Continuous positive pressure indwelling needle and installation and using method thereof

[0030] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples, and detailed descriptions are as follows with accompanying drawings:

[0031] figure 1 It is a schematic diagram of the structure of a continuous positive pressure indwelling needle disclosed in the present invention, such as figure 1 As shown, the present invention discloses a continuous positive pressure indwelling needle, which is formed by assembling a continuous positive pressure device (01) and an indwelling needle (02) into one body, figure 2 It is a schematic diagram of the structure before adding liquid of a continuous positive pressure device for a continuous positive pressure indwelling needle disclosed in the present invention, such as figure 2 As shown, the continuous positive pressure device (01) includes a screw joint (03), a protective cover (04), a support cylinder (05), a silica gel storage bag (06) and one or more hollow nano-membrane (07), one The layer or multilayer hollow nanomembrane (07) is put into the inner cavity of the bonding end of the support cylinder (05) and fixed together with the sealer (08). The support cylinder (05) and the screw joint (03) are bonded and fixed, The open end of one or more layers of hollow nano-membrane (07) is opposite to the liquid outlet (09) of the screw joint (03), the silica gel storage bag (06) is sleeved on the support tube (05), and the silica gel storage bag ( The open end of 06) is tightly welded to the screw joint (03). The upper end of the silicone liquid storage bag (06) has a closed end (10), and the closed end (10) is fitted into the filling hole at the upper end of the protective cover (04) (Figure Not shown in), the screw joint (03) and the protective cover (04) are welded into one body.

[0032] In an embodiment of the continuous positive pressure indwelling needle disclosed in the present invention, one or more hollow nano-membrane (07) is an ultrafiltration membrane with a wall thickness of 10-100 μm, and the wall is provided with a pore size of 1-50 nm, And one or more hollow nano-membrane (07) upper ports are heat-melted and sealed together.

[0033] In an embodiment of the continuous positive pressure indwelling needle disclosed in the present invention, the outside of the open end of the silicone liquid storage bag (07) has a thicker boss (11) to fit the screw joint (03) more closely.

[0034] In an embodiment of the continuous positive pressure indwelling needle disclosed in the present invention, the upper closed end (10) of the silicone liquid storage bag (07) has a thick silicone layer to achieve multiple punctures by the injection needle without leakage. The inner side of the thick silicone layer A pit (12) is provided to facilitate the discharge of gas in the liquid storage bag (07).

[0035] In the embodiment of the continuous positive pressure indwelling needle disclosed in the present invention, the side wall of the silicone liquid storage bag (07) has a thin silicone layer, and the elasticity of the thin silicone layer after expansion is small, which is slightly higher than the venous pressure.

[0036] In the embodiment of the continuous positive pressure indwelling needle disclosed in the present invention, the screw joint (03), the protective cover (04), the silicone liquid storage bag (06) and the support cylinder (05) are made of transparent materials, which is convenient for observing the remaining liquid Condition and observe whether the gas remains.

[0037] In the embodiment of the continuous positive pressure indwelling needle disclosed in the present invention, the upper end of the protective cover (04) is close to the filling hole position and the side of the screw joint (03) are respectively provided with a first exhaust hole (13) and a second exhaust hole The hole (14) is used to exhaust the gas in the protective cover (04).

[0038] In the embodiment of the continuous positive pressure indwelling needle disclosed in the present invention, a plurality of long holes (15) are opened on the end surface and side wall of the support cylinder (05) to allow liquid and gas to pass.

[0039] The invention discloses a method for installing a continuous positive pressure indwelling needle, including:

[0040] Step 1. Put one or more layers of hollow nanomembrane (07) into the inner cavity of the bonding end of the support cylinder (05) and connect them together with the sealing material (08), and then cut one end of the sealing material (08) flat ;

[0041] Step 2: Bond the support tube (05) and the screw joint (03) into a whole;

[0042] Step 3: Put the silicone liquid storage bag (06) on the support tube (05), and connect the open end of the silicone liquid storage bag (06) with the screw joint (03) tightly by heat welding;

[0043] Step 4. Install the closed end (10) of the silicone liquid storage bag into the filling hole of the protective cover (04), and then plastically weld the screw joint (03) and the protective cover (04) to form a continuous positive pressure device (01) );

[0044] Step 5. Finally, assemble the continuous positive pressure device (01) and the indwelling needle (02) into one.

[0045] image 3 It is a structural schematic diagram of a continuous positive pressure device for a continuous positive pressure indwelling needle disclosed in the present invention after adding liquid, such as image 3 As shown, a method for using a continuous positive pressure indwelling needle disclosed in the present invention includes:

[0046] Step 1. Pierce the syringe filled with liquid into the silica gel storage capsule (06) and add the liquid. During the addition, the gas in the silica gel storage capsule (06) is drawn back into the syringe;

[0047] Step 2. The silicone liquid storage bag (06) expands and stores liquid, and continues to add liquid until it is full and then pull it out;

[0048] Step 3. Use a syringe to add liquid to the flow channel of the liquid outlet (09) of the screw joint (03) to discharge all the gas;

[0049] Step 4. After the infusion of the indwelling needle (02) is completed, first remove the infusion device connected to the indwelling needle (02), and then install the continuous positive pressure device (01) on the indwelling needle (02) for use. It is convenient to use the instrument together.

[0050] Finally, it should be noted that: Obviously, the above-mentioned embodiments are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. There is no need and cannot give an exhaustive list of all implementation methods. The obvious changes or changes derived from this are still within the protection scope of this description.