CN213554703U

CN213554703U - Tearable sheath

Info

Publication number: CN213554703U
Application number: CN202021523050.5U
Authority: CN
Inventors: 高晓飞; 李杭燕; 许轶洲
Original assignee: Hangzhou First Peoples Hospital
Current assignee: Hangzhou First Peoples Hospital
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-06-29
Anticipated expiration: 2030-07-28

Abstract

The utility model discloses a tearable sheath, which comprises a handle, an outer sheath, a non-return device and an inner sheath, wherein the handle is arranged at the rear end of the outer sheath, the handle is divided into two parts with the middle part broken, the handle comprises a connecting section, the connecting section is arranged at the rear end of the outer sheath, and the shape of the connecting section is the same as that of the outer sheath; the middle part of the outer sheath is provided with a through hole; the non-return device is arranged in the connecting section at the rear end of the outer sheath; the non-return device comprises a piston cap, a reset piece, a valve core and a non-return shell, the non-return shell is communicated with the outer sheath in a staggered mode, and the non-return shell is provided with a channel for placing the valve core; the valve core moves in the non-return shell in a reciprocating manner, a limiting hole for the inner sheath to pass through is formed in the middle of the valve core, a positioning rod is arranged at one end, away from the reset piece, of the valve core, and the outer end of the positioning rod is inserted into the non-return shell; the piston cap seals the hemostatic housing passage; two ends of the reset piece are respectively propped between the valve core and the piston cap. The utility model discloses it is easy and simple to handle, including the sheath extract the back, can in time prevent that blood from flowing out, gaseous entering is internal, avoids causing the secondary harm to the patient, makes things convenient for medical personnel to operate for efficiency.

Description

Tearable sheath

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to can tear sheath.

Background

The interventional therapy is a minimally invasive operation, and the operation mode is widely popularized due to the advantages of small wound, good curative effect, low cost and the like, and is effectively developed and utilized in the treatment aspect of cardiovascular and tumor diseases at present.

The tearable sheath is a catheter sheath used in interventional therapy, the use of the tearable sheath is very inconvenient because the bottom of the existing tearable sheath does not have a proper non-return structure, for example, when permanent cardiac pacing is performed, when the inner sheath is pulled out or an electrode is pulled out in the operation to clean the tissue at the electrode head end, because a channel in the outer sheath communicates with the inner cavity of a blood vessel and the outside of the body, when the venous pressure is higher, blood flows to the outside through the outer sheath, or gas is sucked into the body to cause air embolism when a patient inhales deeply, therefore, after the inner sheath is pulled out, how to seal the channel in the outer sheath is to prevent the blood in the outer sheath from seeping or the gas from entering the body, which is a technical problem to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tearable sheath aiming at the defects of the prior art.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a tearable sheath comprises a handle, an outer sheath, a non-return device and an inner sheath, wherein the handle is arranged at the rear end of the outer sheath, the handle is divided into two parts, the middle of the handle is divided, the handle comprises a connecting section, and the connecting section is arranged at the rear end of the outer sheath and has the same shape as the outer sheath; the middle part of the outer sheath is provided with a through hole; the non-return device is arranged in the connecting section at the rear end of the outer sheath; the non-return device comprises a piston cap, a reset piece, a valve core and a non-return shell, the non-return shell is communicated with the outer sheath in a staggered mode, and the non-return shell is provided with a channel for placing the valve core; the valve core moves in the non-return shell in a reciprocating manner, a limiting hole for the inner sheath to pass through is formed in the middle of the valve core, a positioning rod is arranged at one end, away from the reset piece, of the valve core, and the outer end of the positioning rod is inserted into the non-return shell; the piston cap seals the hemostatic housing passage; two ends of the reset piece are respectively propped between the valve core and the piston cap.

Preferably, the positioning rod is provided with a limiting ring.

Preferably, the limiting ring is located at the part of the positioning rod extending out of the connecting section, and when the limiting ring reaches the limit position, namely, when the limiting ring touches the outer wall of the connecting section, the surface of the limiting hole is flush with the surface of the through hole.

Preferably, the reset member is a cylindrical coil spring.

Preferably, the surface of the piston cap facing the valve core is provided with a groove, the valve core is provided with a connecting rod, the resetting piece is sleeved on the connecting rod, and the connecting rod is inserted into the groove.

Preferably, the non-return shell is provided with an extension piece, the extension piece wraps the periphery of the positioning rod, and the extension piece is provided with a clamping structure which comprises a rotating shaft, a clamping jaw and a clamping groove; the clamping jaw is hinged with the extending piece through a rotating shaft; the clamping groove is positioned on the outer wall of the positioning rod; the clamping jaws are matched with the clamping grooves; the pivot still is equipped with the torsional spring, the torsional spring is used for compressing tightly the jack catch in the locating lever outer wall.

Preferably, a hand tearing section is arranged on the handle.

The utility model discloses compare in prior art, there are following beneficial effect: the utility model discloses it is easy and simple to handle, after the sheath is extracted, can in time prevent to flow back, avoid causing the secondary harm to the patient, make things convenient for medical personnel to operate for efficiency.

Drawings

Fig. 1 is a schematic structural view of the tearable sheath of the present invention;

FIG. 2 is a cross-sectional view of the handle assembly of the present invention;

FIG. 3 is a cross-sectional view of embodiment 1 of the present invention;

FIG. 4 is a cross-sectional view of embodiment 1 of the present invention;

FIG. 5 is a cross-sectional view of embodiment 1 of the present invention;

fig. 6 is a cross-sectional view of embodiment 2 of the present invention;

fig. 7 is a cross-sectional view of embodiment 2 of the present invention;

reference numerals: 1. a handle; 11. a hand-tearing segment; 12. a connecting section; 120. an extension member; 121. an articulator; 122. a claw; 2. an outer sheath; 20. a through hole; 3. a non-return device; 30. a piston cap; 300. a groove; 31. a reset member; 32. a valve core; 320. a connecting rod; 33. a limiting hole; 34. positioning a rod; 340. a card slot; 35. a limiting ring; 4. an inner sheath.

Reference numerals: 1. a handle; 11. a hand-tearing segment; 12. a connecting section; 120. an extension member; 121. a rotating shaft; 122. a claw; 2. an outer sheath; 20. a through hole; 3. a non-return device; 30. a piston cap; 300. a groove; 31. a reset member; 32. a valve core; 320. a connecting rod; 33. a limiting hole; 34. positioning a rod; 340. a card slot; 35. a limiting ring; 4. an inner sheath.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Example 1:

a tearable sheath comprises a handle 1, an outer sheath 2, a non-return device 3 and an inner sheath 4, wherein the handle 1 is arranged at the rear end of the outer sheath 2, the handle 1 is divided into two parts, the middle part of the handle is broken, the handle 1 comprises a connecting section 12, the connecting section 12 is arranged at the rear end of the outer sheath 2, and the shape of the connecting section 12 is the same as that of the outer sheath 2; the middle part of the outer sheath 2 is provided with a through hole 20; the non-return device 3 is arranged in the connecting section 12 at the rear end of the outer sheath 2; the non-return device 3 comprises a piston cap 30, a reset piece 31, a valve core 32 and a non-return shell, the non-return shell is communicated with the outer sheath 2 in a staggered mode, and the non-return shell is provided with a channel for placing the valve core 32; the valve core 32 reciprocates in the non-return shell, the middle part of the valve core 32 is provided with a limiting hole 33 for the inner sheath 4 to pass through, one end of the valve core 32, which is far away from the reset piece 31, is provided with a positioning rod 34, and the outer end of the positioning rod 34 is inserted into the non-return shell; the piston cap 30 closes the hemostatic housing passage; the two ends of the reset piece 31 are respectively abutted between the valve core 32 and the piston cap 30.

The utility model discloses compare in prior art, there are following beneficial effect: the utility model discloses it is easy and simple to handle, including sheath 4 extract the back, original position is in time replied to case 32, can in time prevent to flow back, avoids causing the secondary harm to the patient, makes things convenient for medical personnel to operate for efficiency.

The handle 1 is provided with a hand tearing section 11. The tear-off section 11 can effectively improve the efficiency of tearing off the tearable sheath by medical personnel.

The positioning rod 34 is provided with a limit ring 35. The limiting ring 35 is located at the part of the positioning rod 34 extending out of the connecting section 12, and when the limiting ring 35 reaches the limit position, namely, contacts with the outer wall of the connecting section 12, the surface of the limiting hole 33 is flush with the surface of the through hole 20. The spacing ring 35 can avoid medical personnel to exert oneself too greatly, leads to the locating lever 34 to get into too deeply, can't effectively tear.

The restoring member 31 is a cylindrical coil spring. The surface of the piston cap 30 facing the valve core 32 is provided with a groove 300, the valve core 32 is provided with a connecting rod 320, the resetting piece 31 is sleeved on the connecting rod 320, and the connecting rod 320 is inserted into the groove 300. The recess 300 can define the position of the reset member 31 and the connecting rod 320 to avoid misalignment.

The application process of the embodiment is as follows:

use the utility model provides a during can tearing the sheath, at first in the sheath 2 access vein blood vessels that can tear the sheath, insert inner sheath 4 in 2 through-holes 20 of sheath again, press the locating lever, reach extreme position to spacing ring 35, when touching with linkage segment 12 outer wall promptly, inner sheath 4 continues inwards to stretch into, get into vein blood vessel along through-hole 20, accomplish the operation back, take out inner sheath 4, get rid of unnecessary bubble and blood, reset 31 drive valve core 32 motion this moment, make spacing hole 33 no longer with through-hole 20 to it, alright prevent blood reflux.

Example 2:

this example is based on example 1, and differs from example 1 in that: the non-return shell is provided with an extension piece 120, the extension piece 120 wraps the periphery of the positioning rod 34, and the extension piece 120 is provided with a clamping structure which comprises a rotating shaft 121, a clamping jaw 122 and a clamping groove 340; the jaw 122 is hinged with the extension piece 120 through the rotating shaft 121; the clamping groove 340 is positioned on the outer wall of the positioning rod 34; the clamping jaws 122 are matched with the clamping grooves 340; the rotating shaft 121 is further provided with a torsion spring, and the torsion spring is used for pressing the clamping jaw 122 on the outer wall of the positioning rod 34. The claw 122 is matched with the clamping groove 340, so that the medical staff is prevented from touching the through hole 20 by mistake, the through hole is contacted with the limiting hole 33, a passage is formed, and the non-return effect cannot be achieved.

The above description is the preferred embodiment of the present invention, and a person skilled in the art can make several modifications and improvements without departing from the principles of the present invention, and these are also regarded as the protection scope of the present invention.

Claims

1. A tearable sheath, characterized in that: the anti-blocking device comprises a handle (1), an outer sheath (2), a non-blocking device (3) and an inner sheath (4), wherein the handle (1) is arranged at the rear end of the outer sheath (2), the handle (1) is divided into two parts, the middle part of the handle is broken, the handle (1) comprises a connecting section (12), and the connecting section (12) is arranged at the rear end of the outer sheath (2) and has the same shape as the outer sheath (2); a through hole (20) is formed in the middle of the outer sheath (2); the non-return device (3) is arranged in the connecting section (12) at the rear end of the outer sheath (2);

the non-return device (3) comprises a piston cap (30), a reset piece (31), a valve core (32) and a non-return shell,

the non-return shell is communicated with the outer sheath (2) in a staggered way, and is provided with a channel for placing the valve core (32);

the valve core (32) moves in the non-return shell in a reciprocating mode, a limiting hole (33) for the inner sheath (4) to pass through is formed in the middle of the valve core (32), a positioning rod (34) is arranged at one end, far away from the resetting piece (31), of the valve core (32), and the outer end of the positioning rod (34) is inserted into the non-return shell;

a piston cap (30) closes the hemostatic housing passage;

two ends of the reset piece (31) respectively abut against the valve core (32) and the piston cap (30).

2. A tearable sheath according to claim 1, wherein: the positioning rod (34) is provided with a limiting ring (35) on the positioning rod (34).

3. A tearable sheath according to claim 2, wherein: the limiting ring (35) is located on the part, extending out of the connecting section (12), of the positioning rod (34), and when the limiting ring (35) reaches the limit position, namely, when the limiting ring touches the outer wall of the connecting section (12), the surface of the limiting hole (33) is flush with the surface of the through hole (20).

4. A tearable sheath according to claim 1, wherein: the reset piece (31) is a cylindrical spiral spring.

5. A tearable sheath according to claim 4, wherein: the surface of the piston cap (30) facing the valve core (32) is provided with a groove (300), the valve core (32) is provided with a connecting rod (320), the resetting piece (31) is sleeved on the connecting rod (320), and the connecting rod (320) is inserted into the groove (300).

6. A tearable sheath according to claim 1, wherein: the non-return shell is provided with an extension piece (120), the extension piece (120) wraps the periphery of the positioning rod (34), the extension piece (120) is provided with a clamping structure, and the clamping structure comprises a rotating shaft (121), a clamping jaw (122) and a clamping groove (340);

the clamping jaw (122) is hinged with the extending piece (120) through a rotating shaft (121);

the clamping groove (340) is positioned on the outer wall of the positioning rod (34); the clamping jaw (122) is matched with the clamping groove (340);

the rotating shaft (121) is further provided with a torsion spring, and the torsion spring is used for pressing the clamping jaw (122) on the outer wall of the positioning rod (34).

7. A tearable sheath according to claim 1, wherein: the handle (1) is provided with a hand tearing section (11).