Stay wire control part and medical catheter controlled by stay wire and provided with curled inner end

Abstract

A medical catheter controlled by a stay wire and provided with a curled inner end comprises a stay wire control component, a catheter body and a catheter connector, the control component comprises a handle and a U-shaped lock catch which are connected into a whole, two threading holes are formed in the end of the U-shaped lock catch side by side and penetrate through the U-shaped lock catch in the thickness direction of the U-shaped lock catch, and the catheter connector is connected with the handle. The two ends of the stay wire extending out of the joint of the guide pipe respectively penetrate through the two threading holes, the ends of the two penetrated stay wires are integrally knotted, and the knotted wire knot is located in the groove; according to the guide pipe, a double-threading-hole structure is designed on the U-shaped lock catch, the pull wire and the U-shaped lock catch are connected in the mode that the two ends of the pull wire penetrate through the two threading holes respectively and are knotted, a connecting structure that a single wire is wound and connected in a sleeved mode through the two holes is formed, high connecting firmness is achieved, the phenomenon that the pull wire slides out of the threading through holes due to stress is avoided, and the service life of the guide pipe is prolonged. The situation that the pull wire and the lock catch are connected again or a new catheter is replaced and placed again in the catheter placement process is avoided, and the catheter placement efficiency and the treatment experience of a patient are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical catheter, especially to a pull wire control component and a medical catheter with the pull wire control of inner end curl. BACKGROUND

[0002] Pigtail drainage tube, also known as pigtail catheter, is a medical product mainly used for the drainage of internal fluid. The catheter is named after its natural curling pigtail shape at the distal end, and has multiple drainage holes to effectively drain liquid. Pigtail drainage tube is often used for the treatment of pneumothorax, renal pelvis fluid, ureter obstruction, etc.

[0003] The current pigtail drainage tube mainly adopts the catheter structure disclosed in the application number CN2023216757618. The pull wire of the pigtail drainage tube is connected to the distal end of the tube body. By pulling the pull wire, the distal end of the drainage tube is tightened to form a pigtail bending part. A lock catch is connected to the outer end of the pull wire. The outer wall of the catheter connector is provided with a lock catch slot and a pull wire slot. The lock catch is tightly buckled in the lock catch slot and the excess pull wire is wound in the slot to lock the pull wire and maintain the bending and tightening force of the pull wire.

[0004] The current pigtail drainage tube is connected to the lock catch by setting a through hole on the side of the lock catch, and the pull wire is positioned by knotting (see the above patent Figure 1 ). The knotting positioning has limited strength. During clinical operation, the pull wire often slips out of the through hole under stress, which requires reconnection of the pull wire and the lock catch or replacement of the new catheter for reinsertion, seriously affecting the catheter insertion efficiency and the patient's treatment experience, and needs to be improved. UTILITY MODEL CONTENT

[0005] To solve the above problems, the utility model provides a pull wire control component and a medical catheter with the pull wire control of inner end curl.

[0006] The technical scheme of the utility model is: a pull wire control component, the control component includes a hand pinch handle and a U-shaped lock catch connected as a whole. The surface of the hand pinch handle is provided with an arc-shaped recess. The inner surface of the U-shaped lock catch is a toothed structure, and the inner end is provided with a lead-in inclined surface connected with the toothed structure. The end of the U-shaped lock catch is provided with two circular wire holes side by side, and the wire holes are penetrated along the thickness direction of the U-shaped lock catch.

[0007] Preferably, the surface of one side of the U-shaped lock catch is provided with a groove covering the two wire holes. The two wire holes are respectively located at the end of the two grooves, and the grooves are set as oblong.

[0008] Preferably, the inner edge portion of the other side surface of the U-shaped lock is provided with a wire running notch corresponding to the position of the wire hole, the direction of the wire running notch is consistent with the direction of the wire hole, and the wire running notch communicates the port of the wire hole with the clamping surface on the inner side of the U-shaped lock.

[0009] Preferably, the bottom of the wire running notch is an arc-shaped bottom, and the edge portion of the wire running notch is provided with a round corner.

[0010] Preferably, the wire hole is arranged only at the end of one side of the U-shaped lock.

[0011] A medical catheter with an inner end crimped by a pull wire control part, the catheter structure is connected to the outer end of the catheter structure, and the pull wire extending from the pull wire control part is arranged to pass through the two wire holes respectively, the two ends of the pull wire have the same length, and the two ends of the pull wire are knotted after passing through the two wire holes, so as to form a closed pull wire structure sleeved between the two wire holes, and the knot is located in the groove.

[0012] Preferably, the wire running notch and the side surface of the annular clamping groove form a wire running channel after the U-shaped lock is clamped into the annular clamping groove, the wire running channel is opposite to the annular wire groove on the joint, the annular wire groove is arranged on the groove bottom of the annular clamping groove, and the annular wire groove is located on one side of the groove bottom.

[0013] The beneficial technical effects of the utility model are:

[0014] (1) The catheter is designed with double wire hole structures on the U-shaped lock, the pull wire is connected with the U-shaped lock by passing through the two wire holes and knotting the two ends of the pull wire, a single wire winding connection structure is formed from the double holes, the connection is firm, the pull wire cannot slide out of the wire hole under stress, the pull wire does not need to be connected with the lock again or replaced during the catheter placement, and the catheter placement efficiency and the treatment experience of the patient are improved.

[0015] (2) The wire running notch arranged on the U-shaped lock of the catheter forms a wire running channel between the wire running notch and the side surface of the annular clamping groove after the U-shaped lock is clamped into the annular clamping groove, the wire running channel is opposite to the annular wire groove on the joint, and therefore the pull wire in the annular wire groove can enter the wire hole from the wire running channel, the pull wire is prevented from being clamped between the contact surface of the U-shaped lock and the annular clamping groove and then entering the wire hole, and the pull wire is prevented from being abraded and then broken during pulling, so that the safety of the catheter placement is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of a three-dimensional structure of the pull wire control part;

[0017] Figure 2is a schematic diagram of the front structure of the pull wire control component;

[0018] Figure 3 is Figure 2 a schematic diagram of the A-A sectional structure of the pull wire control component;

[0019] Figure 4 is a schematic diagram of the three-dimensional structure of the pull wire control medical catheter with the inner end crimped;

[0020] Figure 5 is Figure 4 a schematic diagram of the B direction of the pull wire control medical catheter with the inner end crimped;

[0021] Figure 6 is a schematic diagram of the front structure of the pull wire control medical catheter with the inner end crimped;

[0022] Figure 7 is Figure 6 a partial enlarged view of the pull wire control medical catheter with the inner end crimped.

[0023] In the figure, 1. hand pinch handle, 2. U-shaped lock, 21. threading hole, 22. groove, 23. wire running gap, 3. catheter body, 4. catheter connector, 141. annular clamping groove, 142. annular wire winding groove, 5. pull wire, 51. knot. DETAILED DESCRIPTION

[0024] Example one, see attached Figures 2-6 A pull wire control medical catheter with the inner end crimped, comprising a pull wire control component, a catheter body 3 and a catheter connector 4, the pull wire control component comprises a hand pinch handle 1 and a U-shaped lock 2 connected as one, the end of the U-shaped lock is provided with two circular threading holes 21 side by side, the threading holes pass through the U-shaped lock 2 along the thickness direction, forming a double threading hole 21 structure on the U-shaped lock 2, the pull wire 5 extending out of the catheter connector 4 passes through the two threading holes 21 respectively, and the ends of the two pull wires 5 after passing through are knotted integrally.

[0025] The surface of one side of the U-shaped lock 2 is provided with a groove 22 covering the two threading holes 21, and the knot 51 after knotting is located in the groove 22. The knot 51 of the pull wire 5 located in the groove 22 can avoid being scratched at the knot 51 during the use of the catheter after being placed in the catheter, improve the firmness of the pull wire 5 connected between the two threading holes 21, and ensure the stability of the pulling of the distal end of the catheter body 3.

[0026] This embodiment connects the pull wire 5 and the U-shaped lock 2 by the way of passing the two ends of the pull wire 5 through the two threading holes 21 respectively and knotting, forming a connection structure of single wire winding from double holes, which has high connection firmness. When the pull wire 5 is pulled to bend the distal end of the catheter body 3, the pull wire 5 will not slip out of the threading hole under stress, avoiding the situation of reconnecting the pull wire 5 with the lock or replacing a new catheter during the process of placing the catheter.

[0027] Embodiment two, see attached Figures 1-3 , 6-7, this embodiment is basically the same as embodiment one, the same will not be repeated, the difference is: the inner edge of the other side surface of the U-shaped lock 2 is provided with a wire running notch 23 corresponding to the position of the wire hole 21, the wire running notch communicates the port of the wire hole 21 with the clamping surface inside the U-shaped lock 2, the bottom of the wire running notch 23 is arc-shaped, which plays a guiding role, so that the pull wire 5 accurately enters the wire hole 21 from the middle of the arc-shaped bottom, which can reduce the friction force on the pull wire 5.

[0028] After the catheter is placed in the patient's body and the pull wire 5 is pulled to bend the catheter body 3 at the distal end, the remaining part of the pull wire 5 is adjusted to correspond to the two wire running notches 23 respectively, the pull wire 5 is kept in tension and wound in the annular wire winding groove 142 on the catheter joint 4, then the U-shaped lock 2 is clamped into the annular clamping groove 141 on the catheter joint 4 by pinching the hand grip 1, in the clamping process, the pull wire 5 enters the wire running notch 23, after clamping, the side surfaces of the wire running notch 23 and the annular clamping groove 141 fit to form a wire running channel, at this time the wire running channel is opposite to the annular wire winding groove 142, forming the effect that the pull wire 5 in the annular wire winding groove 142 enters the wire hole 21 from the wire running channel, avoiding the pull wire 5 being clamped after the contact surface of the U-shaped lock 2 and the annular clamping groove 141 to enter the wire hole 21, and further avoiding the pull wire 5 being worn to cause the phenomenon of breaking when pulling.

Claims

1. A pull cord control member comprising a hand grip and a U-shaped catch connected as one, characterised in that: The end of the U-shaped lock buckle is provided with two wire passing holes side by side, and the wire passing holes are penetrated along the thickness direction of the U-shaped lock buckle.

2. A guy control member according to claim 1, characterised in that: The surface of one side of the U-shaped lock buckle is provided with a groove covering the two wire passing holes.

3. A guy control member according to claim 2, wherein: The inner edge part of the surface of the other side of the U-shaped lock buckle is provided with a wire running notch corresponding to the position of the wire passing hole, and the wire running notch communicates the port of the wire passing hole with the clamping surface on the inner side of the U-shaped lock buckle.

4. A guy control member according to claim 3, wherein: The bottom of the wire running notch is arc-shaped.

5. A guy control member according to claim 1, wherein: Only the end of one side of the U-shaped lock buckle is provided with a wire passing hole.

6. A pull-wire controlled, internally crimped medical catheter comprising the pull-wire control member of any one of claims 1-5, a catheter body and a catheter hub, characterized in that: The two ends of the pull wire extending from the catheter joint respectively pass through the two wire passing holes, and the two pull wire ends after passing through are integrally knotted, and the knot after knotting is located in the groove.

7. A pull wire controlled inner tip crimped medical catheter according to claim 6, characterized by: The wire running notch and the side surface of the annular clamping groove on the catheter joint form a wire running channel after the U-shaped lock buckle is clamped into the annular clamping groove, the wire running channel is opposite to the annular wire winding groove on the catheter joint, and the pull wire in the annular wire winding groove enters the wire passing hole from the wire running channel.

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