A suction sheath and method of using the same

Abstract

The present invention belongs to the technical field of medical devices, and specifically relates to an aspiration sheath and a method for using the same, comprising a plastic outer sheath, an inner sheath and a perfusion jacket, wherein the perfusion jacket is fixedly arranged on the inner sheath, a perfusion channel one is formed between the inner wall of the perfusion jacket and the outer wall of the inner sheath, a support piece is protruding from the outer wall of the inner sheath or the inner wall of the plastic outer sheath, the plastic outer sheath is detachably sleeved on the inner sheath and mutually supported by the support piece, a perfusion channel two is formed between the inner wall of the plastic outer sheath and the outer wall of the inner sheath, the perfusion channel two is communicated with the perfusion channel one, and also comprises a blocking ring arranged between the perfusion jacket and the plastic outer sheath, the blocking ring is used to block an opening between the perfusion jacket and the plastic outer sheath, the present invention retains the plastic outer sheath, increases the safety of the operation, and provides the support piece and the blocking ring, so that the plastic outer sheath can be closely fitted with the inner sheath while blocking the opening, and the perfusion channel two is communicated with the perfusion channel one without other branches or openings, thereby facilitating the use of the perfusion device.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an aspiration sheath and a use method thereof. Background Art

[0002] Ultramicrochannels require surgical instruments to have the following requirements: the outer diameter of the straight sheath should be as small as possible, but the maximum perfusion and return water should be retained. In the past, the sheath was a plastic sheath, and the material could not meet the required hardness and interlayer thickness. Currently, it is generally changed to a double-layer metal sheath, but in actual work, the following shortcomings are found: 1. Because it is made of metal, it feels drier and has greater resistance than plastic sheaths during expansion. 2. The metal interlayer has the risk of blood clot clogging, inconvenient cleaning, and substandard disinfection.

[0003] The Chinese utility model patent with application number "CN20142039" and name "A percutaneous renal pressure automatic balance circulating water perfusion suction stone removal device" records a stone removal device with a detachable outer sheath and inner sheath, which solves the hidden dangers of inconvenient cleaning and difficult disinfection of metal interlayers. However, its outer sheath can only be a metal sheath. When a plastic outer sheath is used, there will be the following problems, such as inconvenient installation, the outer sheath will fit with the inner sheath during use, resulting in poor perfusion effect, and in addition, the outer sheath and inner sheath are snap-connected, and there are doubts about water leakage and connection tightness. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a suction sheath which retains a plastic outer sheath and has a stable structure and smooth perfusion, and a use method thereof.

[0005] The invention provides an aspiration sheath, comprising a plastic outer sheath, an inner sheath and a perfusion jacket, wherein one end of the perfusion jacket is fixedly arranged on the inner sheath, and the other end has an opening, a perfusion channel 1 is formed between the inner wall of the perfusion jacket and the outer wall of the inner sheath, the outer wall of the inner sheath or the inner wall of the plastic outer sheath is protrudingly provided with a support piece, the plastic outer sheath is detachably sleeved on the inner sheath and mutually supported by the support piece, one end of the plastic outer sheath extends into the perfusion channel 1, a perfusion channel 2 is formed between the inner wall of the plastic outer sheath and the outer wall of the inner sheath, the perfusion channel 2 is communicated with the perfusion channel 1, and a blocking ring is also included which is arranged between the perfusion jacket and the plastic outer sheath, and the blocking ring is used to block the opening between the perfusion jacket and the plastic outer sheath.

[0006] Furthermore, the blocking ring is made of elastic material. When the blocking ring is arranged between the perfusion jacket and the plastic outer sheath, the blocking ring is elastically deformed, and squeezes the plastic outer sheath to be tightly fixed on the inner sheath.

[0007] Furthermore, a fixing sleeve is sleeved on the perfusion outer sleeve, and the sealing ring is arranged between the fixing sleeve and the plastic outer sheath. The fixing sleeve and the sealing ring cooperate with each other and are arranged tilted on one side.

[0008] Furthermore, the blocking ring is threadedly connected to the fixing sleeve.

[0009] Furthermore, the support members are arranged along the axis direction of the inner sheath, the support members are in strip, block or spiral shape, and a perfusion channel three is provided on the support members along the axis direction of the inner sheath.

[0010] Furthermore, when the support members are in strip or block shape, a plurality of them are distributed in a circular array along the axis of the inner sheath.

[0011] The suction sheath also includes a limiting member arranged in the perfusion channel 1, and the limiting member is fixedly arranged on the outer wall of the inner sheath or the inner wall of the perfusion jacket.

[0012] Furthermore, the limiting members are in the shape of a ring or blocks arranged in a ring array.

[0013] Furthermore, a negative pressure suction channel is connected to the inner sheath at a side away from the plastic outer sheath.

[0014] The present invention also provides a method for using an aspiration sheath, comprising the aspiration sheath, comprising the following steps:

[0015] S1, use a plastic sheath to establish a percutaneous renal channel and remove the inner core of the plastic sheath;

[0016] S2, insert the inner sheath into the plastic outer sheath until the end of the inner sheath is aligned with the end of the plastic outer sheath under the skin;

[0017] S3. Seal the opening between the injection jacket and the plastic sheath with a sealing ring.

[0018] The beneficial effects of the present invention are that the present invention retains the commonly used plastic outer sheath, and the plastic outer sheath and the inner sheath are detachably connected, which can eliminate the hidden dangers of lax cleaning and disinfection, reduce the incidence of hospital infection, and in addition, doctors do not need to be familiar with the feel of the new metal material, are familiar with the operation process, use it without dryness, and the feel is consistent with normal operation, which increases the safety of the operation. At the same time, by setting the support member, it is ensured that the plastic outer sheath will not be deformed during the operation process. At the same time, a perfusion channel 2 can be formed between the inner wall of the plastic outer sheath and the inner sheath, which is connected to the perfusion channel 1 for conveying cleaning solution or saline. By setting the blocking ring, the opening between the perfusion coat and the plastic outer sheath can be blocked while the plastic outer sheath of the part can be closely fitted with the inner sheath, that is, the plastic outer sheath is fixed and limited on the inner sheath, so that when medical personnel perform surgical operations, the plastic outer sheath and the inner sheath will not be relatively displaced, which ensures safety, and the perfusion channel 2 is connected with the perfusion channel 1 and does not have other branches or openings, which is convenient for the use of the perfusion equipment and improves the flexibility of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure when the fixing sleeve is provided in the present invention;

[0021] Figure 3 A structural schematic diagram of another method of setting a fixing sleeve of the present invention;

[0022] Figure 4 for Figure 3 Cross-section at AA;

[0023] Figure 5 It is a schematic diagram of the structure when the position limiting members of the present invention are arranged in a ring array;

[0024] Figure 6 for Figure 5 Cross-section at the middle BB;

[0025] Figure 7 is a schematic diagram of a first structural mode of a support member in the present invention;

[0026] Figure 8 for Figure 7 A front cross-sectional view of the mating plastic sheath;

[0027] Fig. 9 is a schematic diagram of a second structural mode of the support member in the present invention;

[0028] Fig.10 for Fig. 9 A front cross-sectional view of the mating plastic sheath;

[0029] Fig.11 is a schematic diagram of a third structural mode of the support member in the present invention;

[0030] Fig.12 for Fig.11 A front cross-sectional view of the mating plastic sheath;

[0031] Fig.13 is a schematic diagram of a fourth structural mode of the support member in the present invention;

[0032] Fig.14 for Fig.13 A front cross-sectional view of the mating plastic sheath;

[0033] Fig.15 is a schematic diagram of a fifth structural mode of the support member in the present invention;

[0034] Fig.16 for Fig.15 Front cross-sectional view of the mating plastic sheath.

[0035] In the figure, 1-plastic outer sheath; 2-inner sheath; 21-operating hole; 22-waterproof cover; 3-infusion outer sleeve; 31-fixing sleeve; 4-infusion channel one; 5-infusion channel two; 6-sealing ring; 7-infusion channel three; 8-limiting member; 9-support member; 10-negative pressure suction channel. DETAILED DESCRIPTION

[0036] like Figure 1-16 As shown, the present invention includes a plastic outer sheath 1, an inner sheath 2 and a perfusion jacket 3, wherein the plastic outer sheath 1, the inner sheath 2 and the perfusion jacket 3 are all tubular structures, and the inner sheath 2 is preferably made of metal to ensure thickness and structural strength. One end of the perfusion jacket 3 is fixedly arranged on the inner sheath 2, and the other end has an opening, and a perfusion connecting pipe is connected to the fixed end of the inner sheath 2. The perfusion connecting pipe of the perfusion jacket 3 is used to connect a perfusion pump, and a perfusion channel 1 4 is formed between the inner wall of the perfusion jacket 3 and the outer wall of the inner sheath 2. After the plastic outer sheath 1 and the inner sheath 2 are connected, the perfusion channel 2 5 is connected to the perfusion channel 1 4, and the perfusion pump is used to After the inner sheath 2 is connected to the plastic outer sheath 1, a cleaning solution or saline is injected into the surgical operation part to flush away foreign matter or human tissue at the operation site. The outer wall of the inner sheath 2 or the inner wall of the plastic outer sheath 1 is protruded with a support member 9. The plastic outer sheath 1 is detachably sleeved on the inner sheath 2 and supported by the support member 9, and the structural strength of the plastic outer sheath 1 is ensured. One end of the plastic outer sheath 1 extends into the perfusion channel 1 4, and a perfusion channel 2 5 is formed between the inner wall of the plastic outer sheath 1 and the outer wall of the inner sheath 2. The support member 9 is preferably arranged on the outer wall of the inner sheath 2. After the inner sheath 2 and the plastic outer sheath 1 are sleeved with each other, they are kept relatively close by the support member 9. The support member 9 is arranged to ensure that the outer dimensions of the plastic sheath 1 will not be deformed, thereby improving the safety of the operation, facilitating precise operation of medical personnel, and avoiding accidental injury to human tissue. The present invention also includes a blocking ring 6 arranged between the perfusion jacket 3 and the plastic sheath 1, and the blocking ring 6 is used to block the opening between the perfusion jacket 3 and the plastic sheath 1. The blocking ring 6 is arranged on the perfusion jacket 3. 3 and the plastic outer sheath 1, the blocking ring 6 needs to be closely fitted with the perfusion jacket 3 and the plastic outer sheath 1 respectively to achieve a blocking effect. While blocking, the plastic outer sheath 1 of this part can be closely fitted with the inner sheath 2, that is, the plastic outer sheath 1 is fixed and limited on the inner sheath 2, so that when the medical staff performs the operation, the plastic outer sheath 1 and the inner sheath 2 will not be relatively displaced, thereby ensuring safety. Among them, due to the provision of the blocking ring 6, the perfusion channel 2 5 is connected with the perfusion channel 1 4 and has no other branches or openings. All the water transported to the perfusion channel 1 4 by the perfusion pump flows into the surgical part of the patient through the perfusion channel 2 5.

[0037] The current plastic outer sheath is generally replaced by a metal sheath because the material cannot reach the required hardness and interlayer thickness. However, it is found in actual work that the metal material feels drier and has greater resistance than the plastic sheath during expansion, and the use experience is not as good as the plastic sheath. The present invention retains the commonly used plastic outer sheath 1. When the support member 9 is arranged on the inner sheath 2, the plastic outer sheath 1 can adopt the current ordinary disposable plastic outer sheath. The plastic outer sheath 1 and the inner sheath 2 are detachably connected, which can eliminate the hidden dangers of lax cleaning and disinfection, and reduce the incidence of hospital infection. The doctor does not need to be familiar with the feel of the new metal material, and the operation process is familiar. There is no dryness when using it, and the feel is consistent with the usual operation, which increases the safety of the operation. At the same time, by setting the support member 9, it is ensured that the plastic outer sheath 1 will not be deformed during the operation. At the same time, an infusion channel 5 can be formed between the inner wall of the plastic outer sheath 1 and the inner sheath 2 for conveying cleaning solution or saline, providing infusion equipment, and improving the flexibility of the operation.

[0038] Among them, the sealing ring 6 is preferably made of elastic material. When the sealing ring 6 is arranged between the perfusion sleeve 3 and the plastic outer sheath 1, the sealing ring 6 elastically deforms, squeezes the plastic outer sheath 1 and fixes it on the inner sheath 2, further improving the sealing effect and the fixing effect of the plastic outer sheath 1, and at the same time simplifying the installation difficulty of the sealing ring 6.

[0039] like Figure 2 and Figure 3 As shown, a fixing sleeve 31 is sleeved on the perfusion sleeve 3, wherein the fixing sleeve 31 can be integrally formed with the perfusion sleeve 3 or movably sleeved with the perfusion sleeve 3, and the blocking ring 6 is arranged between the fixing sleeve 31 and the plastic outer sheath 1. By setting the fixing sleeve 31, the blocking ring 6 is prevented from affecting the perfusion channel 4, and the installation and removal of the blocking ring 6 are facilitated. In addition, the fixing sleeve 31 and the blocking ring 6 cooperate with each other and are tilted on one side, so that the tighter they are fixed, the easier it is to control the tightness and avoid excessive extrusion and damage to the structure of the perfusion sleeve 3. In addition, the plastic outer sheath 1 is tightly fixed on the inner sheath 2 while the blocking ring 6 blocks the opening.

[0040] The blocking ring 6 is threadedly connected to the fixing sleeve 31. Preferably, the inclined portion of the fixing sleeve 31 is provided with an internal thread, and the outer ring of the blocking ring 6 is provided with an external thread. The threaded connection can prevent the blocking ring 6 from axial movement and separation, thereby improving stability and reliability.

[0041] like Figure 7-16 As shown, the support members 9 are arranged along the axial direction of the inner sheath 2, that is, the support members 9 are arranged in the length direction of the inner sheath 2 and the plastic outer sheath 1 to ensure that each part in the length direction has a good support effect. The support members 9 are strip-shaped, block-shaped or spiral-shaped, such as Figure 1-811-12 are schematic diagrams of the structure when the support member 9 is in a block shape. When the block shape is adopted, the specific block shape can be a square or a circular convex point. The support member 9 is arranged in a plurality of groups in a circular array along the axis of the inner sheath 2 and a plurality of groups are arranged equidistantly along the axis direction to ensure the support effect of each part while ensuring the smooth flow of the perfusion channel 25. Fig. 9 When the support member 9 is in strip shape, multiple groups of support members 9 are arranged in an annular array to ensure the support effect in all radial directions. When the support member 9 is in strip or block shape, multiple groups are distributed in an annular array along the axis of the inner sheath 2, such as Figure 13-16 The support block can also be in a spiral shape, with the starting point and the end point of the spiral respectively at the two ends of the inner sheath 2. When a spiral shape is adopted, the cleaning fluid or saline is injected into the surgical site in a rotating manner to improve the water injection effect. In addition, a perfusion channel three 7 is preferably provided on the support member 9 along the axial direction of the inner sheath 2. In this embodiment, the perfusion channel three 7 is actually a part of the perfusion channel two 5, ensuring that there is a channel on the perfusion channel two 5 for the cleaning fluid or saline to flow directly along the axial direction, thereby improving the circulation effect of the cleaning fluid.

[0042] In addition, the present invention also includes a limit member 8 arranged in the perfusion channel 4, and the limit member 8 is fixedly arranged on the outer wall of the inner sheath 2 or the inner wall of the perfusion jacket 3. By setting the limit member 8, the inner sheath 2 is prevented from being excessively inserted into the plastic outer sheath 1, and the end of the inner sheath 2 can be ensured to be flush with the end of the plastic outer sheath 1.

[0043] The stopper 8 is annular or in blocks arranged in an annular array. In order to prevent the stopper 8 from affecting the flow of the perfusion channel 4, when the stopper 8 is annular, the size of the stopper 8 is smaller than the size between the inner wall of the perfusion jacket 3 and the outer wall of the inner sheath 2. At the same time, the end of the plastic outer sheath 1 cannot fit tightly with the stopper 8. Figure 5-6 As shown, the limiting member 8 is preferably in the form of blocks arranged in a circular array, and the channels between the blocks can be used to circulate water. In this way, when the inner sheath 2 is inserted into the plastic outer sheath 1, the plastic outer sheath 1 can be directly abutted against the limiting member 8 for limiting. When the plastic outer sheath 1 abuts against the limiting member 8, the other end is flush with the end of the inner sheath 2, which greatly reduces the difficulty of installation.

[0044] The inner sheath 2 is further connected to a negative pressure suction channel 10 on the side away from the plastic outer sheath 1, which is used to extract gravel, foreign matter, cleaning fluid or saline from the surgical site to improve hand flexibility.

[0045] The present invention also provides a method for using an aspiration sheath, comprising the aspiration sheath, comprising the following steps:

[0046] S1, using the plastic sheath 1 to establish a percutaneous renal channel, and removing the inner core of the plastic sheath 1;

[0047] S2, insert the inner sheath 2 into the plastic outer sheath 1 until the end of the inner sheath 2 is aligned with the end of the plastic outer sheath 1 under the skin;

[0048] S3, sealing the opening between the perfusion sleeve 3 and the plastic outer sheath 1 by means of the sealing ring 6.

[0049] Specifically, after step S3, the endoscope or operating rod is inserted into the waterproof cover 22 and the operating hole 21 of the inner sheath 2 to enter the inner cavity for observation or surgical operation. During the surgical operation, the irrigation pump can be turned on to deliver cleaning solution or saline to the surgical part through the irrigation channel 1 4 and the irrigation channel 2 5. At the same time, the negative pressure suction device is turned on to form a suction channel between the outer wall of the operating rod and the inner wall of the inner sheath 2 to extract gravel, water or other foreign matter, forming a loop, thereby achieving the flushing and absorption of gravel and foreign matter.

Claims

1. A suction sheath, characterized in that it includes A plastic outer sheath (1), an inner sheath (2) and a perfusion jacket (3), wherein one end of the perfusion jacket (3) is fixedly arranged on the inner sheath (2) and the other end has an opening, a perfusion channel (4) is formed between the inner wall of the perfusion jacket (3) and the outer wall of the inner sheath (2), a support member (9) is protruding from the outer wall of the inner sheath (2) or the inner wall of the plastic outer sheath (1), the plastic outer sheath (1) is detachably sleeved on the inner sheath (2) and supported by the support member (9), the support member (9) is arranged along the axial direction of the inner sheath (2), one end of the plastic outer sheath (1) extends into the perfusion channel (4), and the plastic outer sheath (1) ) and the outer wall of the inner sheath (2), forming a perfusion channel 2 (5), the perfusion channel 2 (5) being communicated with the perfusion channel 1 (4), and further comprising a blocking ring (6) arranged between the perfusion jacket (3) and the plastic outer sheath (1), the blocking ring (6) being used to block the opening between the perfusion jacket (3) and the plastic outer sheath (1); the blocking ring (6) is made of elastic material, and the outer side of the blocking ring (6) is inclined, and when the blocking ring (6) is arranged between the perfusion jacket (3) and the plastic outer sheath (1), the blocking ring (6) elastically deforms, squeezes the plastic outer sheath (1) and presses it tightly onto the inner sheath (2); It also includes a limiting member (8) arranged in the perfusion channel 1 (4), wherein the limiting member (8) is fixedly arranged on the outer wall of the inner sheath (2) or the inner wall of the perfusion outer sheath (3).

2. The suction sheath according to claim 1, characterized in that: A fixing sleeve (31) is sleeved on the perfusion outer sleeve (3), and the sealing ring (6) is arranged between the fixing sleeve (31) and the plastic outer sheath (1). The fixing sleeve (31) and the sealing ring (6) cooperate with each other and are arranged at an angle on one side.

3. The suction sheath according to claim 2, characterized in that: The sealing ring (6) is threadedly connected to the fixing sleeve (31).

4. The suction sheath according to any one of claims 1 to 3, characterized in that: The support member (9) is in the shape of a strip, a block or a spiral, and a perfusion channel three (7) is arranged on the support member (9) along the axial direction of the inner sheath (2).

5. The suction sheath according to claim 4, characterized in that: When the support member (9) is in the shape of a strip or a block, a plurality of the support members (9) are distributed in a circular array along the axis of the inner sheath (2).

6. The suction sheath according to claim 1, characterized in that: The limiting member (8) is in the shape of a ring or a block arranged in a ring array.

7. The suction sheath according to claim 1, characterized in that: The side of the inner sheath (2) away from the plastic outer sheath (1) is also connected to a negative pressure suction channel (10).

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