Safe medical trocar allowing releasing of withdrawing member
A trocar, safe technology, applied in the field of medical devices, can solve the problems of accidental injury and infection of patients, puncture of blood vessels, infection of operators, etc.
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Embodiment 1
[0189] medical trocar
[0190] Such as Figure 1-2 As shown, the withdrawable trocar of the present embodiment includes:
[0191] a catheter adapter 1;
[0192] An indwelling catheter 2, the indwelling catheter 2 is arranged at the front end of the catheter adapter 1;
[0193] a needle hub 3, said needle hub 3 is located inside said catheter hub 1; and
[0194] A puncture needle 4, one end of the puncture needle 4 is fixed to the needle base 3, and the puncture needle 4 and the needle base 3 are hollow structures communicating with each other.
[0195] Wherein, the trocar includes a puncture state and an indwelling state; in the puncture state, the puncture needle 4 is placed in the indwelling catheter 2 (such as figure 1 (a) shown); the trocar changes from the puncture state to the indwelling state by withdrawing the needle hub 3 . In the indwelling state, the puncture needle 4 is placed in the catheter adapter 1, wherein the needle tip of the puncture needle 4 is comple...
Embodiment 2
[0203] medical trocar
[0204] This embodiment provides a trocar with a retractable part that can fall off. The trocar in this embodiment is improved on the basis of the trocar in Embodiment 1. The main improvements are as follows:
[0205] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, in this embodiment, the needle hub 3 includes a head end part 10, a middle part 11 and a tail end part 12 connected in sequence;
[0206] Moreover, a first part 13 and a second part 24 are provided on the outer surface of the tail end part 12, and the detachment part 7 is closely attached to the tail part 12, and the front end of the detachment part 7 is provided with There is a third part 25; the third part 25 is matched with the first part 13, and the third part 25 is matched with the first part 13 so that the third part 25 is compatible with the tail part 12 tightly clamping fit; the first edge 26 of the third part 25 and the second edge 27 of the second part 24 are in ...
Embodiment 3
[0211] Needle hub and medical trocar
[0212] This embodiment describes a preferred needle hub and a medical trocar using the needle hub.
[0213] Similar to embodiment 1, this embodiment adopts Figure 5 Medical trocars with hubs shown, including:
[0214] a catheter socket;
[0215] an indwelling catheter, the indwelling catheter is arranged at the front end of the catheter adapter;
[0216] a hub 3, said hub being located inside said catheter hub; and
[0217] A puncture needle, one end of the puncture needle is fixed to the needle seat, and the puncture needle and the needle seat are hollow structures communicating with each other.
[0218]Wherein, the trocar includes a puncture state and an indwelling state; in the puncture state, the puncture needle is placed in the indwelling catheter; , from the puncturing state to the indwelling state. In the indwelling state, the puncture needle is placed in the catheter adapter, wherein the needle tip of the puncture needle is...
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