TWI583414B - Intravenous infusion set (IV SET) of the micro tube of the floating stop assembly - Google Patents

Description

Inflatable sleeve (IV SET) micro-tube floating stop assembly

This case relates to an IV set (referred to as IV SET), and more specifically, a floating stop assembly disposed in a microtube (or drip) of the IV set.

As shown in the first figure, a typical IV infusion set (IV SET) generally includes a pin 1 that can be inserted and connected to the output portion 8 of an IV bag (can) 6, and a pin tube is connected below the pin 1 2 (or a drip bucket), the lower end of the microtube 2 is connected to a long hose 3, and the long hose is provided with a regulator 4, and the end of the long hose 3 is connected to an injection needle 5. A complete IV set is provided with a sheath (not shown) for protection of the outside of the needle 1 and the injection needle 5. The needle 1 introduces the intravenous infusion 60 in the intravenous infusion bag 6 into the microtube 2 and the long hose 3. The microtube 2 is a soft elastic bobbin structure, and the intravenous infusion package (can) can be performed by an external squeezing action. The intravenous infusion 60 is introduced into the microtube 2 through the needle 1, so that the intravenous infusion 60 is stored in the microtube 2, and the IV infusion 60 is controlled to pass through the regulator 4, and the intravenous infusion 60 is continuously introduced through the infusion rate of the needle 1. The microtube 2 and the long hose 3 are output by the injection needle 5.

The above-mentioned typical intravenous infusion set, the micro tube 2 does not have an automatic cut-off function for preventing excessive drop of the infusion surface, preventing air from entering the long hose 3, and preventing the blood from flowing back to the venous end of the human body. When the intravenous infusion of the IV bag (can) is completely output, the remaining infusion in the microtube 2 will still flow to the long hose 3, so that the microtube 2 is in a clear state, and the air enters the long hose 3, changing the intravenous infusion. The internal pressure of the sleeve easily causes the blood of the venous end of the human body to flow back into the long hose 3 through the injection needle 5, and the blood coagulates to block the end of the injection needle 5 and the long hose 3, so that the entire intravenous infusion set must be replace.

Another problem with air entering the long hose 3 is the difficulty of air removal. When replacing a new intravenous infusion bag (can), it is necessary to find a way to return the air entering the long hose 3 back to the microtube 2 In the middle, the technology of eliminating air causes the workload and time delay of the personnel, and does not rule out that the clean air will cause the risk of embolism with the intravenous infusion into the human venous blood vessels.

In view of the above problems, it is necessary to provide an automatic cut-off output function in the micro tube. Therefore, the present invention provides a floating stop assembly for use in a micro tube, which can function as an automatic cut-off output, thereby effectively preventing infusion of the micro tube. Excessive surface drops, infusion clearance, air into long hoses, and backflow of blood from the venous end of the human body.

The floating stop assembly of the micro-tube of the intravenous infusion set (IV SET) for achieving the above purpose comprises an outer member and a weight member disposed at the inner bottom end of the outer member. The outer part is formed in a hollow cylindrical structure; a bottom end of the outer part is formed with a stopper end, and an annular diaphragm is formed on the surface of the outer part close to the stopper end, and the weight part automatically falls on the gravity The lowest point inside the plug end. The stop assembly is disposed within the microtube and has a stopper end opposite the outlet end of the microtube.

Further, the outer member is an integrally formed closed hollow cylindrical structure, and the weight member is contained inside during the injection molding process.

Further, the outer component is formed by two independent sets of opposite components, and the weight is included in the stacking process.

The effect of the case: using the principle of buoyancy, the stop assembly can float on the infusion surface of the microtube, ring The diaphragm maintains the floating stop assembly in balance and moves downward as the infusion surface is lowered. When the infusion in the microtube is used up, the stop assembly has a stopper end with a weight member when the gravity is used up. Plug the liquid outlet of the micro tube to prevent the micro tube from emptying, prevent the air from entering the long hose of the intravenous infusion set, and maintain the pressure inside the intravenous infusion set, thereby preventing the backflow of blood from the venous end of the human body.

The microtube is squeezed by an external squeezing action (the regulator on the long hose should be closed first, so that the intravenous infusion in the long hose does not flow), and the intravenous infusion in the IV bag (can) can be passed through The needle is introduced into the micro tube, and the intravenous infusion enters between the bottom end of the micro tube and the outer wall of the stopper assembly into the gap between the bottom end of the stopper assembly and the liquid outlet end of the micro tube, so that the infusion surface in the micro tube rises. Using the buoyancy principle, the stop assembly re-floats on the infusion surface.

The hollow cylindrical structure of the outer member of the present invention allows the stop assembly to have buoyancy and float on the infusion surface of the microtube, which allows the stop assembly to float in a balanced manner.

The weight member of the invention has the stop assembly having a center of gravity at a lower position, and when the height of the infusion surface of the micro tube is too low, the weight member causes the stop assembly to stably land on the micro tube by gravity At the outlet end, the weight member causes a weight gain at the stopper end, so that the stopper end completely closes the liquid outlet of the microtube.

10‧‧‧stop assembly

20‧‧‧External components

22‧‧‧ Stop end

23‧‧‧Ring diaphragm

24‧‧‧attenuation

25‧‧‧Outer casing

250‧‧‧ inner wall

251‧‧‧ openings

26‧‧‧Inner casing

261‧‧‧ openings

262‧‧‧Cone end

263‧‧‧ Seal

264‧‧‧檐

30‧‧‧With weights

41‧‧‧Microtube

42‧‧‧liquid outlet

43‧‧‧liquid outlet

50‧‧‧Chimeric structure

51‧‧‧Internal chimeric ring

511‧‧‧ directional guide surface

512‧‧‧Reverse limit

52‧‧‧Outer chimeric ring

521‧‧‧ directional guide surface

522‧‧‧Reverse limit

60‧‧‧ intravenous infusion

61‧‧‧ Infusion surface

The first figure is a schematic plan view of a conventional intravenous infusion set.

The second figure is an exploded perspective view of the stop assembly of the present invention.

The third figure is a cross-sectional exploded view of the stop assembly of the present invention.

The fourth figure is a combined appearance view of the stop assembly of the present invention.

Figure 5 is a cross-sectional view showing the combination of the stop assemblies of the present invention.

The sixth figure is a schematic view of the stop assembly of the present invention used in a microtube and floating on the infusion surface.

The seventh figure is a schematic view of the stop assembly used in the present invention for the micro tube and the closed liquid outlet.

For the convenience of the description, the central idea expressed by the present invention in the column of the above summary of the invention is expressed by the specific embodiments. Various items in the embodiments are depicted in terms of ratios, dimensions, amounts of deformation, or displacements that are suitable for illustration, and are not drawn to the proportions of actual elements, as set forth above. In the following description, similar elements are denoted by the same reference numerals, and a plurality of identical elements are represented by only one number.

As shown in the fourth figure, the floating stop assembly 10 of the present invention includes an outer member 20 and a weight member 30 disposed at the inner bottom end of the outer member 20. The weight member 30 is a rollable weight member. In the embodiment, the weight member 30 is a metal ball. The outer member 20 has a hollow cylindrical structure as a whole, and a stopper end 22 is formed at a bottom end thereof, and an annular diaphragm 23 is disposed on an outer surface of the outer member 20 adjacent to the stopper end 22, and the outer member 20 is adjacent to the ring shape. The outer surface of the diaphragm 23 is provided with a tapered diameter section 24. The shape of the stopper end 22 corresponds to and conforms to the internal cross-sectional shape of the liquid outlet end 42 of the micro-tube 41 of an IV set, and the shape of the stopper end 22 can be hemispherical or conical. In the present embodiment, the stop end 22 is represented by a hemisphere. The weight member 30 automatically falls at the lowest point inside the stopper end 22 due to gravity.

The axial length of the outer member 20 is at least one-half shorter than the axial length of the microtube 41 so that the interior of the microtube 41 still retains sufficient space to accommodate the intravenous infusion. The outer diameter of the outer member 20 and the annular diaphragm 23 are smaller than the inner diameter of the microtube 41. The stop assembly 10 is filled into the microtube 41 with its stop end 22 opposite the outlet end 42 of the microtube 41.

The outer member 20 can also be formed by two independent sets of relatively independent sets during the assembly process. The weight member 30 is contained therein as in the second to fifth figures. In addition, the outer member 20 may also be an integrally formed closed hollow cylindrical structure in which the weight member 30 is contained in the injection molding stage.

The outer member 20 includes an outer sleeve 25 and an inner sleeve 26, both of which are made of a resilient plastic material. The outer sleeve 25 is a hollow structure having an opening 251 at its upper end, and the bottom end is formed with the stopper end 22, the annular diaphragm 23 and the tapered diameter section 24. The inner sleeve 26 is also a hollow structure, the bottom end of which is provided with an opening 261, and the outer end of the bottom end is a tapered end 262 having a tapered diameter; the top end of the inner sleeve 26 is a mouth 263, and a periphery of the seal is formed. Convex 264. A fitting structure 50 is disposed between the outer sleeve 25 and the inner sleeve 26.

The fitting structure 50 includes at least one inner fitting ring 51 disposed on the inner wall of the outer sleeve 25, and at least one fitting ring 52 disposed outside the outer wall of the inner sleeve 26. In the present embodiment, a plurality of inner fitting rings 51 and outer fitting rings 52 are presented. The inner fitting ring 51 includes a downwardly facing forward guiding surface 511 and a reverse limiting portion 512 connected between the bottom end of the forward guiding surface 511 and the inner wall 250 of the outer sleeve 25; The fitting ring 52 includes a downwardly facing forward guiding surface 521 and a reverse limiting portion 522 connected between the upper end of the forward guiding surface 521 and the outer wall 260 of the inner sleeve 26.

The outer sleeve 25 and the inner sleeve 26 are relatively sleeved with their openings 251, 261, and the tapered end 262 guides the inner sleeve 26 to easily enter the outer sleeve 25; The forward guiding surfaces 521, 511 of the inner sleeve 26 and the outer sleeve 25 are guided to slide each other, so that the inner sleeve 26 can be moved into the outer sleeve 25 until the tenon 264 of the inner sleeve 26 is blocked. The peripheral wall surface of the opening 251 of the outer sleeve 25 passes through the above-mentioned reverse restricting portions 512, 522 to interfere with each other, so that the inner sleeve 26 and the outer sleeve 25 which are engaged with each other cannot be reversely moved and separated.

In the embodiment of the present invention, the wall thickness of the outer sleeve 25 is smaller than the wall thickness of the inner sleeve 26, and the thin outer sleeve 25 can provide a proper outward elastic tension, so that the inner sleeve 26 can be more smoothly fitted. Among them, the thin-walled outer sleeve 25 can also exert an appropriate elastic converging force, thereby covering the inner sleeve 26 to increase the stability of the combination.

The sixth and seventh figures depict the situation of the stop assembly 10 of the present invention in the microtube 41. The stop assembly 10 is placed in the microtube 41, and the microtube 41 is squeezed by an external squeezing action, and the intravenous infusion 60 in the IV bag (can) can be passed through the pin (as shown in the first figure). Into the microtube 41, the intravenous infusion 60 enters between the bottom end of the stopper assembly 10 and the bottom end of the microtube 41 from the gap between the inner wall of the microtube 41 and the outer wall of the stopper assembly 10, and the tapered end 262 A function of guiding the intravenous infusion 60 to the bottom end of the microtube 41, the infusion surface 61 in the microtube 41 is increased with the accumulation of the intravenous infusion 60, and the stop assembly 10 floats on the infusion surface 61 by the principle of buoyancy. The annular diaphragm 23 of the stop assembly 10 balances the floating stop assembly 10 and moves downward as the infusion surface 61 is lowered; when the intravenous infusion 60 in the microtube 41 is used up [usually intravenous infusion The intravenous infusion in the bag (can) is used by the weight member 30, the stop assembly 10 has a center of gravity at a lower position, and the stop assembly 10 has a weight member by the principle of gravity. The stopper end 22 of the 30 plugs the liquid outlet 43 of the microtube 41, and the stopper end 22 is generated due to the weight of the weight member 30. Increased weight, that the stop plug 22 is completely closed end of the microtube 41 of the liquid outlet 43.

Replace the IV bag (can), remove the needle of the IV set from the output of the empty IV bag (can), and insert it into the output of the new IV bag (can), and use the instructions in this case. In the manner described in the above paragraph, the intravenous infusion can be re-entered into the microtube 41, so that the stop assembly 10 floats again on the infusion surface.

10‧‧‧stop assembly

20‧‧‧External components

22‧‧‧ Stop end

23‧‧‧Ring diaphragm

24‧‧‧attenuation

25‧‧‧Outer casing

263‧‧‧ Seal

264‧‧‧檐

Claims (4)

A floating stop assembly for a micro-tube of an IV infusion set (IV SET), the floating stop assembly comprising: an outer member and a weight member mounted at an inner bottom end of the outer member; the outer member is hollow a cylindrical structure, wherein a bottom end is formed with a stopper end, and an outer surface of the outer member adjacent to the stopper end is provided with an annular diaphragm; the outer member comprises an outer sleeve and an inner sleeve, and the outer sleeve is a hollow The structure has an opening at an upper end thereof, and the bottom end is formed with the stopper end and the annular diaphragm; the inner sleeve is a hollow structure, and an open end is provided at the bottom end, and the outer end of the bottom end is a tapered end with a tapered diameter The top end of the inner sleeve is a mouth, and a periphery is formed around the seal; the outer sleeve and the inner sleeve are respectively sleeved with each other opposite to each other, and the inner sleeve is sleeved in the outer sleeve; The floating stop assembly is disposed in a microtube of an intravenous infusion set, the stopper end being opposite to the outlet end of the microtube. The floating stop assembly of the micro-tube of the IV infusion set (IV SET) according to claim 1, wherein a fitting structure is arranged between the outer sleeve and the inner sleeve. The floating stop assembly of the micro-tube of the intravenous infusion set (IV SET) according to claim 2, wherein the fitting structure comprises at least one inner fitting ring disposed on the inner wall of the outer sleeve, and at least a ring disposed outside the outer wall of the inner sleeve; the inner fitting ring includes a slanting upward facing directional guide surface and a bottom end connected to the compliant guide surface and the inner wall of the outer sleeve a reverse limiting portion; the outer fitting ring includes a downwardly facing downward guiding surface and a reverse limiting portion connected between the high end of the forward guiding surface and the outer wall of the inner sleeve; the outer sleeve When the tube and the inner sleeve are sleeved, the forward guiding surfaces of the two guide the sliding guides to move the inner sleeve into the outer sleeve; and the inner fitting ring and the outer fitting ring are transmitted through the inner sleeve The reverse restricting portion separates the inner sleeve and the outer sleeve that are engaged with each other without being reversely moved. A floating stop assembly for a microtube of an IV infusion set (IV SET) according to claim 1, wherein the outer sleeve has a wall thickness smaller than a wall thickness of the inner sleeve.