Flexible head end catheter guiding sheath

Abstract

The utility model discloses a flexible head end catheter guiding sheath, which belongs to the technical field of medical instruments and comprises a sheath tube, a bending part positioned at the bottom end of the sheath tube, a liquid inlet tube connected to one side of the top end of the sheath tube and a negative pressure liquid suction tube which is arranged on the outer side of the sheath tube and is symmetrical to the liquid inlet tube in position, and a sheath tube joint is inserted into the top of the sheath tube. By means of the arrangement that the V-shaped tilting rod on the outer side of the clamping sleeve is matched with the clamping mechanism composed of the L-shaped clamping block and the tension spring, the sheath tube can be rapidly clamped to the top of the sheath tube connector, and the clamping mechanism is simple in structure, convenient to operate, rapid to assemble, low in production cost and higher in practicability; and the outer sides of the two ends of the plug are conical inclined surfaces, and a plug-in mechanism consisting of a slot at the end part of the sheath tube joint and an elastic warped sheet at the inner side of the plug bush is matched, so that the sheath tube and the sheath tube joint are positioned in a plug-in manner, and the disassembly and assembly are more convenient.

Description

Technical Field

[0001] The utility model relates to a guide sheath, in particular to a soft head end catheter guide sheath, belonging to the technical field of medical equipment. Background Art

[0002] In the prior art, for example, the utility model with publication number 202321426551.5 discloses a negative pressure suction ureteral guide sheath with a variable bending degree at the head end. In order to solve the problem that the sheath tube joint and the dilator joint of the existing ureteral guide sheath are usually fixed by a clamping piece, but the clamping piece is generally fixedly connected to the dilator joint, resulting in the clamping piece being unable to be disassembled, inconvenient to use, and unable to be reused, a clamping assembly is provided, and a clamping sleeve is sleeved on the upper part of the sheath tube joint. When the wedge-shaped clamping block contacts the clamping ring, the spring contracts and the wedge-shaped clamping block is retracted. When the locking sleeve is fully engaged with the sheath tube connector in the inner cavity of the stent, the wedge-shaped locking block is driven to extend and is locked in the lower part of the clamping ring under the action of the spring, thereby fixing and limiting the locking sleeve and the sheath tube connector. After use, the pull ring is pulled to drive the wedge-shaped locking block into the inner cavity of the stent through the pull rod, and the locking sleeve can be taken out, which can be disassembled separately and reused. In addition, by setting up a connecting component, the sheath tube and the sheath tube connector can be connected by threading the threaded tube and the threaded sleeve. The sealing ring is used to improve the sealing and prevent leakage. The split design facilitates disassembly and use.

[0003] Similar to the above application, there are still some shortcomings:

[0004] 1. The current clamping assembly has many parts, high production cost, and difficult assembly. In addition, during the disassembly process, the finger needs to pinch the pull ring to control the release of the fixed state, and the pull ring is small, which is inconvenient to control;

[0005] 2. The connector is fixed by threaded connection during use, which makes it difficult to install and disassemble quickly and inconvenient to use;

[0006] Therefore, a soft tip catheter guide sheath is designed to optimize the above problems. Utility Model Content

[0007] The main purpose of the utility model is to provide a soft tip-end catheter guide sheath, which can be quickly clamped on the top of the sheath tube connector by setting a clamping mechanism composed of a V-shaped tilting rod on the outside of the clamping sleeve, an L-shaped clamping block and a tension spring, and the clamping mechanism has a simple structure, convenient operation, quick assembly, low production cost and higher practicality. A plug is fixedly arranged on the top of the sheath tube, and the outer sides of both ends of the plug are conical inclined surfaces, and then a plug-in mechanism composed of a slot at the end of the sheath tube connector and an elastic tilting piece on the inside of the plug sleeve is used, so that the sheath tube and the sheath tube connector are positioned by plugging, and disassembly and assembly are more convenient.

[0008] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0009] A soft tip catheter guide sheath comprises a sheath tube, a curved portion at the bottom end of the sheath tube, a liquid inlet tube connected to one side of the top end of the sheath tube, and a negative pressure liquid suction tube symmetrically located with the liquid inlet tube on the outside of the sheath tube; a sheath tube joint is plugged and installed at the top of the sheath tube, a plug-in mechanism is provided between the sheath tube and the sheath tube joint, a clamping sleeve is provided at the top of the sheath tube joint, V-shaped tilting rods are symmetrically provided on both sides of the clamping sleeve, the tip of the V-shaped tilting rod is hingedly installed on the clamping sleeve, an L-shaped clamping block is fixedly provided at the bottom end of the V-shaped tilting rod, and the L-shaped clamping block is clamped at the edge protrusion of the top end of the outer side of the sheath tube joint, and a tension spring is installed between the bottom of the V-shaped tilting rod and the outer side of the clamping sleeve.

[0010] Preferably, the top end of the outer side of the V-shaped tilt bar is provided with anti-slip grooves, and the anti-slip grooves are parallel to the width direction of the V-shaped tilt bar.

[0011] Preferably, the top of one end of the L-shaped clamping block where it is attached to the sheath tube connector is an inclined surface, and the V-shaped tilting rod and the L-shaped clamping block are integrally injection molded.

[0012] Preferably: the plug-in mechanism includes a plug, a slot, an elastic flap and a conical slope, the plug is fixed at the top of the sheath tube, the outer sides of both ends of the slot are provided with conical slopes, the bottom end of the sheath tube joint is provided with a slot, and the inner wall of the open end of the slot is evenly provided with elastic flaps along the circumferential direction.

[0013] Preferably, the elastic flaps are all inclined toward the inside of the sheath tube connector, and the sides of adjacent elastic flaps fit together.

[0014] Preferably: a rubber cushion layer is provided at the conical inclined surface where the plug contacts the inner side of the slot, and the rubber cushion layer fits the inner side of the slot.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a soft tip catheter guide sheath, which can be quickly clamped on the top of the sheath tube connector by setting a clamping mechanism composed of a V-shaped tilting rod on the outer side of the clamping sleeve, an L-shaped clamping block and a tension spring, and the clamping mechanism has a simple structure, convenient operation, quick assembly, low production cost and higher practicality.

[0017] By fixing a plug at the top of the sheath tube, and the outer sides of both ends of the plug are tapered bevels, and then cooperating with the slot at the end of the sheath tube connector and the elastic flap on the inner side of the plug sleeve to form a plug-in mechanism, the sheath tube and the sheath tube connector are positioned by plugging, which makes disassembly and assembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the main expanded view of the utility model;

[0019] Figure 2 It is the front view of the utility model;

[0020] Figure 3 This is a structural diagram of a joint of the utility model;

[0021] Figure 4 It is a cross-sectional view of the joint of the present utility model.

[0022] In the figure: 1. sheath; 2. bending part; 3. liquid inlet tube; 4. negative pressure liquid suction tube; 5. sheath joint; 6. clamping sleeve; 7. V-shaped lift rod; 8. L-shaped clamping block; 9. tension spring; 10. plug; 11. slot; 12. elastic lift piece; 13. conical slope. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0024] like Figure 1-Figure 4 As shown, the present embodiment provides a soft head-end catheter guide sheath, comprising a sheath tube 1, a curved portion 2 at the bottom end of the sheath tube 1, a liquid inlet tube 3 connected to one side of the top end of the sheath tube 1, and a negative pressure liquid suction tube 4 symmetrically positioned with the liquid inlet tube 3 on the outside of the sheath tube 1, a sheath tube connector 5 is installed at the top of the sheath tube 1, a plug-in mechanism is provided between the sheath tube 1 and the sheath tube connector 5, a locking sleeve 6 is provided at the top of the sheath tube connector 5, V-shaped cocking rods 7 are symmetrically provided on both sides of the locking sleeve 6, the tip of the V-shaped cocking rod 7 is hingedly installed on the locking sleeve 6, an L-shaped clamping block 8 is fixedly provided at the bottom end of the V-shaped cocking rod 7, and the L-shaped clamping block 8 is clamped at the edge protrusion of the top end of the outer side of the sheath tube connector 5, and a tension spring 9 is installed between the bottom of the V-shaped cocking rod 7 and the outer side of the locking sleeve 6.

[0025] The overall working principle is: when connecting the locking sleeve 6 with the sheath tube connector 5, the thumb and index finger respectively pinch the top of the two groups of V-shaped tilt rods 7, lift the L-shaped blocking block 8 at the bottom of the V-shaped tilt rod 7, stretch the tension spring 9, and then insert the locking sleeve 6 into the top of the sheath tube connector 5, and then release the pressure applied to the V-shaped tilt rod 7. At this time, the tension spring 9 will control the V-shaped tilt rod 7 to reset, and the L-shaped blocking block 8 at the bottom of the V-shaped tilt rod 7 will be stuck in the edge protrusion of the top outer side of the sheath tube connector 5, completing the connection between the locking sleeve 6 and the sheath tube connector 5. In addition, when the sheath tube 1 is connected to the sheath tube connector 5, the plug-in mechanism is used for plug-in positioning.

[0026] In this embodiment, the top end of the outer side of the V-shaped tilt bar 7 is provided with anti-skid grooves, and the anti-skid grooves are parallel to the width direction of the V-shaped tilt bar 7 .

[0027] Partial working principle: The anti-skid pattern on the V-shaped tilting rod 7 can effectively prevent fingers from slipping, thereby improving the stability of holding the hand.

[0028] In this embodiment, the top of one end of the L-shaped clamping block 8 where it is attached to the sheath tube connector 5 is an inclined surface, and the V-shaped tilting rod 7 and the L-shaped clamping block 8 are integrally injection molded.

[0029] Partial working principle: When the L-shaped block 8 is clamped onto the sheath tube connector 5, the inclined surface on the L-shaped block 8 first contacts the edge protrusion at the outer top end of the sheath tube connector 5, and then guides the L-shaped block 8 to be clamped into the bottom of the protrusion, making the clamping more convenient.

[0030] In this embodiment, the plug-in mechanism includes a plug 10, a slot 11, an elastic lift piece 12 and a conical slope 13. The plug 10 is fixed to the top of the sheath 1. Conical slopes 13 are provided on the outer sides of both ends of the slot 11. The slot 11 is provided at the bottom end of the sheath connector 5. Elastic lift pieces 12 are evenly provided on the inner wall of the open end of the slot 11 along the circumferential direction.

[0031] Local working principle: when connecting the sheath 1 with the sheath connector 5, directly align the plug 10 on the sheath 1 with the slot 11 and insert it directly into the inside. During the insertion of the plug 10, the elastic paddle 12 will be squeezed, and the conical slope 13 at one end of the plug 10 will automatically reset after passing the elastic paddle 12. The elastic paddle 12 presses against the conical slope 13 at the other end of the plug 10 to stabilize the position of the plug 10. When separating the sheath 1 from the sheath connector 5, directly pull the sheath 1 outward, and the plug 10 will control the expansion of the elastic paddle 12 and pull it out from the inside of the slot 11.

[0032] In this embodiment, the elastic flaps 12 are all inclined toward the inside of the sheath tube connector 5, and the sides of adjacent elastic flaps 12 are in contact with each other.

[0033] Partial working principle: Through the use of multiple sets of elastic flaps 12, the plug 10 can be more stable after being inserted into the slot 11.

[0034] In this embodiment, a rubber cushion layer is provided at the conical inclined surface 13 where the plug 10 contacts the inner side of the slot 11 , and the rubber cushion layer fits the inner side of the slot 11 .

[0035] Partial working principle: The rubber pad layer on the outer side of the conical slope 13 can ensure the sealing effect after plugging.

[0036] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A soft tip catheter guide sheath, comprising a sheath tube (1), a curved portion (2) at the bottom end of the sheath tube (1), a liquid inlet tube (3) connected to one side of the top end of the sheath tube (1), and a negative pressure liquid suction tube (4) on the outside of the sheath tube (1) and symmetrically located with the liquid inlet tube (3), characterized in that: A sheath tube connector (5) is installed at the top of the sheath tube (1) by plugging, a plugging mechanism is provided between the sheath tube (1) and the sheath tube connector (5), a locking sleeve (6) is provided at the top of the sheath tube connector (5), V-shaped tilting rods (7) are symmetrically provided on both sides of the locking sleeve (6), the tip of the V-shaped tilting rod (7) is hingedly installed on the locking sleeve (6), an L-shaped clamping block (8) is fixedly provided at the bottom end of the V-shaped tilting rod (7), and the L-shaped clamping block (8) is clamped at the edge protrusion of the top outer side of the sheath tube connector (5), and a tension spring (9) is installed between the bottom of the V-shaped tilting rod (7) and the outer side of the locking sleeve (6).

2. A soft tip catheter guide sheath according to claim 1, characterized in that: The top end of the outer side of the V-shaped tilting rod (7) is provided with anti-skid grooves, and the anti-skid grooves are parallel to the width direction of the V-shaped tilting rod (7).

3. A soft tip catheter guide sheath according to claim 1 or 2, characterized in that: The top of one end of the L-shaped clamping block (8) and the sheath tube connector (5) is an inclined surface, and the V-shaped tilting rod (7) and the L-shaped clamping block (8) are integrally injection molded.

4. A soft tip catheter guide sheath according to claim 3, characterized in that: The plug-in mechanism comprises a plug (10), a slot (11), an elastic lift piece (12) and a conical inclined surface (13); the plug (10) is fixed at the top end of the sheath tube (1); the outer sides of both ends of the slot (11) are provided with conical inclined surfaces (13); the bottom end of the sheath tube connector (5) is provided with a slot (11); and the inner wall of the open end of the slot (11) is evenly provided with elastic lift pieces (12) along the circumferential direction.

5. A soft tip catheter guide sheath according to claim 4, characterized in that: The elastic flaps (12) are all inclined toward the inside of the sheath tube connector (5), and the sides of adjacent elastic flaps (12) are in contact with each other.

6. A soft tip catheter guide sheath according to claim 5, characterized in that: A rubber cushion layer is provided at the conical inclined surface (13) where the plug (10) contacts the inner side of the slot (11), and the rubber cushion layer fits the inner side of the slot (11).

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