WO2011072415A1 - Bone marrow liquid-injecting gun - Google Patents

Abstract

A bone marrow liquid-injecting gun comprises a gun body, a propulsion system and an ejection system. The ejection system comprises four parts: an inner needle (8), an outer needle (4), a needle fixing device (6) and a chuck (7). The outer needle (4) is hollow, and the inner needle (8) is solid and is set in the hollow cavity of the outer needle, therefore the two needles constitute a trocar. After the front end of the trocar has been driven into the bone marrow cavity, the inner needle is taken out, then the outer needle becomes a passage for diagnosis and treatment.

Description

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 Description book bone marrow injection gun

Technical field

 The invention relates to a medical device, which is an bone marrow injection gun which is suitable for emergency rescue of an infusion channel suitable for field conditions (including earthquakes, fires, traffic accidents and the like and various natural disasters).

Background of the invention

 At present, most of the clinical emergency procedures, especially for the rescue of critically ill patients, establish intravenous infusion channels, timely administration can win valuable time for rescue. However, some critically ill patients cannot quickly and effectively establish venous passage due to dehydration, shock, massive bleeding, etc., losing the optimal timing of delivery and failure to rescue. In this case, by establishing a medullary canal in a very short time, ensuring timely delivery of medications and fluids is the key to rescue.

 The principle of establishing the medullary canal channel is to use the vascular network rich in the medullary cavity, which communicates with the blood circulation through the capillary network. Therefore, the drugs and liquids input into the medullary cavity can enter the blood circulation quickly and effectively. The channel is quickly established in a very short period of time, and any drug that can be used intravenously can be used in the medullary cavity, including blood transfusion. Therefore, it is especially suitable for the rescue site, which can greatly improve the success rate of rescue. Summary of the invention

 The function of the bone marrow injection gun of the invention is: in a short period of time, safely and reliably establish a passage for the external bone marrow to the internal bone marrow cavity, thereby achieving the purpose of establishing an infusion channel and infusion of a first aid medicine.

To achieve the above objects, the present invention includes a gun body, a propulsion system, and an ejection system. The gun body consists of four parts: the pusher, the positioning sleeve, the trigger and the firing device, and the handle. The positioning sleeve and the pusher are connected by a rotating thread to achieve accurate positioning of the penetration depth. The firing device consists of a pawl, a leaf spring, and a pin. The trigger cooperates with the firing device to complete the locking, driving, and unlocking actions, so that the propulsion system provides enough Description

The force puts the trocar into the inside of the marrow cavity. The propulsion system consists of a pull rod, a lever handle, a positioning card shooter, a limit card shooter, and a propulsion spring. The positioning card and the limit card shoots constitute a safety device to ensure safe operation. The ejection system consists of four parts: the inner needle, the outer needle, the needle fixing device and the collet. The outer needle is a hollow structure, and the inner needle is a solid body located in the cavity of the outer needle. The trocar consisting of the inner needle and the outer needle is closely connected with the needle fixing device through the chuck, and the limit card shoot and the positioning sleeve control the depth of the trocar into the bone marrow cavity. The main component materials are mainly surface treated low carbon alloy steel. The invention can make the trocar composed of the inner needle and the outer needle enter the marrow cavity within a few seconds, and take out the inner needle, and the emergency needle can be used for emergency infusion, sampling and the like.

 In summary, the main advantages of the present invention are:

 (1) The present invention is very suitable for establishing an infusion channel for rescue under field conditions (including various accidents caused by earthquakes, fires, traffic accidents, and natural disasters), and is a general-purpose medical device for military and civilian use.

 (2) The invention can be repeatedly used repeatedly, which greatly reduces the original use cost of such medical devices, and has broad application prospects in clinical practice.

 (3) The invention is completely mechanical and does not have any energy requirements.

 (4) The present invention has a simple structure, is light in weight, is portable, can be operated by one hand, and can be left in the body for a long time, and meets medical requirements in a broad sense.

 (5) The invention is safe, convenient and fast to use. In an emergency, the puncture depth can be accurately positioned, administered to the patient in a very short period of time, for rescue or treatment purposes, and the wound is small and the risk of complications is low.

DRAWINGS

The invention will now be described in further detail with reference to the accompanying drawings. ,

 Description

 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front view showing the structure of the present invention.

 Figure 2 is a view of the firing device of the present invention.

 Figure 3 is a view of the needle positioning device of the present invention.

 Figure 4 is a diagram of the safety device of the present invention.

 In the figure 1. Advancement 2. Positioning sleeve 3. Leaf spring 4. Outer needle 5. Claw 6. Needle fixing device 7. Collet 8. Inner needle 9. Propulsion spring 10. Pin shaft 11. Trigger 12. Locating pin 13. Gun handle 14. Positioning card shooter 15. Pull rod 16. Limit position bamboo shoots 17. Pull rod handle 18. Fixing bolt

Specific implementation

 In the drawings, the invention includes a gun body, a propulsion system, and an ejection system. The gun body is composed of a pusher, a positioning sleeve, a trigger 11, a firing device, and a handle 13. The positioning sleeve 2 and the pusher 1 are connected by a rotating thread to achieve accurate positioning of the penetration depth. The firing device consists of a leaf spring 3, a claw 5, and a pin 10. The trigger 11 cooperates with the firing device to complete the locking, driving, and unlocking actions, so that the propulsion system provides sufficient force to inject the trocar into the medullary cavity. The propulsion system consists of a propulsion spring 9, a positioning card bamboo shooter 14, a drawbar 15, a limit card shooter 16, and a drawbar handle 17 in total. The positioning card bamboo shooter 14 and the limit card bamboo shoot 16 constitute an insurance device to ensure safe operation. The ejection system consists of 4 parts: outer needle 4, inner needle 8, needle positioning device 6, and chuck 7. The outer needle 4 is a hollow crust, and the inner needle 8 is a solid body located in the cavity of the outer needle. The trocar consisting of the inner needle 8 and the outer needle 4 is closely coupled with the needle positioning device 6 through the collet 7, and the trocar is controlled to enter the depth of the medullary cavity by the positioning sleeve 1 and the restriction rod 17 . The needle positioning device 6 is tightly coupled to the tie rod 15, and is clamped and fixed by a fixing bolt 18. The main component materials of the present invention are mainly surface treated low carbon alloy steels.

Before use, remove the positioning sleeve 2, select the required trocar, fix it with the needle positioning device 6 and the chuck 7, pull the lever handle 17, compress the push spring 9 to the predetermined position, and use the positioning card 14 and limit , ,

 Description

Position card shooter 16 Start the safety device. After finding the puncture site, the positioning sleeve 2 is aligned with the puncture site, and the trigger 11 is pulled to provide sufficient force to push the trocar into the marrow cavity. When the trocar composed of the inner needle 8 and the outer needle 4 enters the medullary cavity, the needle is stopped immediately, the inner needle 8 is separated from the outer needle 4, and the inner needle 8 is taken out, and the quick passage established by the outer needle 4 is realized. The present invention is capable of <Desc/Clms Page number>> Without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims and the maximum scope of the principles and features disclosed herein.

Claims

Claim 1. A bone marrow injection gun, comprising: a gun body, a propulsion system, and an ejection system. The gun body consists of a simple pusher, a positioning sleeve, a trigger and a firing device, and a handle. The propulsion system consists of a pull rod, a lever handle, a positioning card shooter, a limit card shooter, and a propulsion spring. The ejection system consists of an inner needle, an outer needle, an injection needle fixing device, and a collet. The outer needle is a hollow structure, and the inner needle is a solid body located in the cavity of the outer needle.  2. A bone marrow injection gun according to claim 1, characterized in that: the positioning sleeve and the pusher are connected by a rotary thread to achieve accurate positioning of the penetration depth.  3. A bone marrow injection gun according to claim 1, characterized in that: the positioning card and the limit card bamboo shoot constitute a safety device, and the locking state after the completion of the mechanical potential energy is realized to ensure safety. operating.  4. A bone marrow injection gun according to claim 1, characterized in that: the trocar consisting of an inner needle and an outer needle is closely engaged with the needle fixing device through the collet.  5. A bone marrow injection gun according to claim 1, wherein: the depth of the trocar into the medullary cavity is controlled by a limit card shoot and a positioning sleeve.  6. A bone marrow injection gun according to claim 1, wherein: said main component material is mainly low carbon alloy steel.