used infusion indwelling needles in clinical practice. The disadvantages of dialysis indwelling needles are that they are very short and thick and have no clamping device, such as Figure 1 shown.

[0003] Years of clinical operations have revealed the disadvantages of indwelling needles. Indwelling needles used for dialysis have no clamping device and are very short. When drawing blood, injecting anticoagulants and removing the machine, the indwelling needle needs to be folded back or clamped with a vascular clamp before the next step can be performed. This process can easily cause the indwelling needle to slip or rupture, resulting in blood loss for the patient. Summary of the invention

[0004] The technical problem to be solved by the utility model is: how to prevent the dialysis indwelling needle from slipping or rupturing during blood sampling, anticoagulant injection and disembarkation, thereby preventing the patient from losing blood.

[0005] In order to solve the above technical problems, the technical solution of the utility model is to provide an extension device for a dialysis indwelling needle, which is characterized in that it includes a dialysis indwelling needle connecting tube, one end of the dialysis indwelling needle connecting tube is sealedly connected to one end of a hard tube, and the other end of the hard tube is sealedly connected to one end of a second extension tube hose, and a clamping device for closing or opening the passage in the second extension tube hose is provided on the outside of the second extension tube hose, and a silicone blood collection port is provided in the middle position of one side of the hard tube.

[0006] Preferably, the outer side of the other end of the dialysis indwelling needle connecting tube is sealedly connected with a dialysis indwelling needle connecting end cap for tightly and sealingly connecting with the end of the dialysis indwelling needle.

[0007] Preferably, the dialysis indwelling needle connection end cover is a sleeve-type structure, and an internal thread is provided on the inner wall of the dialysis indwelling needle connection end cover; the internal thread on the inner wall of the dialysis indwelling needle connection end cover is connected to the threaded protrusion on the outer side of the dialysis indwelling needle end through a threaded fastening and sealing connection.

[0008] Preferably, an outer wall of the other end of the second extension tube hose is provided with an external thread for connecting to a disposable sterile blood circuit for dialysis.

[0009] Preferably, a loop connection end cover is sleeved on the outer side of the other end of the second extension tube hose, and the loop connection end cover is a sleeve-type structure.

[0010] Preferably, an internal thread is provided on the inner wall of the circuit connection end cover; the internal thread of the inner wall of the circuit connection end cover is matched and connected with the external thread of the disposable sterile blood circuit connection end for dialysis.

[0011] Preferably, the side of the hard tube facing the silicone blood collection port is a closed structure; the silicone blood collection port is provided with a silicone material that allows the syringe to be inserted and automatically closed after being pulled out.

[0012] Preferably, the location where the silicone blood collection port is arranged in the hard tube is a cylindrical structure, and the cylindrical structure is tightly filled with silicone material.

[0013] The utility model provides a safe and convenient indwelling needle extension device, which is used for clinical nursing and hemodialysis patients who are punctured by indwelling needles for arteriovenous fistula dialysis, and effectively reduces the risk of blood loss in patients.

[0014] The utility model is easy to operate, extends the indwelling needle for dialysis, increases the clamping function, and effectively avoids the patient's blood loss during nursing operations. In addition, a silicone blood collection port is added to facilitate blood collection for the patient and avoid the patient's blood from contaminating the hands of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of an existing dialysis indwelling needle;

[0016] Figure 2 It is a schematic diagram of the structure of an extension device for a dialysis indwelling needle;

[0017] Figure 3 It is a partially exploded schematic diagram of an extension device for a dialysis indwelling needle;

[0018] Figure 4 This is a schematic diagram of installing a dialysis indwelling needle extension device on a dialysis indwelling needle. DETAILED DESCRIPTION

[0019] In order to make the present invention more obvious and easy to understand, preferred embodiments are described in detail as follows in conjunction with the accompanying drawings.

[0020] The utility model provides an extension device for a dialysis indwelling needle, such as Figure 2As shown, it includes a dialysis indwelling needle connecting tube 2, one end of the dialysis indwelling needle connecting tube 2 is sealed and connected to one end of a hard tube 3, the outer side of the other end of the dialysis indwelling needle connecting tube 2 is sealed and connected to a dialysis indwelling needle connecting end cap 1 for fastening and sealing connection with the end of the dialysis indwelling needle 10, the other end of the hard tube 3 is sealed and connected to one end of a second extension tube hose 6, the outer wall of the other end of the second extension tube hose 6 is provided with an external thread for connecting a disposable sterile blood circuit for dialysis, and the outer side of the other end of the second extension tube hose 6 is sleeved with a circuit connection end cap 9, and the circuit connection end cap 9 is a sleeve-type structure. A silicone blood sampling port 4 is provided in the middle position of one side of the hard tube 3, which is used to insert a syringe into the hard tube 3 for blood sampling. The side of the hard tube 3 facing the silicone blood sampling port 4 is a closed structure, and because the material of the hard tube 3 is relatively hard, when the syringe is inserted into the silicone blood sampling port 4, it will not pierce the tube wall of the hard tube 3. A clamping device 7 is provided on the outside of the second extension tube hose 6, which is used to open or close the passage in the second extension tube hose 6, so as to close or open the passage between the dialysis indwelling needle 10 and the disposable sterile blood circuit for dialysis. The external thread on the outer wall of the other end of the second extension tube hose 6 is matched and connected with the internal thread in the disposable sterile blood circuit for dialysis.

[0021] like Figure 3 As shown, the circuit connection end cap 9 is a detachable structure, which is used to protect the interface position and prevent dust, and this structure can be omitted. In this embodiment, the inner wall of the circuit connection end cap 9 is provided with an internal thread; the internal thread of the inner wall of the circuit connection end cap 9 is matched and connected with the external thread of the disposable sterile blood circuit connection end for dialysis.

[0022] The dialysis indwelling needle connection end cap 1 and the circuit connection end cap 9 are both sleeve-type structures, and the inner walls of the dialysis indwelling needle connection end cap 1 and the circuit connection end cap 9 are both provided with internal threads. The internal threads on the inner wall of the dialysis indwelling needle connection end cap 1 are fastened with the threaded protrusion 11 on the outer side of the end of the dialysis indwelling needle 10 by threads, and when the end of the dialysis indwelling needle 10 is rotated to the bottom of the dialysis indwelling needle connection end cap 1 and abuts against the bottom of the dialysis indwelling needle connection end cap 1, a sealed connection is achieved. The internal threads on the inner wall of the circuit connection end cap 9 are matched and connected with the external threads of the disposable sterile blood circuit connection end for dialysis.

[0023] In this embodiment, the clamping device 7 is a stop clamp. One end of the dialysis indwelling needle connection tube 2 passes through the bottom of the dialysis indwelling needle connection end cap 1 and is inserted into the end of the dialysis indwelling needle 10; the other end of the second extension tube hose 6 passes through the bottom of the circuit connection end cap 9 and is screwed into the disposable sterile blood circuit for dialysis through a thread.

[0024] The location where the silicone blood sampling port 4 is set in the hard tube 3 is a cylindrical structure, and the cylindrical structure is tightly filled with silicone material (or integrally formed), so that the syringe can be inserted to extract the blood from the patient's body through the hard tube 3, and after being pulled out, the silicone material can close by itself to prevent blood from flowing out. Among them, the silicone material in the silicone blood sampling port 4 is only set in the cylindrical structure, and does not block the channel between the two ends of the hard tube 3.

[0025] The use process of the utility model is as follows:

[0026] like Figure 4 As shown, the end of the dialysis indwelling needle 10 is connected to the dialysis indwelling needle connection end cap 1. First, insert one end of the dialysis indwelling needle connection tube 2 located inside the dialysis indwelling needle connection end cap 1 into the end of the dialysis indwelling needle 10, and the dialysis indwelling needle connection end cap 1 is sleeved on the outer side of the end of the dialysis indwelling needle 10, and the internal thread of the inner wall of the dialysis indwelling needle connection end cap 1 is connected with the threaded protrusion 11 on the outer side of the end of the dialysis indwelling needle 10 through thread matching, and then rotate the dialysis indwelling needle connection end cap 1, so that the end of the dialysis indwelling needle 10 moves toward the bottom of the dialysis indwelling needle connection end cap 1, until the end of the dialysis indwelling needle 10 is pressed against the bottom of the dialysis indwelling needle connection end cap 1, and the sealing is achieved.

[0027] Then, the circuit connection end cover 9 is put on the connection end of the disposable sterile blood circuit for dialysis, so that the utility model is connected to the disposable sterile blood circuit for dialysis.

[0028] When blood is collected, anticoagulants are injected, and the patient is taken off the machine, there is no need to fold the indwelling needle or clamp the dialysis indwelling needle 10 with a vascular clamp. The clamping device 7 of the utility model can be used to clamp the second extension tube 6 to achieve blocking, thereby preventing the patient from losing blood.

[0029] When it is necessary to draw blood from a patient, the required blood sample can be drawn by simply inserting a syringe into the silicone blood collection port 4 on the hard tube 3, thereby avoiding the risk of contamination.

Claims

1. An extension device for a dialysis indwelling needle, characterized in that: The invention comprises a dialysis indwelling needle connecting tube (2), one end of which is sealedly connected to one end of a hard tube (3), and the other end of the hard tube (3) is sealedly connected to one end of a second extension tube hose (6). A clamping device (7) for closing or opening the passage in the second extension tube hose (6) is provided on the outside of the second extension tube hose (6), and a silicone blood sampling port (4) is provided in the middle of one side of the hard tube (3).

2. The extension device for a dialysis indwelling needle according to claim 1, characterized in that: The outer side of the other end of the dialysis indwelling needle connecting tube (2) is sealedly connected to a dialysis indwelling needle connecting end cap (1) for tightly and sealingly connecting with the end of the dialysis indwelling needle (10).

3. The extension device for a dialysis indwelling needle as claimed in claim 2, characterized in that: The dialysis indwelling needle connection end cap (1) is a sleeve-type structure, and an internal thread is provided on the inner wall of the dialysis indwelling needle connection end cap (1); the internal thread on the inner wall of the dialysis indwelling needle connection end cap (1) is connected to the threaded protrusion (11) on the outer side of the end of the dialysis indwelling needle (10) through threaded fastening and sealing.

4. The extension device for a dialysis indwelling needle according to claim 1, characterized in that: The outer wall of the other end of the second extension tube hose (6) is provided with an external thread for connecting to a disposable sterile blood circuit for dialysis.

5. The extension device for a dialysis indwelling needle as claimed in claim 4, characterized in that: The outer side of the other end of the second extension tube hose (6) is sleeved with a loop connection end cover (9), and the loop connection end cover (9) is a sleeve-type structure.

6. The extension device for a dialysis indwelling needle as claimed in claim 5, characterized in that: The inner wall of the circuit connection end cover (9) is provided with an internal thread; the internal thread of the inner wall of the circuit connection end cover (9) matches and is connected with the external thread of the disposable sterile blood circuit connection end for dialysis.

7. The extension device for a dialysis indwelling needle according to claim 1, characterized in that: The side of the hard tube (3) facing the silicone blood sampling port (4) is a closed structure; the silicone blood sampling port (4) is provided with a silicone material that enables the syringe to be inserted and automatically closed after being pulled out.

8. The extension device for a dialysis indwelling needle according to claim 7, characterized in that: The position of the hard tube (3) where the silicone blood sampling port (4) is arranged is a cylindrical structure, and the cylindrical structure is tightly filled with silicone material.

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