JP-2022540626-A5 -

Dates

Publication Date

20230525

Application Date

20200707

Description

In embodiments, the spring clip may include an opening. In embodiments, the introduction needle may extend through the opening of the spring clip. In embodiments, the spring clip is spaced apart from the opening, thereby reducing the frictional resistance to the introduction needle when it is withdrawn. In embodiments, the outer diameter of the introduction needle proximal to the protrusion may be slightly smaller than the proximal opening of the housing so that the introduction needle contacts and is supported by the proximal opening. In these embodiments, the tight seal between the introduction needle and the proximal opening of the housing can prevent blood from leaking from the proximal opening of the housing. In embodiments, the housing may include an outer housing. In embodiments, the needle assembly may include a biasing element located within the housing. In embodiments, the biasing element may include a proximal opening with a diameter smaller than the outer diameter of the protrusion. In embodiments, the guide needle may extend through the distal opening of the housing and the proximal opening of the biasing element. In the embodiment, the distal tip can be configured to be withdrawn proximal from a first position toward a specific second position toward a particular second position toward which the raised portion contacts the proximal opening of the biasing element. In the embodiment, in response to the proximal withdrawal of the distal tip toward a specific third position toward a particular third position, the biasing element moves proximal to the U-shaped portion, releasing the U-shaped portion from the compressed position and releasing the arm from the catheter adapter, and the U-shaped portion can also close the distal opening to prevent the tip of the introduction needle from protruding from the distal opening . Referring to Figure 1C, the distal tip 28 is shown between the first and second positions. Referring to Figure 1D, in this embodiment, in response to the proximal withdrawal of the distal tip 28 from the first position to the second position shown in Figure 1C, for example, the raised portion 30 comes into contact with the proximal opening 36. Referring to Figure 1F, in the embodiment, the first end of the spring clip 44 may include a needle tip shield function or shield portion 52. In the embodiment, the shield portion 52 may be generally L-shaped and extend from the U-shaped portion 50. In the embodiment, in response to the proximal withdrawal of the distal tip 28 from a second position to a third position, the shield portion 52 can block the distal opening 34 so as to prevent the distal tip 28 from exiting the distal opening 34. In the embodiment, the spring clip 44 or shield portion 52 can also prevent blood from leaking from the distal opening 34. In the embodiment, the spring clip 44 may include an opening 58. In the embodiment, the introduction needle 26 may extend through the opening 58 of the spring clip 44. In the embodiment, the spring clip 44 has a gap from the opening 58, which reduces the frictional resistance to the introduction needle 26 when the introduction needle 26 is withdrawn proximal. In the embodiment, the outer diameter of the introduction needle 26 proximal to the protrusion 30 may be slightly smaller than the proximal opening 36 of the housing 32 so that the introduction needle contacts and is supported by the proximal opening 36. In these embodiments, the precise fit between the introduction needle 26 and the proximal opening 36 of the housing 32 prevents blood from leaking through the proximal opening 36 of the housing 32. Referring to Figure 2C, in this embodiment, for example, in response to the withdrawal of the distal tip 28 in the proximal direction from the first position to the second position as shown in Figure 2C, the raised portion 30 comes into contact with the proximal opening 80.