CN219440349U - Detachable guiding sheath tube and guiding device - Google Patents

Abstract

The utility model provides a detachable guiding sheath tube and a guiding device, wherein the detachable guiding sheath tube comprises a middle tube section and a bendable tube section detachably connected with the middle tube section, a first connecting part is arranged on the bendable tube section, a second connecting part is arranged on the middle tube section, and the middle tube section is detachably connected with the first connecting part through the second connecting part. The detachable guide sheath tube can be detachably replaced with the flexible tube sections with different structures, so that the most suitable flexible tube section can be selected according to the physiological structure of a patient and is bent into a required shape, and the adaptability of the detachable guide sheath tube is improved.

Description

Detachable guiding sheath tube and guiding device

Technical Field

The utility model belongs to the technical field of medical treatment, and particularly relates to a detachable guiding sheath tube and a guiding device.

Background

A ureteroscope lithotripsy is to insert a thin lens with a diameter of about 3mm into a ureter through a urethra and a bladder to break up and take out ureteral calculus or kidney calculus. The guiding sheath is a consumable material commonly used in ureteroscope operation and is used for establishing a channel which passes through the urethra and the ureter from outside the body and directly enters the renal pelvis. The ureteroscope directly enters the operation area through the guidance of the guiding sheath tube, can conveniently carry out related operations, and is not influenced by the bending state and thickness degree of the ureter and the urethra. At present, an introducer sheath used in ureteroscope operation is generally manufactured in an integrated manner and has the same length and size, and the introducer sheath has the following disadvantages: different patients have different physiological structures, but in the prior art, the same size of the guiding sheath can be used only in surgery for different physiological structures of different patients, so the guiding sheath in the prior art cannot be suitable for all users.

Moreover, the guiding sheath tube main body in the prior art is a relatively tough pipeline, and the anti-compression and anti-twisting performance is usually emphasized, so that after the guiding wire is placed into a human body along the guiding wire, the bending part of the ureter can be relatively straightened through the toughness of the guiding sheath tube, so that the operation such as the in-out and rotation of an endoscope is facilitated, and due to the toughness of the guiding sheath tube, the guiding sheath tube can only be placed at the upper section of the ureter or just enter the position of the renal pelvis, a channel parallel to the longitudinal axis of the body is formed, and the guiding sheath tube cannot be bent to enter deeper parts of the renal pelvis and renal calyx, so that the stone fragments are difficult to access to the stone crushed in operation, and cannot be flushed out of the guiding sheath tube through the water flow poured in operation, so that the clearance efficiency of the stone fragments in the ureteral soft-scope operation is low.

Disclosure of Invention

The utility model provides a detachable guide sheath tube and a guide device, which aim at the technical problems that the guide sheath tube in the prior art cannot be suitable for all users and cannot be bent.

In view of the above technical problems, an embodiment of the present utility model provides a detachable guiding sheath tube, which includes a middle tube section and a bendable tube section detachably connected with the middle tube section, wherein a first connection portion is provided on the bendable tube section, a second connection portion is provided on the middle tube section, and the middle tube section is detachably connected with the first connection portion through the second connection portion.

Specifically, the middle pipe section comprises a first protection layer, a supporting structure layer and a second protection layer, wherein the first protection layer is coated on the outer side wall of the supporting structure layer, and the second protection layer is coated on the inner side wall of the supporting structure layer.

Specifically, the support structure layer is a spring layer.

Specifically, the first protective layer is a PEBAX material layer.

Specifically, the second protective layer is a PTFE material layer.

Specifically, the first connection portion is an internal thread or an external thread provided on the bendable pipe section, and the second connection portion is an external thread or an internal thread provided on the intermediate pipe section and in threaded connection with the first connection portion.

Specifically, the first connecting portion is a clamping groove or a clamping hook arranged on the bendable pipe section, and the second connecting portion is a clamping hook or a clamping groove arranged on the middle pipe section and in clamping connection with the first connecting portion.

In particular, the bendable pipe section comprises an elastic hose.

Specifically, the bendable pipe section comprises mortise and tenon joint pipes, each mortise and tenon joint pipe comprises at least two metal mortise and tenon joint pieces and an elastic layer coated on the outer surfaces of all the metal mortise and tenon joint pieces, and each metal mortise and tenon joint piece is inserted in sequence along the axial direction of the middle pipe section; the mortise and tenon joint pipe is used for bending relative to the axial direction of the middle pipe section through relative sliding between the metal mortise and tenon joint pieces when the mortise and tenon joint pipe receives lateral force.

The embodiment of the utility model also provides an guiding device, which comprises a dilator and the detachable guiding sheath; the detachable guiding sheath tube further comprises a sheath tube joint, one end of the middle tube section, which is far away from the second connecting part, is installed on the sheath tube joint, and the expander penetrates through the bendable tube section and the middle tube section to be connected with the sheath tube joint.

According to the detachable guide sheath pipe, the detachable guide sheath pipe is divided into the bendable pipe section and the middle pipe section, and the connection mode of the bendable pipe section and the middle pipe section is set to be detachable connection, so that the bendable pipe section can be detached and replaced by the bendable pipe sections with different structures when the detachable guide sheath pipe is used, and therefore the detachable guide sheath pipe can select the most suitable bendable pipe section structure according to the physiological structure of a patient, and the adaptability of the detachable guide sheath pipe is improved. The detachable guide sheath tube is characterized in that the most suitable bendable tube section structure is selected according to the physiological structure of a patient and is bent into a required shape, so that the detachable guide sheath tube can be close to stone fragments in kidneys through the bendable tube section, and then the stone fragments are flushed out of the detachable guide sheath tube through water flow poured in an operation, and the discharge efficiency of the stone fragments is improved.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic view of a detachable guiding sheath according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of a mortise and tenon joint pipe according to an embodiment of the present utility model.

Fig. 3 is a schematic structural view of a mortise and tenon joint pipe according to another embodiment of the present utility model.

Fig. 4 is a schematic structural view of a metal mortise member of the mortise plug pipe in fig. 2.

Fig. 5 is a schematic view of a metal mortise member of the mortise plug pipe in fig. 3.

Fig. 6 is a schematic structural diagram of a guiding device according to an embodiment of the utility model.

Reference numerals in the specification are as follows:

1. bendable pipe section 2, intermediate pipe section 3, sheath pipe joint, 4, expander, 12, first connecting section, 21, second connecting section, 22, first protective layer, 23, support structure layer, 24, second protective layer, 11, metal mortise and tenon, 13, elastic layer, 1101, first body, 1102, first plug section 1103, second plug section 1104, first plug chute 1105, second plug chute 11021, first plug, 11022, first connecting section, 11041, first limiting opening 11031, second plug, 11032, second connecting section 11051, second limiting opening 11023, first arcuate surface, 11033, second arcuate surface, 11052, second arcuate surface, 11042, first arcuate surface, 1106, second body, 1107, first rotary groove 1108, first stopper, 1109, first rotary block, 11071, first opening, second stopper, 1111, second rotary block 1110, second rotary groove 11111, second rotary block 11121, 1113, third opening 1113, 11117, second opening 11117, 1115, second opening, 11117, 1119, third rotary block.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It is to be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

As shown in fig. 1, an embodiment of the present utility model provides a detachable guiding sheath, where the detachable guiding sheath includes a middle pipe section 2 and a bendable pipe section 1 detachably connected to the middle pipe section 2, a first connection portion 12 is provided on the bendable pipe section 1, a second connection portion 21 is provided on the middle pipe section 2, and the middle pipe section 2 is detachably connected to the first connection portion 12 through the second connection portion 21. In an embodiment, the detachable guiding sheath comprises at least two of the bendable pipe sections 1, at least two of the bendable pipe sections 1 being replaceably connected to the intermediate pipe section 2.

In the embodiment of the utility model, the detachable guiding sheath pipe is divided into the bendable pipe section 1 and the middle pipe section 2, and the connection mode of the bendable pipe section 1 and the middle pipe section 2 is set to be detachable connection, so that the bendable pipe section 1 can be detached and replaced by the bendable pipe section 1 with different structures when the detachable guiding sheath pipe is used, the detachable guiding sheath pipe can select the most suitable bendable pipe section 1 structure according to the physiological structure of a patient, and the length and the like of the different bendable pipe sections 1 with the same structure can also be set according to actual conditions, thereby improving the adaptability of the detachable guiding sheath pipe. The detachable guide sheath tube is characterized in that the most suitable bendable tube section 1 is selected according to the physiological structure of a patient and is bent into a required shape, so that the detachable guide sheath tube can be close to stone fragments in kidneys through the bendable tube section 1, and then the stone fragments are flushed out of the detachable guide sheath tube through water flow poured in operations, the discharge efficiency of the stone fragments is improved, the situation that stone powder affects the visual field or is accumulated in kidneys to affect the operation efficiency is avoided, uncertainty of natural stone discharge can be avoided, and the stone clearance is improved.

In one embodiment, as shown in fig. 1, the middle pipe section 2 includes a first protection layer 22, a support structure layer 23, and a second protection layer 24, wherein the first protection layer 22 is coated on an outer sidewall of the support structure layer 23, and the second protection layer 24 is coated on an inner sidewall of the support structure layer. Further, the support structure layer 23 is a spring layer, the first protective layer 22 is a PEBAX (block polyether amide resin) material layer, and the second protective layer 24 is a PTFE (polytetrafluoroethylene) material layer. It will be appreciated that the first protective layer 22 and the second protective layer 24 cover the outer surface and the inner surface of the support structure layer 23, respectively, so as to protect the support structure layer 23. In an embodiment, the surfaces of the first protective layer 22 and the second protective layer 24 that contact the outside further include a lubrication coating for smoother insertion or insertion of the intermediate pipe section 2. In the above embodiment, the supporting structure layer 23 of the intermediate tube section 2 is a spring layer, so that the intermediate tube section 2 retains the toughness of the guiding sheath tube in the prior art, but on the basis of this, the bendable tube section 1 is added, so that the bendable guiding sheath tube can be bent into a required shape, and the bendable guiding sheath tube can be enabled to pass through the bendable tube section 1 to approach the stone fragments in the kidney, thereby improving the discharge efficiency of the stone fragments.

In one embodiment, as shown in fig. 1, the first connection portion 12 is an internal thread or an external thread provided on the bendable pipe section 1, and the second connection portion 21 is an external thread or an internal thread provided on the intermediate pipe section 2 and screwed with the first connection portion 12. In an embodiment, the first connecting portion 12 is a clamping groove or a clamping hook disposed on the bendable pipe section 1, and the second connecting portion 21 is a clamping hook or a clamping groove disposed on the middle pipe section 2 and in snap connection with the first connecting portion 12. It should be understood that the connection manner between the first connection portion 12 and the second connection portion 21 includes, but is not limited to, one or more of a detachable connection manner such as a magnetic connection, a threaded connection, a clamping slot, or a clamping hook, and the detachable connection manner may be any manner as long as the first connection portion 12 and the second connection portion 21 can be firmly connected and can be detached.

In an embodiment, as shown in fig. 1 to 3, the bendable pipe section 1 includes mortise and tenon joint pipes, each mortise and tenon joint pipe includes at least two metal mortise and tenon joint members 11 and an elastic layer 13 coated on the outer surfaces of all the metal mortise and tenon joint members 11, and each metal mortise and tenon joint member 11 is inserted in sequence along the axial direction of the intermediate pipe section 2; the mortise and tenon joint pipe is used for bending relative to the axial direction of the middle pipe section 2 through relative sliding between the metal mortise and tenon joint pieces 11 when the mortise and tenon joint pipe receives lateral force. In an embodiment, the bendable pipe section 1 comprises an elastic hose.

In the embodiment of the utility model, the effect of bending the bendable pipe section 1 is realized by arranging at least two metal mortise and tenon joint pieces 11 and inserting the metal mortise and tenon joint pieces 11 in sequence along the axial direction of the middle pipe section 2, so that the sheath mouth of the detachable guiding sheath pipe can more conveniently approach to the direction of stones in the kidney.

In an embodiment, as shown in fig. 2 and 4, the metal mortise and tenon joint 11 includes a first body 1101, at least two first plugging portions 1102, and at least two second plugging portions 1103, where the first plugging portions 1102 and the second plugging portions 1103 are symmetrically connected to opposite sides of the first body 1101; a first insertion chute 1104 for inserting and relatively sliding the second insertion portion 1103 of the adjacent metal mortise and tenon joint 11 is formed between the two first insertion portions 1102; a second insertion chute 1105 is formed between the two second insertion portions 1103 for inserting and sliding the first insertion portions 1102 of the adjacent metal mortise and tenon members 11. It will be appreciated that the first body 1101 may be a ring-shaped structure, a sheet-like structure, or any other shape, as long as the bendable pipe section 1 is bendable when the metal mortise and tenon 11 is stretched and/or contracted. Preferably, the first body 1101 is in an annular structure, the first plugging portion 1102 and the first plugging sliding slot 1104 are distributed on one side of the first body 1101, and the second plugging portion 1103 and the second plugging sliding slot 1105 are distributed on the other side of the first body 1101. The first plugging portions 1102 are plugged with the second plugging sliding grooves 1105 and can slide in the second plugging sliding grooves 1105, and the second plugging portions 1103 are plugged with the first plugging sliding grooves 1104 and can slide in the first plugging sliding grooves 1104, so that a bendable tubular structure is formed between the metal mortise and tenon joint pieces 11 through the sliding connection relationship.

In an embodiment, as shown in fig. 2 and 4, the first plug 1102 includes a first plug 11021 and a first connection section 11022 connected between the first body 1101 and the first plug 11021; the second plug portion 1103 includes a second plug 11031 and a second connection segment 11032 connected between the second body 1106 and the second plug 11031; a first limiting opening 11041 through which the second connecting section 11032 passes is arranged on the first inserting sliding groove 1104; the second plug-in sliding chute 1105 is provided with a second limit opening 11051 for the first connecting section 11022 to pass through; the maximum width of the first plug 11021 is larger than the width of the second limit opening 11051 in the direction perpendicular to the axial direction of the bendable pipe section 1 which is not bent; when the bendable pipe section 1 is bent, the first plug 11021 slides relatively along the second plug sliding chute 1105; the maximum width of the second plug 11031 is greater than the width of the first limiting opening 11041; when the bendable pipe section 1 is bent, the second plug 11031 slides along the first plug-in chute 1104. As can be appreciated, in a direction perpendicular to the axial direction of the bendable pipe section 1 that is not bent, the maximum width of the first plug 11021 is larger than the width of the second limiting opening 11051, and the second limiting opening 11051 performs a limiting function to prevent the first plug 1102 from being separated from the second plug chute 1105; the maximum width of the second plug 11031 is greater than the width of the first limiting opening 11041, and the first limiting opening 11041 performs a limiting function to prevent the second plug 1103 from being separated from the first plug chute 1104. It will be appreciated that the maximum width of the first plug 11021 is less than or equal to the width of the second plug runner 1105 in a direction perpendicular to the axial direction of the bendable pipe section 1 that is not bent, such that the first plug 11021 can slide within the second plug runner 1105; the maximum width of the second plug 11031 is less than or equal to the width of the first plug chute 1104, such that the second plug 11031 can slide within the first plug chute 1104. It will be appreciated that the maximum width of the first connecting section 11022 is smaller than the width of the second limiting opening 11051 in a direction perpendicular to the axial direction of the bendable pipe section 1 that is not bent, so that the first connecting section 11022 slides within the second limiting opening 11051 when the first plug 11021 slides relatively along the second plug chute 1105; the maximum width of the second connecting section 11032 is smaller than the width of the first limiting opening 11041, so that the second connecting section 11032 slides in the first limiting opening 11041 when the second plug 11031 slides along the first plug sliding groove 1104 relatively.

In an embodiment, as shown in fig. 2 and fig. 4, a first arc surface 11023 is disposed at an end of the first plug 11021 away from the first body 1101, a second arc surface 11033 is disposed at an end of the second plug 11031 away from the first body 1101, a second arc groove 11052 matching the first arc surface 11023 is disposed at an end of the second plug sliding groove 1105 near the first body 1101, a first arc groove 11042 matching the second arc surface 11033 is disposed at an end of the first plug sliding groove 1104 near the first body 1101, the second limiting opening 11051 is formed between the two second plugs 11031, the first plug 11021 can rotate in the second plug sliding groove 1105, the first limiting opening 11041 is formed between the two first plugs 11021, and the second plug 11031 can rotate in the first plug sliding groove 1104.

In the embodiment of the utility model, by arranging at least two annular mutually-inserted metal mortise and tenon-and-tenon-mortise parts 11, and the metal mortise and tenon-and-mortise parts 11 are of semicircular concave-convex combined mortise and tenon-and-mortise structures, the universal bending effect of the bendable pipe section 1 is realized, and the bendable pipe section 1 can be stretched and contracted within a certain limit, so that the sheath mouth of the guiding sheath tube can be more conveniently close to the direction of stones in the kidney.

In one embodiment, as shown in fig. 3 and 5, the metal mortise and tenon 11 includes a second body 1106, a first rotating groove 1107 disposed on a first side of the second body 1106, a first stopper 1108 connected on a second side of the second body 1106, and a first rotating block 1109 connected on a second side of the first stopper 1108; the first rotation groove 1107 is provided with a first opening 11071 for passing through a first stop 1108 of an adjacent metal mortise and tenon joint part 11, and the first rotation groove 1107 is used for accommodating a first rotation block 1109 of the adjacent metal mortise and tenon joint part 11; the maximum width of the first rotating block 1109 is greater than the width of the first opening 11071; when the bendable pipe section 1 is bent, the first rotating block 1109 rotates relative to the first rotating groove 1107, and when the first rotating block 1109 of two adjacent metal mortise and tenon joint members 11 are abutted by the edge of the first opening 11071, the two adjacent metal mortise and tenon joint members 11 stop rotating. In an embodiment, the maximum width of the first rotating block 1109 is greater than the width of the first opening 11071, so that the first rotating block 1109 can be embedded in the first rotating groove 1107 to rotate without being separated, thereby realizing the rotation of the first rotating block 1109 in the first rotating groove 1107; the first stop 1108 is used for limiting the rotation angle between the two metal mortise and tenon joint parts 11.

In one embodiment, as shown in fig. 3 and 5, the metal mortise and tenon 11 further includes a second block 1110 connected to the inner sidewall of the first rotation groove 1107, and a second rotation block 1111 connected to the first side of the second block 1110 and located in the first rotation groove 1107; a second rotating groove 1112 is formed on the first rotating block 1109, and a second opening 11121 which is arranged away from the first opening 11071 and is used for allowing the second stop 1110 of the adjacent metal mortise and tenon joint 11 to pass through is formed on the second rotating groove 1112; the second rotating groove 1112 is configured to receive a second rotating block 1111 of an adjacent metal mortise and tenon joint member 11; the maximum width of the second rotating block 1111 is larger than the width of the second opening 11121; when the bendable pipe section 1 is bent, the first rotating block 1109 rotates relative to the first rotating groove 1107, the second rotating block 1111 rotates relative to the second rotating groove 1112, and when the first rotating block 1109 of two adjacent metal mortise and tenon joint members 11 abut against the edge of the first opening 11071 or the second rotating block 1111 abuts against the edge of the second opening 11121, the two adjacent metal mortise and tenon joint members 11 stop rotating. In an embodiment, the maximum width of the second rotating block 1111 is greater than the width of the second opening 11121, so that the second rotating block 1111 can be rotated to be inserted into the second rotating groove 1112 without being separated; the sections of the first rotating groove 1107 and the second rotating groove 1112 are arc-shaped, the sections of the first rotating block 1109 and the second rotating block 1111 are arc-shaped, the section of the first rotating block 1109 is matched with the section of the first rotating groove 1107, and the section of the second rotating groove 1112 is matched with the section of the second rotating groove 1112, so that the second rotating block 1111 can rotate in the second rotating groove 1112 while the first rotating block 1109 rotates in the first rotating groove 1107; the second stopper 1110 is used for limiting the rotation angle between the two metal mortise and tenon joint members 11.

In one embodiment, as shown in fig. 3 and 5, the metal mortise and tenon 11 further includes a third block 1113 connected to the inner sidewall of the second rotating groove 1112, and a third rotating block 1114 connected to the third block 1113 and located in the second rotating groove 1112; the second rotating block 1111 is provided with a third rotating groove 1115, and the third rotating groove 1115 is provided with a third opening 11151 for passing through a third stop 1113 of the adjacent metal mortise and tenon joint member 11; the third rotating groove 1115 is configured to receive the third rotating block 1114 of the adjacent metal mortise and tenon joint part 11; the maximum width of the third rotary block 1114 is larger than the width of the third opening 11151; when the bendable pipe section 1 is bent, the first rotating block 1109 rotates relative to the first rotating groove 1107, the second rotating block 1111 rotates relative to the second rotating groove 1112, the third rotating block 1114 rotates relative to the third rotating groove 1115, and when the first rotating block 1109 of two adjacent metal mortise and tenon joint pieces 11 abuts against the edge of the first opening 11071, the second rotating block 1111 abuts against the edge of the second opening 11121, or the third rotating block 1114 abuts against the edge of the third opening 11151, the two adjacent metal mortise and tenon joint pieces 11 stop rotating. In one embodiment, the maximum width of the third pivot block 1114 is greater than the width of the third opening 11151, so that the third pivot block 1114 can pivot into the third pivot slot 1115 without disengagement; the third rotating groove 1115 has a circular cross section, and the third rotating block 1114 has a circular cross section and is adapted to the cross section of the third rotating groove 1115, so that the second rotating block 1111 rotates in the second rotating groove 1112 while the first rotating block 1109 rotates in the first rotating groove 1107, and the third rotating block 1114 rotates in the third rotating groove 1115; third block 1113 is configured to limit the rotation angle between two metal mortise and tenon joint members 11.

In one embodiment, as shown in fig. 3 and 5, the third opening 11151 is disposed at a predetermined angle with respect to the opening direction of the second opening 11121. It is understood that the predetermined angle between the third opening 11151 and the opening direction of the second opening 11121 is 0 to 180 degrees. Preferably, the predetermined angle between the third opening 11151 and the opening direction of the second opening 11121 is 90 degrees.

In the embodiment of the utility model, the bending angle of the bendable pipe section 1 is improved by arranging at least two mutually-inserted metal mortise and tenon parts 11, wherein the metal mortise and tenon parts 11 are of round concave-convex combined mortise and tenon structures, so that the sheath mouth of the guiding sheath tube can more conveniently approach to the direction of stones in the kidney.

In one embodiment, as shown in fig. 3 and 5, the metal mortise and tenon joint 11 further includes a first locking groove 1116 and a second locking groove 1117 respectively disposed at two opposite sides of the second block 1110; opposite sides of the second opening 11121 are respectively provided with a first buckle 1118 matched with the first clamping groove 1116 and a second buckle 1119 matched with the second clamping groove 1117; when the bendable pipe section 1 is bent, the first rotating block 1109 rotates relative to the first rotating groove 1107, and the second rotating block 1111 rotates relative to the second rotating groove 1112; when the second stop 1110 of two adjacent metal mortise and tenon members 11 abuts against the edge of the second opening 11121, the two adjacent metal mortise and tenon members 11 stop rotating; when the first fastener 1118 is engaged with the first slot 1116 or the second fastener 1119 is engaged with the second slot 1117, the relative rotation positions of the adjacent two metal mortise and tenon members 11 are fixed. In one embodiment, the first and second clips 1118, 1119 are made of a soft material, and the first and second clips 1116, 1117 are made of a hard material, so that the first and second clips 1118, 1119 and the first and second clips 1116, 1117 may be embedded into each other and separated from each other under a certain force. It will be appreciated that the first and second clips 1118, 1119 may be made of hard and/or soft materials, and the first and second clips 1116, 1117 may be made of soft and/or hard materials, so long as the first and second clips 1118, 1116 are embedded in each other and separated from each other under a certain force, and the second clip 1119 and the second clip 1117 are embedded in each other and separated from each other under a certain force. In one embodiment, the first and second slots 1116, 1117 may be disposed on opposite sides of the third stop 1113, while the first and second snaps 1118, 1119 may be disposed on opposite sides of the third opening 11151. It can be appreciated that the first locking groove 1116 and the second locking groove 1117 and the corresponding first locking buckle 1118 and second locking buckle 1119 may be respectively disposed on the abutting surfaces of the adjacent two metal mortise and tenon joint members 11, so long as the adjacent two metal mortise and tenon joint members 11 can be fixed at a predetermined rotation position when relatively rotating.

In the embodiment of the present utility model, by providing the circular concave-convex combined metal mortise and tenon joint 11 with the clamping grooves (such as the first clamping groove 1116 and the second clamping groove 1117) and the clamping buckles (such as the first clamping buckle 1118 and the second clamping buckle 1119), when the bendable pipe section 1 is bent to a preset angle, the bendable pipe section 1 is enabled to enter a state of a fixed angle through the clamping connection of the clamping grooves and the clamping buckles. After the soft lens in the guiding sheath tube is withdrawn, the bendable pipe section 1 is still kept in the fixed angle state, so that the next negative pressure stone suction operation is convenient. If the locking state is required to be released, the flexible mirror is used for reversely bending to drive the bendable pipe section 1 to bend in the reverse direction, the clamping groove is buckled to release the clamping connection, and the bendable pipe section 1 is released from the fixed angle state.

As shown in fig. 6, an embodiment of the present utility model further provides an guiding device, which is characterized by comprising a dilator 4 and the detachable guiding sheath; the detachable guiding sheath tube further comprises a sheath tube joint 3, one end of the middle tube section 2 far away from the second connecting part 21 is installed on the sheath tube joint 3, and the expander 4 penetrates through the bendable tube section 1 and the middle tube section 2 to be connected with the sheath tube joint 3.

In the embodiment of the utility model, the guiding device comprises a detachable guiding sheath pipe and a dilator 4 penetrating through the detachable guiding sheath pipe and connected with a sheath pipe joint 3 of the detachable guiding sheath pipe, the detachable guiding sheath pipe is divided into a bendable pipe section 1 and a middle pipe section 2, and the connection mode of the bendable pipe section 1 and the middle pipe section 2 is set to be detachable connection, so that the bendable pipe section 1 can be detached and replaced by the bendable pipe section 1 with different structures when the guiding device is used, the guiding device can select the most suitable bendable pipe section 1 structure according to the physiological structure of a patient, and the lengths and the like of different bendable pipe sections 1 with the same structure can also be set according to practical conditions, thereby improving the adaptability of the guiding device. The guiding device can select the most suitable bendable pipe section 1 structure according to the physiological structure of a patient and bend the bendable pipe section 1 structure into a required shape, so that the guiding device can be close to stone fragments in the kidney through the bendable pipe section 1, and then the stone fragments are flushed out of the guiding device through water flow poured in an operation, so that the discharging efficiency of the stone fragments is improved, the situation that stone powder affects the visual field or is accumulated in the kidney to affect the operation efficiency is avoided, the uncertainty of natural stone discharging is avoided, and the stone clearance is improved.

The above embodiments of the removable guide sheath and the guide device of the present utility model are merely examples, and are not intended to limit the present utility model, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims (10)

1. The utility model provides a can dismantle guiding sheath pipe which characterized in that, include the middle pipe section and with the middle pipe section can dismantle the flexible pipe section of connection, be equipped with first connecting portion on the flexible pipe section the last second connecting portion that is equipped with of middle pipe section, the middle pipe section pass through the second connecting portion with first connecting portion can dismantle the connection.

2. The detachable introducer sheath of claim 1, wherein the intermediate tube segment comprises a first protective layer, a support structure layer, and a second protective layer, the first protective layer being wrapped around an outer sidewall of the support structure layer, the second protective layer being wrapped around an inner sidewall of the support structure layer.

3. The removable introducer sheath of claim 2, wherein the support structure layer is a spring layer.

4. The removable introducer sheath of claim 2, wherein the first protective layer is a layer of PEBAX material.

5. The removable introducer sheath of claim 2, wherein the second protective layer is a layer of PTFE material.

6. The removable introducer sheath of claim 1, wherein the first coupling portion is an internal or external thread disposed on the flexible tube segment and the second coupling portion is an external or internal thread disposed on the intermediate tube segment and threadably coupled to the first coupling portion.

7. The detachable introducer sheath of claim 1, wherein the first connection portion is a clip groove or clip provided on the flexible tube segment, and the second connection portion is a clip groove or clip provided on the intermediate tube segment and snap-connected to the first connection portion.

8. The removable introducer sheath of claim 1, wherein the flexible tube segment comprises a flexible hose.

9. The detachable guide sheath according to claim 1, wherein the bendable pipe sections comprise mortise and tenon joint pipes, each mortise and tenon joint pipe comprises at least two metal mortise and tenon joint pieces and an elastic layer coated on the outer surfaces of all the metal mortise and tenon joint pieces, and each metal mortise and tenon joint piece is inserted in sequence along the axial direction of the middle pipe section; the mortise and tenon joint pipe is used for bending relative to the axial direction of the middle pipe section through relative sliding between the metal mortise and tenon joint pieces when the mortise and tenon joint pipe receives lateral force.

10. An introducer device comprising a dilator and a removable introducer sheath according to any one of claims 1 to 9; the detachable guiding sheath tube further comprises a sheath tube joint, one end of the middle tube section, which is far away from the second connecting part, is installed on the sheath tube joint, and the expander penetrates through the bendable tube section and the middle tube section to be connected with the sheath tube joint.