Indwelling needle catheter structure

Abstract

The present invention discloses an indwelling needle catheter structure, comprising a steel needle, a No. 1 catheter is arranged on the rear end outer surface of the steel needle, a catheter seat is arranged on the rear end outer surface of the No. 1 catheter, and a clamping hose is arranged on the rear end outer surface of the catheter seat. The indwelling needle catheter structure described in the present invention is provided with an opening and a buffer mechanism, and when the catheter is subjected to negative pressure conditions, because there is a hole on the circumference, the negative pressure on the catheter is converted from one direction to another direction, and the negative pressure in each direction is weakened. At the same time, due to the symmetrical distribution on the circumference and the force balance in the same direction, the catheter will not deviate significantly, thereby avoiding damage to the blood vessel wall, avoiding blood vessel congestion and liquid leakage, avoiding the hyperplasia of connective tissue caused by exuded liquid, and causing phlebitis. When the steel needle is disassembled, the shaking of the steel needle can be reduced, reducing the pain of the patient, and bringing better prospects for use.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to an indwelling needle catheter structure. Background Art

[0002] The core components of an indwelling needle include a soft catheter that can be retained in a blood vessel, and a stainless steel puncture guide needle. When in use, the catheter and the needle are punctured into the blood vessel together. When the catheter has completely entered the blood vessel, the needle is withdrawn, leaving only the soft catheter in the blood vessel for infusion or hemodialysis treatment. This facilitates clinical medication and rescue medication for emergency and critically ill patients, reduces the workload of nurses, and reduces the pain of children. Therefore, indwelling needles are widely used in clinical practice.

[0003] The existing indwelling needle catheter has certain disadvantages when in use. First, due to the large negative pressure on the end of the catheter, the end of the catheter may be deflected close to the blood vessel in the blood vessel, causing damage to the blood vessel wall, prone to vascular congestion and fluid leakage, and the exuded fluid leads to connective tissue hyperplasia and phlebitis, which has certain adverse effects. Secondly, when withdrawing the steel needle, it is easy to cause the steel needle to shake, causing injury to the patient's blood vessels, which has certain adverse effects and brings certain impacts to people's use process. For this reason, we propose an indwelling needle catheter structure. Summary of the invention

[0004] The main purpose of the present invention is to provide an indwelling needle catheter structure, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A catheter structure of an indwelling needle comprises a steel needle, a No. 1 catheter is arranged on the rear end outer surface of the steel needle, a catheter seat is arranged on the rear end outer surface of the No. 1 catheter, a clamping hose is arranged on the rear end outer surface of the catheter seat, a No. 1 connector is arranged on the rear end outer surface of the clamping hose, a rubber connector is arranged on the rear end outer surface of the No. 1 connector, a buffer mechanism is arranged on the middle outer surface of the rubber connector, a needle seat is arranged on the rear end outer surface of the rubber connector, and an exhaust joint is arranged on the rear end outer surface of the needle seat.

[0007] Catheter No. 1 is mainly used to transport fluid.

[0008] The needle seat mainly plays the role of fixing the steel needle.

[0009] Fasteners mainly play the role of fastening and fixing.

[0010] Preferably, the buffer mechanism includes a fixed shaft, a fastener, a movable frame, a buffer spring, an inclined rod and a flat plate, the front end outer surface of the buffer mechanism is provided with a fixed shaft, the lower end outer surface of the fixed shaft is provided with a fastener, the front end outer surface of the fixed shaft is provided with a movable frame, the upper end outer surface of the movable frame is provided with a buffer spring, the outer surfaces of both sides of the movable frame are provided with inclined rods, and the upper end outer surface of the inclined rods is provided with a flat plate.

[0011] Preferably, openings are arranged around the front end of the No. 1 catheter.

[0012] Preferably, a thread groove is provided between the fixed shaft and the fastener, and the inner surface of the lower end of the fixed shaft is detachably connected to the outer surface of the upper end of the fastener via the thread groove.

[0013] Preferably, a connecting groove is provided between the fixed shaft and the movable frame, and the middle inner surface of the fixed shaft is movably connected to the outer surface of one side of the movable frame through the connecting groove.

[0014] Preferably, an assembly shaft is provided between the No. 1 catheter and the catheter seat, and the rear end outer surface of the No. 1 catheter is detachably connected to the front end outer surface of the catheter seat via the assembly shaft.

[0015] Preferably, a mounting shaft is provided between the catheter seat and the clamping hose, and the rear end outer surface of the catheter seat is detachably connected to the front end outer surface of the clamping hose via the mounting shaft.

[0016] Preferably, a fastening groove is provided between the clamping hose and the No. 1 connector, and the front end inner surface of the No. 1 connector is detachably connected to the rear end outer surface of the clamping hose via the fastening groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the indwelling needle catheter structure, through the set openings, can convert the negative pressure on the catheter from one direction to five directions when the catheter is subjected to negative pressure conditions because there are four holes on the circumference, and the negative pressure in each direction is weakened. At the same time, due to the symmetrical distribution on the circumference and the balanced forces in the same direction, the catheter will not deviate greatly, thereby avoiding damage to the blood vessel wall, avoiding vascular congestion and liquid leakage, avoiding the exudation of liquid leading to connective tissue hyperplasia and phlebitis, which is beneficial for people to use. Through the provided buffer mechanism, when withdrawing the steel needle, the fastener on the fixed shaft can be loosened, thereby pulling the movable frame to the right, and then the flat plate drives the needle seat to be pulled to the right. The stability of the flat plate can be increased by the inclined rod on the flat plate, and the buffer spring on the flat plate can also play a buffering role, which can reduce the shaking of the steel needle and prevent the patient's meridians from being injured, playing a certain protective role, and is beneficial for people to use. The entire indwelling needle catheter structure is simple in structure, easy to operate, and has a better effect than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the overall structure of an indwelling needle catheter structure of the present invention.

[0019] Figure 2 A indwelling needle catheter structure of the present invention Figure 1 Schematic diagram of the structure of the middle buffer mechanism 9.

[0020] Figure 3 In a catheter structure of an indwelling needle of the present invention Figure 1 main view.

[0021] Figure 4 In a catheter structure of an indwelling needle of the present invention Figure 1 Top view of the .

[0022] Figure 5 In a catheter structure of an indwelling needle of the present invention Figure 1 Rear view of.

[0023] Figure 6 In a catheter structure of an indwelling needle of the present invention Figure 1 Bottom view of .

[0024] In the figure: 1, steel needle; 2, catheter No. 1; 3, catheter seat; 4, clamping hose; 5, connector No. 1; 6, rubber connector; 7, needle seat; 8, exhaust joint; 9, buffer mechanism; 91, fixed shaft; 92, fastener; 93, movable frame; 94, buffer spring; 95, inclined rod; 96, flat plate; 10, opening. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] like Figure 1-6 As shown, an indwelling needle catheter structure includes a steel needle 1, a No. 1 catheter 2 is arranged on the rear end outer surface of the steel needle 1, a catheter seat 3 is arranged on the rear end outer surface of the No. 1 catheter 2, a clamping hose 4 is arranged on the rear end outer surface of the catheter seat 3, a No. 1 connector 5 is arranged on the rear end outer surface of the clamping hose 4, a rubber connector 6 is arranged on the rear end outer surface of the No. 1 connector 5, a buffer mechanism 9 is arranged on the middle outer surface of the rubber connector 6, a needle seat 7 is arranged on the rear end outer surface of the rubber connector 6, and an exhaust joint 8 is arranged on the rear end outer surface of the needle seat 7.

[0027] Furthermore, a fixed shaft 91 is provided on the front end outer surface of the buffer mechanism 9, a fastener 92 is provided on the lower end outer surface of the fixed shaft 91, a movable frame 93 is provided on the front end outer surface of the fixed shaft 91, a buffer spring 94 is provided on the upper end outer surface of the movable frame 93, inclined rods 95 are provided on the outer surfaces of both sides of the movable frame 93, and a flat plate 96 is provided on the upper end outer surface of the inclined rod 95. When the steel needle 1 is withdrawn, the fastener 92 on the fixed shaft 91 can be loosened to pull the movable frame 93 to the right, and then the flat plate 96 drives the needle seat 7 to be pulled to the right. The stability of the flat plate 96 can be increased by the inclined rod 95 on the flat plate 96, and the buffer spring 94 on the flat plate 96 can also play a buffering role, which can reduce the shaking of the steel needle 1 and prevent the patient's meridians from being injured, playing a certain protective role, and is conducive to people's use.

[0028] Furthermore, openings 10 are arranged around the front end of the No. 1 catheter 2 to relieve pressure, avoid damage to the blood vessel wall, avoid vascular congestion and fluid leakage, avoid exuded fluid leading to connective tissue hyperplasia and phlebitis.

[0029] Furthermore, a thread groove is provided between the fixed shaft 91 and the fastener 92 , and the inner surface of the lower end of the fixed shaft 91 is detachably connected to the outer surface of the upper end of the fastener 92 through the thread groove, which can play a good fastening role.

[0030] Furthermore, a connecting groove is provided between the fixed shaft 91 and the movable frame 93 , and the middle inner surface of the fixed shaft 91 is movably connected to the outer surface of one side of the movable frame 93 through the connecting groove, so as to facilitate the adjustment of the movable frame 93 .

[0031] Furthermore, an assembly shaft is provided between the No. 1 catheter 2 and the catheter seat 3 , and the rear end outer surface of the No. 1 catheter 2 is detachably connected to the front end outer surface of the catheter seat 3 via the assembly shaft, so as to facilitate the assembly of the No. 1 catheter 2 .

[0032] Furthermore, a mounting shaft is provided between the catheter seat 3 and the clamping hose 4 , and the rear end outer surface of the catheter seat 3 is detachably connected to the front end outer surface of the clamping hose 4 via the mounting shaft.

[0033] Furthermore, a fastening groove is provided between the clamping hose 4 and the No. 1 connector 5 , and the front end inner surface of the No. 1 connector 5 is detachably connected to the rear end outer surface of the clamping hose 4 through the fastening groove.

[0034] The working principle and use process of the present invention are as follows: when in use, first insert the steel needle 1 and the No. 1 catheter 2 into the blood vessel. When the No. 1 catheter 2 completely enters the blood vessel, the steel needle 1 can be withdrawn through the needle seat 7. In order to prevent the steel needle 1 from shaking too much, the fastener 92 on the fixed shaft 91 can be loosened when the steel needle 1 is withdrawn, so that the movable frame 93 is pulled out to the right, and then the flat plate 96 drives the needle seat 7 to be pulled out to the right. The inclined rod 95 on the flat plate 96 can increase its stability, and the buffer spring 94 on the flat plate 96 can also play a buffering role, which can reduce the shaking of the steel needle 1 and prevent the patient's meridians from being injured, playing a certain protective role. Then the infusion tube is connected to the rubber connector 6 to facilitate the infusion. In order to prevent The end of catheter No. 1 2 is subjected to a relatively large pressure, which may cause the end of catheter No. 1 2 to deviate and approach the blood vessel in the blood vessel, causing damage to the blood vessel wall, and easily causing vascular congestion and fluid leakage. The exuded fluid causes connective tissue hyperplasia and phlebitis. When catheter No. 1 2 is subjected to negative pressure conditions, because there are four openings 10 on the circumference, the negative pressure on catheter No. 1 2 is converted from one direction to five directions, and the negative pressure in each direction is weakened. At the same time, because the openings 10 on the circumference are symmetrically distributed and the forces in the same direction are balanced, catheter No. 1 2 will not deviate significantly, thereby avoiding damage to the blood vessel wall, avoiding vascular congestion and fluid leakage, avoiding connective tissue hyperplasia caused by exuded fluid, and phlebitis, which is convenient for people to use.

[0035] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An indwelling needle catheter structure, comprising a steel needle (1), characterized in that: A No. 1 catheter (2) is arranged on the rear end outer surface of the steel needle (1), a catheter seat (3) is arranged on the rear end outer surface of the No. 1 catheter (2), a clamping hose (4) is arranged on the rear end outer surface of the catheter seat (3), a No. 1 connector (5) is arranged on the rear end outer surface of the clamping hose (4), a rubber connector (6) is arranged on the rear end outer surface of the No. 1 connector (5), a buffer mechanism (9) is arranged on the middle outer surface of the rubber connector (6), a needle seat (7) is arranged on the rear end outer surface of the rubber connector (6), and an exhaust joint (8) is arranged on the rear end outer surface of the needle seat (7); The buffer mechanism (9) comprises a fixed shaft (91), a fastener (92), a movable frame (93), a buffer spring (94), an inclined rod (95) and a flat plate (96); the fixed shaft (91) is arranged on the front end outer surface of the buffer mechanism (9); the fastener (92) is arranged on the lower end outer surface of the fixed shaft (91); the movable frame (93) is arranged on the front end outer surface of the fixed shaft (91); the buffer spring (94) is arranged on the upper end outer surface of the movable frame (93); the inclined rods (95) are arranged on both sides of the outer surface of the movable frame (93); and the flat plate (96) is arranged on the upper end outer surface of the inclined rod (95); The front end of the No. 1 catheter (2) is provided with openings (10) all around.

2. The indwelling needle catheter structure according to claim 1, characterized in that: A thread groove is provided between the fixed shaft (91) and the fastener (92), and the inner surface of the lower end of the fixed shaft (91) is detachably connected to the outer surface of the upper end of the fastener (92) via the thread groove.

3. The indwelling needle catheter structure according to claim 1, characterized in that: A connecting groove is provided between the fixed shaft (91) and the movable frame (93), and the inner surface of the middle portion of the fixed shaft (91) is movably connected to the outer surface of one side of the movable frame (93) through the connecting groove.

4. The indwelling needle catheter structure according to claim 1, characterized in that: An assembly shaft is provided between the No. 1 catheter (2) and the catheter seat (3), and the rear end outer surface of the No. 1 catheter (2) is detachably connected to the front end outer surface of the catheter seat (3) via the assembly shaft.

5. The indwelling needle catheter structure according to claim 1, characterized in that: A mounting shaft is provided between the catheter seat (3) and the clamping hose (4), and the rear end outer surface of the catheter seat (3) is detachably connected to the front end outer surface of the clamping hose (4) via the mounting shaft.

6. The indwelling needle catheter structure according to claim 1, characterized in that: A fastening groove is provided between the clamping hose (4) and the No. 1 connector (5), and the front end inner surface of the No. 1 connector (5) is detachably connected to the rear end outer surface of the clamping hose (4) via the fastening groove.

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