Minimally invasive pulmonary obstructive device for thoracic surgery

Abstract

The present invention provides a minimally invasive obstructive pulmonary disease (OBD) device for thoracic surgery, which relates to the technical field of medical devices and includes a protective mounting part: a telescopic positioning part is installed on the protective mounting part; a docking clamping device is threadedly connected to the protective mounting part; two support members are rotatably connected to the telescopic positioning part, and the two telescopic positioning parts are installed opposite to each other; a driving device is slidably connected to the protective mounting part; a drainage device is fixedly mounted on the protective mounting part; the operation is simpler, and the lungs on both sides can be blocked at the same time, the practicality is stronger, the overall use is more flexible, and the stability of use and the sanitary effect can be effectively improved; it solves the problem that the current minimally invasive OBD devices for thoracic surgery cannot realize the limiting of both lungs at the same time, the practicality is poor, the telescopic positioning adjustment cannot be realized, and blood drainage cannot be realized, which is very likely to cause blood outflow infection.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a minimally invasive obstructive pulmonary disease (OBD) device for thoracic surgery. Background Art

[0002] Medical devices refer to instruments, equipment, appliances, in vitro diagnostic reagents and calibrators, materials and other similar or related items that are used directly or indirectly on the human body. In actual clinical medicine, thoracic surgery is an important diagnosis and treatment department because a large number of patients require surgical treatment. Minimally invasive surgery can minimize trauma. The lung organs in the body are large in size and need to be blocked to avoid affecting the surgical operation. At this time, a good minimally invasive obstructive lung device for thoracic surgery is particularly important.

[0003] However, as far as the current minimally invasive obstructive pulmonary disease (OBLD) devices used in thoracic surgery are concerned, they cannot simultaneously achieve the limit movement of both lungs, have poor practicality, cannot achieve telescopic positioning adjustment, are inconvenient to operate, and have poor flexibility. At the same time, they cannot achieve blood drainage, which can easily cause blood flow infection and affect the hygiene of the operating room. At the same time, the OBLD devices have poor stability and require manpower to assist in holding. Summary of the Invention

[0004] In view of this, the present invention provides a minimally invasive obstructive pulmonary disease device for thoracic surgery, which has a driving device that can simultaneously drive two supporting members to transmit the lung device, is more practical, and can effectively improve the efficiency of use. At the same time, the size of the blocking openings of the two lungs can be adjusted more conveniently, and automatic resetting can be achieved, which can effectively assist in improving the quality of surgery. At the same time, the overall structure is compact and can be suitable for minimally invasive small-mouth installation.

[0005] The present invention provides a minimally invasive obstructive pulmonary disease device for thoracic surgery, which specifically includes a protective mounting part: a telescopic positioning part is installed on the protective mounting part; a docking clamping device is threadedly connected to the protective mounting part; two support members are rotatably connected to the telescopic positioning part, and the two telescopic positioning parts are installed opposite to each other; a driving device is slidably connected to the protective mounting part; a drainage device is fixedly mounted on the protective mounting part; an expansion device is mounted on the drainage device; the protective mounting part includes: an installation plug-in cylinder, a tightening thread and a rotating mounting frame, a hexagonal hole is opened inside the installation plug-in cylinder; a tightening thread is provided on the installation plug-in cylinder; and a rotating mounting frame is fixedly connected inside the installation plug-in cylinder.

[0006] Optionally, the protective mounting portion further includes: a rotating threaded rod, on which a handle is provided; and the rotating threaded rod is rotatably connected to the rotating mounting frame.

[0007] Optionally, the support member includes: a supporting rotating rod and a rotating gear, and two supporting rotating rods are provided. The two supporting rotating rods are connected to the bottom of the telescopic sliding column in an oppositely staggered rotation manner; and the rotating gears are respectively fixedly connected to the two supporting rotating rods.

[0008] Optionally, the driving device further includes: a reset spring, wherein four reset springs are provided, and the four reset springs form a group of two, and the two groups of reset springs are respectively fixedly connected to the active rack plate and the driven rack plate; the other ends of the two groups of reset springs are respectively connected to the two sides of the telescopic sliding column.

[0009] Optionally, the drainage device includes: a drainage box, a drainage hole and a drainage tube, the drainage box is provided with a drainage hole; the drainage box is fixedly sleeved on the mounting plug-in tube; the drainage box is connected to the drainage tube.

[0010] Optionally, the telescopic positioning part includes: a telescopic sliding column, a wire reverse shaft and an installation threaded barrel, the telescopic sliding column is a hexagonal column structure; the telescopic sliding column is slidably connected to the installation plug-in barrel; the telescopic sliding column is fixedly connected to the wire reverse shaft; the telescopic sliding column is fixedly connected to the installation threaded barrel, and the installation threaded barrel is threadedly connected to a rotating threaded rod.

[0011] Optionally, the expansion device further includes: an inflation tube, the inflation tube passes through the expansion mounting ring, the drainage box and the mounting plug-in tube; the inflation tube is connected to the expansion airbag; and a valve is provided at the end of the inflation tube.

[0012] Optionally, the docking clamping device includes: a clamping drive cylinder and a clamping fitting rubber ring, the clamping drive cylinder is threadedly connected to the tightening thread; the clamping drive cylinder is fixedly connected to the clamping fitting rubber ring.

[0013] Optionally, the expansion device includes: an expansion mounting ring and an expansion airbag, the expansion mounting ring is fixedly connected to the drainage box; and the expansion airbag is fixedly mounted on the expansion mounting ring.

[0014] Optionally, the driving device includes: an active rack plate, an active pull rope, a driven rack plate and a linkage pull rope, the rotating gear is slidingly connected to the inside of the telescopic sliding column; the active rack plate is engaged with the rotating gear on the same side; the active pull rope is fixedly connected to the active rack plate; the driven rack plate is slidingly connected to the telescopic sliding column; the driven rack plate is engaged with another rotating gear on the same side; the linkage pull rope is fixedly connected to the driven rack plate, and the linkage pull rope passes through the reverse shaft of the wire; the other end of the linkage pull rope is fixedly connected to the active rack plate.

[0015] Beneficial effects

[0016] The obstructive pulmonary disease device according to each embodiment of the present invention is simpler to operate, can simultaneously block the lungs on both sides, is more practical, and is more flexible to use overall, and can effectively improve the stability of use and the hygienic effect.

[0017] In addition, by setting up a docking clamping device, it is easier to clamp the minimally invasive incision quickly, improve the overall stability, avoid sliding of the installed insertion tube, and play a role in limiting. By setting up a telescopic positioning part, the overall flexibility of the use of this device can be effectively improved, and the adaptability is stronger. The telescopic depth can be freely adjusted. At the same time, the overall structure is compact, which can be more convenient to insert into the minimally invasive opening to avoid secondary damage. By simply rotating the rotating threaded rod, the telescopic sliding column can be driven to slide on the installing threaded tube. The overall design is simple and practical, and can have better adaptability. At the same time, the clamping drive tube can be rotated to drive the clamping fitting rubber ring to press the expansion airbag to achieve skin clamping. At the same time, another important function is that the clamping fitting rubber ring can ensure the skin fitting effect to avoid bleeding, which is more practical.

[0018] In addition, by setting up a driving device, it is possible to simultaneously drive the two supporting members to rotate and expand outward in both directions, which is more practical, can effectively improve the obstructive pulmonary disease effect, make obstructive pulmonary disease more efficient, and can effectively avoid the problem that unilateral obstructive pulmonary disease is still inconvenient for surgical operation. The overall structure is more practical, and the driving device set at the same time is simpler to use and can be achieved by a simple pull-wire. The structure is compact and ingenious, and the use of a reset spring can assist in automatic reset. The opening size of the two supporting rotating rods is more accurately controlled. When pulling the active pull rope, the active rack plate is driven to slide inward, and the linkage pull rope is pulled at the same time. The set wire is on the reverse axis to bypass the linkage pull rope, so that the linkage pull rope can pull the driven rack plate inward at the same time. At this time, the active rack plate and the driven rack plate realize rapid opposite sliding, driving the two rotating gears to expand and rotate outward at the same time. The overall structure is more practical, simple and convenient to operate, and more practical.

[0019] In addition, by setting up an expansion device, auxiliary gas expansion positioning can be achieved, so that the device can be stably placed in the body to avoid accidental slipping out, and can effectively avoid damage to internal organs caused by unstable equipment. The overall use is safer. In conjunction with the set drainage device, blood drainage can be achieved to avoid blood congestion and inability to discharge, affecting surgery. At the same time, it also avoids bacterial infection caused by direct placement outside the body without a drainage device. The overall hygiene effect is better, and the use is simpler and more stable. If there is blood, it will flow into the drainage tube through the drainage hole and then be discharged to achieve blood diversion. The overall structure is simple and stable, safer to use, and has higher hygiene standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0021] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached figure:

[0023] Figure 1 A schematic diagram of an overall obstructive pulmonary disease device according to an embodiment of the present invention is shown;

[0024] Figure 2 A schematic diagram showing the bottom of an obstructive pulmonary disease device according to an embodiment of the present invention is shown;

[0025] Figure 3 A cross-sectional view showing the internal structure of an obstructive pulmonary disease device according to an embodiment of the present invention;

[0026] Figure 4 A partial cross-sectional view of the internal structure of an obstructive pulmonary disease device according to an embodiment of the present invention is shown;

[0027] Figure 5 A schematic diagram of a protective mounting portion according to an embodiment of the present invention is shown;

[0028] Figure 6 A schematic diagram of a telescopic positioning portion according to an embodiment of the present invention is shown;

[0029] Figure 7 A schematic diagram of a docking clamping device according to an embodiment of the present invention is shown;

[0030] Figure 8 shows a schematic diagram of a support member according to an embodiment of the present invention;

[0031] Figure 9 A schematic diagram of a driving device according to an embodiment of the present invention is shown;

[0032] Figure 10 shows a cross-sectional view of a driving device according to an embodiment of the present invention;

[0033] Figure 11 A schematic diagram of a drainage device according to an embodiment of the present invention is shown;

[0034] Figure 12 A schematic diagram of an expansion device according to an embodiment of the present invention is shown.

[0035] Reference Signs List

[0036] 1. Protective installation part; 101. Install the plug-in cylinder; 1011. Tighten the thread; 102. Rotate the installation frame; 103. Rotate the threaded rod; 2. Telescopic positioning part; 201. Telescopic sliding column; 202. Wire reverse axis; 203. Install the threaded cylinder; 3. Docking clamping device; 301. Clamp the drive cylinder; 302. Clamp the fitting rubber ring; 4. Support member; 401. Support the rotating rod; 402. Rotate the gear; 5. Drive device; 501. Active rack plate; 5011. Active pull rope; 502. Driven rack plate; 5021. Linkage pull rope; 503. Reset spring; 6. Drainage device; 601. Drainage box; 6011. Drainage hole; 602. Drainage tube; 7. Expansion device; 701. Expansion mounting ring; 702. Expansion airbag; 703. Inflatable tube. DETAILED DESCRIPTION

[0037] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0038] Example: Please refer to Figures 1 to 12 :

[0039] The present invention proposes a minimally invasive obstructive pulmonary disease device for thoracic surgery, comprising a protective mounting part 1: a telescopic positioning part 2 is installed on the protective mounting part 1; a docking clamping device 3 is threadedly connected to the protective mounting part 1; two support members 4 are rotatably connected to the telescopic positioning part 2, and the two telescopic positioning parts 2 are installed oppositely; a driving device 5 is slidably connected to the protective mounting part 1; a drainage device 6 is fixedly sleeved on the protective mounting part 1; an expansion device 7 is sleeved on the drainage device 6; the protective mounting part 1 comprises: an installation plug-in cylinder 101, a tightening thread 1011 and a rotating mounting frame 102, a hexagonal hole is opened inside the installation plug-in cylinder 101; a tightening thread 1011 is provided on the installation plug-in cylinder 101; and a rotating mounting frame 102 is fixedly connected inside the installation plug-in cylinder 101.

[0040] Furthermore, according to an embodiment of the present invention, Figures 5 to 7As shown, the protective mounting part 1 also includes: a rotating threaded rod 103, which is provided with a handle; the rotating threaded rod 103 is rotatably connected to the rotating mounting frame 102; the telescopic positioning part 2 includes: a telescopic sliding column 201, a wire reverse shaft 202 and an installation threaded cylinder 203, the telescopic sliding column 201 is a hexagonal column structure; the telescopic sliding column 201 is slidably connected to the installation plug-in cylinder 101; the telescopic sliding column 201 is fixedly connected to the wire reverse shaft 202; the telescopic sliding column 201 is fixedly connected to the installation threaded cylinder 203, and the installation threaded cylinder 203 is threadedly connected to the rotating threaded rod 103; the docking clamping device 3 includes: a clamping drive cylinder 301 and a clamping fitting rubber ring 302, the clamping drive cylinder 301 is threadedly connected to the tightening thread 1011; the clamping drive cylinder 301 is fixedly connected to the clamping fitting rubber ring 302, through The setting of the docking clamping device 3 can make it easier to clamp the minimally invasive incision quickly, improve the overall stability, avoid the sliding of the installation insertion tube 101, and play a limiting role. By setting the telescopic positioning part 2, the overall flexibility of the use of the device can be effectively improved, and the adaptability is stronger. The telescopic depth can be freely adjusted. At the same time, the overall structure is compact, which can be more convenient to insert into the minimally invasive opening to avoid secondary damage. By simply rotating the rotating threaded rod 103, the telescopic sliding column 201 can be driven to slide on the installation threaded tube 203. The overall design is simple and practical, and can have better adaptability. At the same time, the clamping drive tube 301 can be rotated to drive the clamping fitting rubber ring 302 to press the expansion airbag 702 to achieve skin clamping. At the same time, another important function is that the clamping fitting rubber ring 302 can ensure the skin fitting effect to avoid bleeding, which is more practical.

[0041] Furthermore, according to an embodiment of the present invention, Figures 8 to 10As shown, the support member 4 includes: a supporting rotating rod 401 and a rotating gear 402. There are two supporting rotating rods 401, and the two supporting rotating rods 401 are connected to the bottom of the telescopic sliding column 201 in an oppositely staggered manner; the two supporting rotating rods 401 are respectively fixedly connected to the rotating gear 402; the driving device 5 includes: an active rack plate 501, an active pull rope 5011, a driven rack plate 502 and a linkage pull rope 5021, and the rotating gear 402 is slidably connected to the inside of the telescopic sliding column 201; the active rack plate 501 is engaged with the rotating gear 402 on the same side ... The upper portion is fixedly connected to an active pull rope 5011; the driven rack plate 502 is slidably connected to the telescopic sliding column 201; the driven rack plate 502 is meshed with another rotating gear 402 on the same side; a linkage pull rope 5021 is fixedly connected to the driven rack plate 502, and the linkage pull rope 5021 passes through the wire reverse shaft 202; the other end of the linkage pull rope 5021 is fixedly connected to the active rack plate 501; the driving device 5 also includes: a reset tension spring 503, which is provided with four reset tension springs 503, and the four reset tension springs 503 are grouped in pairs, and the two groups of reset tension springs 503 are respectively fixedly connected to the active rack plate 501. The movable rack plate 501 and the driven rack plate 502; the other ends of the two sets of reset springs 503 are respectively connected to the two sides of the telescopic sliding column 201. By setting the driving device 5, the two support members 4 can be driven to rotate and expand outward in both directions at the same time, which is more practical, can effectively improve the obstructive lung effect, and can effectively avoid the problem that unilateral obstructive lung is still inconvenient for surgical operation. The overall structure is more practical. At the same time, the driving device 5 is simpler to use and can be achieved by a simple pull line. The structure is compact and clever, and the reset spring 503 can assist automatic After reset, the opening size of the two supporting rotating rods 401 can be controlled more accurately. When the active pull rope 5011 is pulled, the active rack plate 501 is driven to slide inward, and the linkage pull rope 5021 is pulled at the same time. The linkage pull rope 5021 is bypassed on the reverse shaft 202 of the wire, so that the linkage pull rope 5021 can pull the driven rack plate 502 to slide inward at the same time. At this time, the active rack plate 501 and the driven rack plate 502 can achieve rapid opposite sliding, driving the two rotating gears 402 to expand and rotate outward at the same time. The overall structure is more practical, simple and convenient to operate, and more practical.

[0042] Furthermore, according to an embodiment of the present invention, Figure 11 and Figure 12As shown, the drainage device 6 includes: a drainage box 601, a drainage hole 6011 and a drainage tube 602. The drainage box 601 is provided with a drainage hole 6011; the drainage box 601 is fixedly mounted on the mounting cartridge 101; the drainage tube 602 is connected to the drainage box 601; the expansion device 7 includes: an expansion mounting ring 701 and an expansion airbag 702. The expansion mounting ring 701 is fixedly connected to the drainage box 601; the expansion airbag 702 is fixedly mounted on the expansion mounting ring 701; the expansion device 7 also includes: an inflation tube 703, the inflation tube 703 passes through the expansion mounting ring 701, the drainage box 601 and the mounting cartridge 101; the inflation tube 703 is connected to the inflation airbag 702. A valve is provided at the end of the inflation tube 703. By setting up an expansion device 7, auxiliary gas expansion positioning can be achieved, so that the device can be stably placed in the body to avoid accidental slipping out, and can effectively avoid damage to internal organs caused by unstable equipment. The overall use is safer. In conjunction with the provided drainage device 6, blood drainage can be achieved to avoid blood congestion and inability to be discharged, affecting surgery. At the same time, it also avoids bacterial infection caused by direct placement outside the body without a drainage device. The overall sanitary effect is better, and the use is simpler and more stable. If there is blood, it will flow into the drainage tube 602 through the drainage hole 6011 and then be discharged to achieve blood diversion. The overall structure is simple and stable, safer to use, and has higher hygiene standards.

[0043] The specific usage and function of this embodiment: In the present invention, first, a minimally invasive incision is generally made under the patient's armpit, or it can be determined according to the actual situation. The device is placed in the minimally invasive incision, and the expansion airbag 702 is inflated through the inflation tube 703. Then, after the expansion mounting ring 701 is inflated, the valve on the inflation tube 703 is closed. At this time, if there is blood, it will flow into the drainage tube 602 through the drainage hole 6011 and then be discharged to achieve blood diversion. By rotating the threaded rod 103, the installation threaded cylinder 203 can be driven to drive the telescopic sliding column 201 to slide on the installation threaded cylinder 203. The clamping driving cylinder 301 is rotated to drive the clamping fitting rubber ring 302 to press the expansion airbag 702 to clamp the skin. When the lungs are blocked, the active pull rope 50 is pulled. When the driving rack plate 501 is inwardly slid, the linkage rope 5021 can be pulled at the same time, and the linkage rope 5021 is passed around the reverse shaft 202 of the wire, so that the linkage rope 5021 can pull the driven rack plate 502 inwardly at the same time. At this time, the active rack plate 501 and the driven rack plate 502 can achieve rapid opposite sliding. When the active rack plate 501 and the driven rack plate 502 slide inwardly, the two rotating gears 402 are engaged and driven, and the two rotating gears 402 are driven to expand and rotate outward at the same time. When the active rope 5011 is released, the active rack plate 501 and the driven rack plate 502 can be driven to reset under the pull of the four reset springs 503.

[0044] Finally, it should be noted that when describing the positions of various components and the matching relationships between them, the present invention usually takes one / a pair of components as an example. However, those skilled in the art should understand that such positions, matching relationships, etc. are also applicable to other components / other pairs of components.

[0045] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. Based on the minimally invasive pulmonary obstructive surgery device for thoracic surgery, characterized in that: The invention comprises a protective mounting part (1): a telescopic positioning part (2) is mounted on the protective mounting part (1); a docking clamping device (3) is threadedly connected to the protective mounting part (1); two supporting members (4) are rotatably connected to the telescopic positioning part (2), and the two telescopic positioning parts (2) are mounted opposite to each other; a driving device (5) is slidably connected to the protective mounting part (1); a drainage device (6) is fixedly mounted on the protective mounting part (1); an expansion device (7) is mounted on the drainage device (6); the protective mounting part (1) comprises: a mounting plug-in cylinder (101), a tightening thread (1011) and a rotating mounting frame (102); a hexagonal hole is provided inside the mounting plug-in cylinder (101); a tightening thread (1011) is provided on the mounting plug-in cylinder (101); a rotating mounting frame (102) is fixedly connected inside the mounting plug-in cylinder (101); The telescopic positioning portion (2) comprises: a telescopic sliding column (201); the telescopic sliding column (201) is a hexagonal column structure; the telescopic sliding column (201) is slidably connected to the installation plug-in cylinder (101); The support member (4) comprises: a supporting rotating rod (401) and a rotating gear (402); two supporting rotating rods (401) are provided, and the two supporting rotating rods (401) are connected to the bottom of the telescopic sliding column (201) in an offset manner; the rotating gear (402) is fixedly connected to each of the two supporting rotating rods (401); The driving device (5) comprises: an active rack plate (501), an active pull rope (5011), a driven rack plate (502) and a linkage pull rope (5021); the rotating gear (402) is slidably connected to the inside of the telescopic sliding column (201); the active rack plate (501) is engaged with the rotating gear (402) on the same side; the active pull rope (5011) is fixedly connected to the active rack plate (501); the driven rack plate (502) is slidably connected to the telescopic sliding column (201); the driven rack plate (502) is engaged with another rotating gear (402) on the same side; the driven rack plate (502) is fixedly connected to the linkage pull rope (5021), and the linkage pull rope (5021) passes through the wire reverse shaft (202); the other end of the linkage pull rope (5021) is fixedly connected to the active rack plate (501); The driving device (5) further comprises: a reset spring (503), wherein four reset springs (503) are provided, and the four reset springs (503) form a group of two, and the two groups of reset springs (503) are respectively fixedly connected to the active rack plate (501) and the driven rack plate (502); the other ends of the two groups of reset springs (503) are respectively connected to the two sides inside the telescopic sliding column (201).

2. The minimally invasive pulmonary obstruction device for thoracic surgery according to claim 1, characterized in that: The protective mounting portion (1) further comprises: a rotating threaded rod (103), wherein the rotating threaded rod (103) is provided with a handle; and the rotating threaded rod (103) is rotatably connected to the rotating mounting frame (102).

3. The minimally invasive pulmonary obstruction device for thoracic surgery according to claim 2, characterized in that: The telescopic positioning portion (2) further comprises: a wire reversing shaft (202) and a mounting threaded barrel (203); the wire reversing shaft (202) is fixedly connected inside the telescopic sliding column (201); the mounting threaded barrel (203) is fixedly connected inside the telescopic sliding column (201), and a rotating threaded rod (103) is threadedly connected to the mounting threaded barrel (203).

4. The minimally invasive pulmonary obstruction device for thoracic surgery according to claim 1, characterized in that: The docking clamping device (3) comprises: a clamping drive cylinder (301) and a clamping and fitting rubber ring (302); the clamping drive cylinder (301) is threadedly connected to the tightening thread (1011); and the clamping and fitting rubber ring (302) is fixedly connected to the clamping drive cylinder (301).

5. The minimally invasive pulmonary obstruction device for thoracic surgery according to claim 3, characterized in that: The drainage device (6) comprises: a drainage box (601), a drainage hole (6011) and a drainage tube (602); the drainage box (601) is provided with a drainage hole (6011); the drainage box (601) is fixedly mounted on the mounting plug-in cylinder (101); and the drainage tube (602) is connected to the drainage box (601).

6. The minimally invasive pulmonary obstruction device for thoracic surgery according to claim 5, characterized in that: The expansion device (7) comprises: an expansion mounting ring (701) and an expansion airbag (702); the expansion mounting ring (701) is fixedly connected to the drainage box (601); and the expansion airbag (702) is fixedly mounted on the expansion mounting ring (701).

7. The minimally invasive pulmonary obstruction device for thoracic surgery according to claim 6, characterized in that: The expansion device (7) further comprises: an inflation tube (703), the inflation tube (703) passing through the expansion mounting ring (701), the drainage box (601) and the mounting insert (101); the inflation tube (703) is connected to the expansion airbag (702); and a valve is provided at the end of the inflation tube (703).

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