On-site first aid rapid hemostasis device and usage method
Through the design of the joint linkage device, combined with manual suction and titanium clamps, rapid hemostasis is achieved under single operation, solving the problem of effective control of heavy bleeding wounds in wartime, and improving the hemostasis efficiency of battlefield first aid.
Patent Information
- Application Number
- CN201911225918.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-12-04
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2039-12-04
AI Technical Summary
The existing hemostatic device is difficult to effectively control the wounds of heavy bleeding during wartime bleeding, especially at the junction, and the existing equipment cannot be operated alone, resulting in poor bleeding effect, especially when treatment conditions on the battlefield are limited.
A joint linkage device is designed, including a manual suction device, a disposable continuous titanium clamp and an LED lamp head, which can simultaneously perform blood accumulation and hemostasis operations on exposure, suction and clean the blood accumulation and hemostasis. Through the joint manual suction device and a split negative pressure suction bottle, rapid hemostasis is achieved.
It achieves rapid and effective hemostasis under single operation, and can expose the surgical field, absorb blood accumulation and close bleeding points at the same time, significantly improving the hemostasis effect of wartime first aid.
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Figure CN110811739B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an instrument for quickly stopping bleeding during on-site first aid and a method for using the same. Specifically, it relates to a quick hemostasis device suitable for on-site first aid and a method for using the same. The quick hemostasis device has the functions of lighting, suction, clamping, and hemostasis, and can be operated by a single operator to simultaneously expose the surgical field, aspirate blood accumulated in the surgical field, and stop bleeding. Background Art
[0002] Currently, the most common method for rapid hemostasis in first aid is compression, which is commonly used with tourniquets and pressure bandages. Tourniquets are widely used, but their tightness and duration are difficult to accurately control, especially during wartime, and can easily lead to limb ischemia and necrosis, resulting in disability. For severe bleeding at the base of a limb or the trunk, tourniquets are not effective, and pressure bandages are the only option. This is difficult to achieve independently and has poor results.
[0003] Especially for massive bleeding caused by rupture of large blood vessels in combat injuries, since the casualties appear suddenly on the battlefield, with the progress and advancement of tactics, the time left for treating the casualties is short, and the evacuation time is not fixed or often delayed; the space of the modern battlefield has expanded, the scope is not fixed, and the treatment institutions are scattered and constantly moving; there are relatively few medical personnel, and it is impossible to guarantee that they will accompany every combatant at all times. Most battlefield treatment still needs to be carried out by the combatants themselves or by medical staff.
[0004] However, due to the increasing power of modern weapons, the severity of hemorrhage has increased. The incidence of limb loss, closed hemorrhage in the thoracoabdominal cavity, and bleeding at the junction (neck, axilla, groin, etc.) has increased, resulting in fatal hemorrhage being the leading cause of death at battlefield wounds. Currently, there is a lack of effective control equipment for hemorrhage at the junction, and neither tourniquets nor pressure bandages can effectively control bleeding at these locations. Moreover, the bleeding at these locations is closer to the proximal end of the blood vessels, which have a thicker diameter, resulting in more and more rapid bleeding. Therefore, it is very important to develop equipment and devices that can effectively control bleeding at these locations.
[0005] Therefore, it is urgent to study a hemostatic device that is simple, effective, fast, can be operated by one person, and has the lowest possibility of disability. It is especially important for wartime hemostatic devices. Summary of the Invention
[0006] The present invention is made to solve the above technical problems, and its purpose is to provide a rapid hemostasis device and its use method suitable for on-site emergency treatment, especially battlefield first aid, which can simultaneously expose the surgical field, clean the accumulated blood in the surgical field and stop bleeding.
[0007] The inventors of this invention have conducted in-depth research on the manual aspirator, disposable continuous-action titanium clamp, LED lamp, and titanium clamp within the hemostatic device, resulting in a combined, linked mechanism that simultaneously exposes the surgical field, aspirates accumulated blood, and stops bleeding. This device can be used in conjunction with a split-type negative pressure suction bottle to achieve effective suction and fully expose bleeding points.
[0008] The present invention's on-site first aid hemostasis device comprises a combined manual aspirator, nested within a disposable, continuous-firing titanium clamp and equipped with a battery-replaceable LED lamp. A titanium clip is attached to the distal end, enabling the rapid firing of multiple titanium clips. The combined manual aspirator has a suction tube interface that, if necessary, can be connected to a separate negative pressure suction bottle, which has a flow controllable switch. The disposable continuous-firing titanium clamp, housing the LED lamp, extends in the same direction as the combined manual aspirator's suction tube and titanium clip. When a bleeding point is exposed, turning on a safety switch triggers the titanium clip to clamp the bleeding point, completing the hemostasis operation.
[0009] The clamp and the suction tube can be packaged in a split type, or can be connected when needed, such as by means of a slot.
[0010] In the on-site first-aid hemostasis device of the present invention, the drawn blood can be drawn into the aspirator through manual operation of the combined clamp handle and the aspirator, and can be drawn into a negative pressure suction bottle (with a controllable flow switch) as needed. When treating bleeding, first turn on the LED light, turn off the safety switch of the titanium clamp, use the top of the titanium clamp to find the bleeding point, squeeze the manual aspirator to achieve the effect of sucking out the blood accumulated in the surgical field and fully exposing the bleeding point, then turn on the safety switch of the titanium clamp, clamp the bleeding point, and complete the hemostasis effect. Therefore, the present invention can simultaneously perform the operations of exposing the surgical field, sucking out the blood accumulated in the surgical field, and hemostasis, and is very convenient to use. It can be operated by a single operator, making hemostasis more convenient.
[0011] According to the present invention, there is provided a hemostatic device, comprising: a clamp having a clamp body and two clamp handles, at least one hemostatic clip being capable of being mounted at the distal end of the body, and characterized in that it further comprises: an aspirator attached to the clamp, the aspirator comprising a container capable of being squeezed and deformed and a suction tube; the suction tube being capable of extending longitudinally along the body and being fixed at the distal end of the body, the container being attached to the clamp handles via a connecting device, so that the container can contract and recover with the closing and opening actions between the two clamp handles, so as to form a suction force at the distal end of the suction tube.
[0012] Preferably, the device further comprises: a lighting lamp attached to the clamp. The clamp is preferably a disposable continuous-fire titanium clamp, and the hemostatic clamp is a titanium clamp.
[0013] Preferably, the suction tube is connected to the container, and a first branch tube and a second branch tube are provided in the middle of the suction tube, and the second branch tube can be communicated with a split negative pressure suction bottle.
[0014] Preferably, the container is provided with a first one-way valve, and a second one-way valve is provided on the distal end side of the container or the first branch tube.
[0015] Preferably, the container is clamped between the clamp handles in an initial internal pressure state under normal pressure.
[0016] Preferably, the container is clamped between the clamp handles in an initial internal pressure state of negative pressure.
[0017] The container is further provided with a switch valve, so that the container is connected to the first branch pipe after the switch valve is opened.
[0018] Preferably, the container is squeezed and contracted by the two clamp handles as the two clamp handles are closed, so that the gas and / or blood in the container can be discharged to the outside through the first one-way valve;
[0019] The container is stretched and restored by the two clamp handles as the two clamp handles open, so that negative pressure is formed inside the container and the container is connected to the first branch pipe via the second one-way valve.
[0020] Preferably, the container is an elastic balloon or a bellows. Preferably, the clamp handle has a clamp handle actuating portion that is oppositely concave or oppositely concave to actuate the container and squeeze the container to deform.
[0021] Preferably, a manual pump is provided in place of the container, which can be stretched and compressed as the two clamp handles are opened and closed.
[0022] It also includes a blood collection part, which is connected to the suction tube and the manual pump respectively, so as to enhance the negative pressure in the blood collection part through the manual pump.
[0023] Preferably, the accumulated blood collection part can also be connected to a split negative pressure suction bottle.
[0024] According to the present invention, a method for using an on-site first aid hemostatic device is also provided, wherein any of the above-mentioned on-site first aid hemostatic devices is used, wherein the following steps 1) to 4) can be repeatedly performed:
[0025] 1) closing the safety switch device of the clamp;
[0026] 2) by closing and opening the two clamp handles so as to move them closer to and farther from each other, the container is squeezed to deform, shrink, and recover, thereby forming a suction force at the distal end of the suction tube;
[0027] 3) Open the safety switch device of the clamp to release the hemostatic clamp,
[0028] In this case, step 2) can be performed while the safety switch device of step 3) is open.
[0029] Preferably, when the clamp has an illumination light, the illumination light is turned on for illumination during step 3).
[0030] According to another aspect of the present invention, a first aid hemostasis method is provided as a treatment method, which uses any of the first aid hemostasis devices described above, wherein the following steps 1') to 4') can be repeated:
[0031] 1') Ensure that the safety switch device of the clamp is closed;
[0032] 2') moving the distal end of the clamp equipped with the hemostatic clip into the surgical field;
[0033] 3') by closing and opening the two clamp handles so as to move them closer to and farther from each other, squeezing the container to deform it and thereby shrink and restore it, thereby forming a suction force at the distal end of the suction tube;
[0034] 4') opening the safety switch device of the clamp and releasing the hemostatic clip,
[0035] Here, step 3') can be performed during step 4').
[0036] Preferably, when the clamp is provided with an illumination light, the illumination light is turned on before step 2') to illuminate the surgical field.
[0037] Effects of the Invention
[0038] The present invention's on-site emergency rapid hemostatic device simultaneously provides illumination, suction, clamping, and hemostasis, making it extremely convenient to use. A single operator can simultaneously expose the surgical field, aspirate blood, and stop bleeding, making hemostasis even more convenient. This makes it possible to simply and effectively utilize clamps and aspirators, which are often limited by their conditions, in on-site emergency situations, significantly improving treatment outcomes. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] Figure 1 FIG. 1 is a schematic diagram showing the structure of an on-site first aid hemostasis device according to an embodiment of the present invention.
[0040] Figure 2 Schematic diagram showing a disposable continuous-fire titanium clamp to which the present invention is applicable.
[0041] Figure 32 is a schematic diagram showing a conjoined manual aspirator according to an embodiment of the present invention.
[0042] Figure 4 2 is a schematic diagram showing a conjoined manual aspirator according to another embodiment of the present invention.
[0043] Figure 5 It is a schematic diagram showing a clamp in still another embodiment of the present invention.
[0044] Description of Reference Numerals
[0045] 100: On-site first aid hemostasis device; 1: Combined manual suction device; 2: Disposable continuous titanium clamp; 3: LED light; 4: Titanium clamp; 5: Split negative pressure suction bottle; 6: Body; 7: Clamp handle; 11: Suction tube; 12: Container; 12': Manual pump; 13: First branch tube; 14: Tube port; 15: First one-way valve; 16: Second branch tube; 17: Second one-way valve; 18: Collection part; 19: Clamp handle actuator. DETAILED DESCRIPTION
[0046] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. The embodiments described below are merely illustrative in all aspects and are not intended to limit the present invention. The present invention is not limited to the following embodiments.
[0047] In the drawings, identical or corresponding parts are denoted by the same reference numerals, and their descriptions are omitted as appropriate. To facilitate understanding, the following figures may show simplified or schematic structures, or may omit some components. The dimensional ratios between components shown in the figures do not necessarily represent actual dimensional ratios.
[0048] For ease of explanation, the end of each component closer to the operator during operation is called the proximal end, and the end away from the operator (the end opposite to the proximal end) is called the distal end. In addition, the longitudinal direction of the clamp 2 is called the longitudinal direction, and the approximately orthogonal direction is called the transverse direction.
[0049] Example 1
[0050] like Figure 1 As shown, the on-site first aid hemostasis device 100 of the present invention includes a clamp 2 and a combined manual suction device 1 connected to (eg, nested in) the clamp 2 .
[0051] The clamp 2 comprises a handle 7 and a body 6. Figure 1 、 2As shown, a hemostatic clip, such as a titanium clip 4, can be mounted at the distal end of the body 6. This can be a single clip or multiple clips, preferably 2-6 clips, preferably 6-10 clips, or preferably more than 10 clips, forming a so-called disposable continuous-fire titanium clip. The clamp is also equipped with a safety switch. When the safety switch is locked, at least one of the handles 7 can still be manually opened and closed, causing the space between the two handles 7 to increase or decrease accordingly.
[0052] A lighting lamp 3, such as an LED lamp, is provided inside or outside the body 6 to provide lighting. The power source is a replaceable battery and the lamp is provided with a switch at the proximal end. The lighting lamp 3 is preferably built into the distal end of the body 6 to illuminate the surgical field.
[0053] like Figure 1 、 3 As shown, the suction device 1 comprises a collection elastic container 12 that can be squeezed and deformed, and a suction tube 11 connected to the container 12. The container 12, with a substantially corresponding shape, is clamped in the space between the two clamp handles 7. The suction tube 11 extends from the container 12 along the body 6 until the tube port 14 reaches the titanium clamp 4 at the distal end, thereby aspirating blood from the surgical field.
[0054] The suction tube 11 is preferably a hard material tube, which is attached to the body 6 by a suitable attachment portion. Attachment portions for connecting to each other are also provided on the container 12 and / or the two clamp handles 7, such as clips, plugs, buckles, clasps, ropes, magnets, tongues and grooves, etc.
[0055] like Figure 3 As shown, the middle part of the suction tube 11 can be designed into an inverted V shape, the right branch tube 13 of the V shape is connected to the container 12, and the end interface of the left branch tube 16 is threaded and can be connected to a split negative pressure suction bottle 5 which is preferably provided with a flow controllable switch to ensure the suction capacity of blood when the amount of bleeding is large and keep the surgical field clear.
[0056] The container 12 may be an elastic balloon or bellows made of rubber plastic or the like. When squeezed and deformed, the container 12 contracts and stretches in a direction substantially transverse to the extension direction of the two clamp handles 7 .
[0057] A one-way valve 15 is formed at the proximal end of the container 12. A one-way valve 17 is formed at the distal end of the container 12, or at the right branch tube 13 of the suction tube 11.
[0058] When the container 12 contracts under pressure, the gas inside (and any blood accumulated during subsequent operations) is discharged to the outside through the one-way valve 15. When the container 12 recovers due to elasticity or stretching (including extension during continuous operation), or when negative pressure is formed inside due to pre-vacuuming before shipment, blood accumulated in the surgical field is directed into the container 12 through the one-way valve 17.
[0059] The compression and stretching (and corresponding contraction and recovery) of the container 12 are achieved through the squeezing and stretching of the two handles 7 attached to its exterior sides. In other words, the opening and closing of the two handles 7 act as pressure-regulating actuators for the container 12. More specifically, the handle actuators 19 at the proximal ends of the handles 7 can be moved closer or further apart to apply pressure and stretch to the lateral sides of the container 12.
[0060] Figure 1 The diagram shows a situation where the container 12 is clamped between the clamp handles 7 in an initial state of normal pressure.
[0061] Furthermore, this also applies to situations where the container 12 is placed between the clamp handles 7 in an initial, pre-factory, contracted state (not shown), such as after vacuum evacuation. In this case, a switch valve can be provided at the connection between the container 12 and the suction tube 11. Once the switch valve is opened, blood accumulation in the surgical field can be aspirated using the preset negative pressure. The clamp handles 7 can then be opened and closed continuously, as in the previous example. Alternatively, the container 12 can be reconnected to the clamp handles 7 after restoration.
[0062] In this way, under the lighting condition of the LED lamp head, the manual suction device 1 connected to the clamp handle 7 can be used to suck out the blood in the surgical field to make the surgical field clean. The titanium clamp 4 can also be used to help expose the surgical field to facilitate rapid positioning and clamping of the blood vessel segment that has shrunk due to rupture.
[0063] Therefore, the on-site first aid hemostasis device 100 of the present invention can simultaneously perform the operations of exposing the surgical field, absorbing the accumulated blood in the surgical field, and stopping bleeding, making hemostasis more convenient.
[0064] The following describes the operation of the first-aid hemostasis device 100 of the present invention. To use it, first attach and secure the combined manual aspirator 1 to the disposable continuous titanium clamp 2. Ensure the safety switch of the disposable continuous titanium clamp 2 is off. Turn on the power switch of the LED light 3. The titanium clamp 4 located at the farthest end can then be used to enter the wound, exposing the surgical field for illumination. If bleeding from the surgical field requires suction, suction is performed by utilizing the preset negative pressure within the container 12, and further, or directly, by squeezing the two handles 7 at the proximal end of the disposable continuous titanium clamp 2 to utilize the negative pressure generated within the container 12. If the amount of bleeding is excessive, a separate negative pressure suction bottle 5 can be connected to ensure complete suction of the bleeding point, thus maintaining a clear surgical field and locating the bleeding point. At this point, the safety switch of the disposable continuous titanium clamp 2 can be opened, and the hemostatic clip (multiple clips can be used) can be deployed to clamp the blood vessel, achieving complete hemostasis. That is, after activating one titanium clip 4, the necessary steps can be repeated to activate the next titanium clip 4 at the desired location. Thus, when the safety switch is closed, the forceps handle 7 can be operated to actuate the container 12 using the forceps handle actuating portion 19 for suction; when the safety switch is subsequently opened, the titanium clamp 4 can be activated, and at this time, the forceps handle 7 can also be operated to actuate the container 12 for possible suction; and the safety switch can be closed again, and the process can be repeated. Therefore, hemostasis becomes more convenient for the surgeon, and the surgeon can complete the hemostasis operation alone.
[0065] Example 2
[0066] This embodiment is a variation of the first embodiment. The same symbols are used for the parts common to the first embodiment and their descriptions are omitted. The main difference lies in the suction and discharge path of the accumulated blood. Figure 4 In the schematic diagram, the Figure 1 The clamp 2 and the lighting lamp 3 are included.
[0067] The connecting tube at the distal end of the manual pump 12' can be equipped with a one-way valve, anti-overflow valve, or anti-overflow diaphragm to prevent blood from flowing into the manual pump 12'. The two clamp handles 7 squeeze and stretch the manual pump 12' laterally, creating negative pressure within the collection section 18 and the suction tube 11, allowing accumulated blood to be directly discharged into the collection section 18. Furthermore, a separate negative pressure suction bottle 5 can also be connected to the collection section 18.
[0068] In this way, the above-mentioned hemostatic effect can also be achieved.
[0069] Example 3
[0070] In the above embodiment 1 Figure 1 、 2In the embodiment, the handle actuating portions 19 move laterally away from each other as they move longitudinally toward the tail of the handle 7, or move closer to each other and then away again (corresponding to an oppositely concave shape). This forms a convex top acting area on the container 12 between the two handle actuating portions 19, which is particularly suitable for situations where the container 12 is composed of a balloon or the like.
[0071] In contrast, Figure 5 Schematic diagram showing a clamp in another embodiment of the present invention. Figure 1 、 2 The main difference is that the configuration of the pliers handle actuating portion 19 is generally opposite.
[0072] Considering the case where the container 12 is composed of a bellows or the like, it may also be Figure 5 As shown, the pliers handle actuating portions 19 are formed to approach each other in the transverse direction as they go toward the tail of the pliers handle 7 in the longitudinal direction, or to move away from each other and then approach each other (corresponding to a mutually concave shape).
[0073] As a modification, a section of pipe may be provided at the distal end of the body 6 in parallel with the moving channel for the titanium nail or titanium clip 4 (e.g., sleeved), and a connecting pipe portion may be formed at the proximal end of the pipe for the suction tube 11 to be connected and fixed.
[0074] Those skilled in the art will understand that the container 12 and the hand pump 12' are attached to one clamp handle 7 via a connection portion on one side and can also be provided as a free end on the other side. Other temporary connections between the suction tube 11, the container 12, the hand pump 12' and the clamp 2 are also within the scope of the present invention.
[0075] As the above-mentioned attachment part, as long as it can play the role of maintaining the LED lamp 3, the suction tube 11 of the suction device 1 and even the container 12 and the manual pump 12' at one or more different axial positions in the longitudinal direction of the clamp 2, it can be any appropriate connection device or method, such as a snap or clip connection, a plastic sleeve, a hook and groove, a rib and groove, etc., to form a shape-locking (fitting) connection.
[0076] Figure 1 5. The example in which the suction tube 11 is externally provided on the body 6 is shown for the convenience of field operation, but the invention is not limited thereto and the suction tube 11 may also pass through the inner channel of the body 6. Figure 2 An example is shown in which the handle 7 and the body 6 extend together in the longitudinal direction, but the two may extend substantially orthogonally to each other.
[0077] The on-site first-aid rapid hemostatic device of the present invention simultaneously provides illumination, suction, clamping, and hemostasis. Therefore, it is very convenient to use. A single operator can simultaneously expose the surgical field, aspirate blood, and stop bleeding, making hemostasis even more convenient. Of course, as a disposable device, it is also suitable for in-office surgery.
Claims
1. A first aid hemostatic device, comprising: The clamp comprises a body and two clamp handles, at least one hemostatic clip can be installed at the distal end of the body, and is characterized in that it also includes: an aspirator attached to the clamp, The suction device comprises a container and a suction tube capable of being squeezed and deformed; The suction tube can extend along the longitudinal direction of the body and be fixed to the distal end of the body. The container is attached to the clamp handle via a connecting device, so that the container can shrink and recover as the two clamp handles close and open, so as to form a suction force at the distal end of the suction tube. A first branch tube is provided in the middle of the suction tube. The container is provided with a first one-way valve, and a second one-way valve is provided on the distal end of the container or the first branch pipe. The container is clamped between the clamp handles in an initial internal pressure state under normal pressure; or The container is clamped between the clamp handles in an initial internal pressure state of negative pressure. The container is further provided with a switch valve, so that the container is connected to the first branch pipe after the switch valve is opened. The container is squeezed and contracted by the two clamp handles as the two clamp handles close, so that the gas and / or blood in the container can be discharged to the outside through the first one-way valve; The container is stretched and restored by the two clamp handles as the two clamp handles open, so that negative pressure is formed inside the container and the container is connected to the first branch pipe via the second one-way valve.
2. The on-site first aid hemostasis device according to claim 1, wherein: Also included: a lighting lamp attached to the clamp, and / or The clamp is a disposable continuous titanium clamp, and the hemostatic clip is a titanium clip.
3. The on-site first aid hemostasis device according to claim 1, wherein: The suction tube is connected to the container, and a second branch tube is provided in the middle of the suction tube. The second branch tube can be communicated with a split negative pressure suction bottle.
4. The on-site first aid hemostasis device according to claim 1 or 2, wherein: The container is an elastic balloon body or a bellows body, and the clamp handle has a clamp handle actuating portion in an opposite outward concave shape or an opposite inward concave shape to actuate the container.
5. An on-site first aid hemostasis device, comprising: The clamp comprises a body and two clamp handles, at least one hemostatic clip can be installed at the distal end of the body, and is characterized in that it also includes: an aspirator attached to the clamp, The suction device comprises a manual pump and a suction tube that can be squeezed and deformed; The suction tube can extend along the longitudinal direction of the body and be fixed to the distal end of the body. The manual pump is attached to the clamp handle via a connecting device, so that the manual pump can be contracted and restored as the two clamp handles are closed and opened, so as to form a suction force at the distal end of the suction tube. A first branch tube is provided in the middle of the suction tube. The manual pump is provided with a first one-way valve, and a second one-way valve is provided at the distal end of the manual pump or the first branch pipe. The manual pump is clamped between the clamp handles in an initial internal pressure state under normal pressure; or The manual pump is placed between the clamp handles in an initial internal pressure state of negative pressure. The manual pump is further provided with a switch valve, so that the manual pump is connected to the first branch pipe after the switch valve is opened. The manual pump is squeezed and contracted by the two pliers handles as the two pliers handles close, so that the gas in the manual pump can be discharged to the outside through the first one-way valve; The manual pump is stretched and restored by the two clamp handles as the two clamp handles open, so that negative pressure is formed inside the manual pump and communicates with the first branch pipe through the second one-way valve. It also includes a blood collection part, which is connected to the suction tube and the manual pump respectively, so as to enhance the negative pressure in the blood collection part through the manual pump. The accumulated blood collection part can be communicated with a split type negative pressure suction bottle.
6. The on-site first aid hemostasis device according to claim 5, wherein: Also included: a lighting lamp attached to the clamp, and / or The clamp is a disposable continuous titanium clamp, and the hemostatic clip is a titanium clip.
7. The on-site first aid hemostasis device according to claim 5 or 6, wherein: The manual pump is an elastic balloon body or a bellows body, and the clamp handle has a clamp handle actuating portion in an oppositely concave shape or an oppositely concave shape to actuate the manual pump.
Citation Information
Patent Citations
Rapid hemostatic device for on-site emergency treatment
CN212037636U