JPS59207159A - Intravenous administration set - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION 3.1 Technical Field This invention relates to the intravenous injection of fluid into a patient, and more particularly to the use of a filter to remove particulate matter and gases. Concerning intravenous infusion or injection fluid sets.

3.2 Background Art When injecting intravenous fluids into a patient, it is well known to place a filter in line arrangement between the fluid supply bag or container and the patient.

Such filters are used to remove air and other debris from the lines, as well as to filter particulate matter from the fluid prior to patient administration. And such filters are widely used for intravenous infusions. Examples of filters and filter sets disclosed in patents for this purpose are U.S. Pat.
No. 18,812 and No. 4,298,358.

These patents, as well as prior art documents, show filter cases with an inlet and an outlet at both ends. When the filters are assembled into a dosing set and the set is suspended from a supply bag or container, typically
The filter inlet is oriented to receive tubing from the fluid supply at its top, and the filter outlet is located at the bottom of the filter. Flow generally flows from the top to the bottom of a conventional filter.

In using a dosing cent, the first step after loading the cent into a source of intravenous fluid is to prime the set by flooding it with fluid from the source ( Instructions for priming a conventional filter in such a set typically involve traversing the filter to remove all trapped downstream of the filter. It is necessary to direct air upwardly through the filter outlet and to expel this air from the device before connecting it to the patient.

3.3 SUMMARY OF THE INVENTION The present invention provides an intravenous administration set with a filter communicating at its upstream end with an elevated intravenous infusion or injection fluid source.

This cent has a filter having a chamber divided by a filter medium into an upstream chamber and a downstream chamber, with an inlet in the upstream chamber and an outlet in the downstream chamber. Piping communicates fluid between the fluid source and the inlet. This piping also allows the filter to be physically suspended below the source, in which case the outlet of the downstream chamber is free (1) when the set is suspended from the source by its own weight. Orient it so that it is located above the downstream chamber. In this way, the outlet can be primed with fluid from the source and air in the downstream chamber can escape through the outlet B1 without having to manually manipulate the position of the filter in the set. .

In a preferred embodiment, the inlet and outlet are located side by side at the top of the filter. The inlet defines an inflow passage downwardly into the upstream chamber, and the outlet defines an outflow passage upwardly from the lower chamber.

3. In the filter provided by this invention, it is preferable to use a sheet made of a hydrophilic membrane as the filtration medium. Desirably, the membrane has a burst pressure in both directions that exceeds the burst pressure of the filter case.

3.4 Details of Explanation Based on Examples This invention will be explained in detail below using examples and drawings.
.

One form of filter 10) according to the invention is shown in FIGS. 1-3. The outer surface of the filter 1101 is made as a rigid plastic case 02 formed by joining an upstream case iB portion (14) and a downstream case portion (b).

The internal space or chamber surrounded by the filter case 02 is divided into an upstream chamber (18) and a downstream chamber (20) by the filter material (22).
Divide into. Preferably, the filter material (22) is a sheet-like hydrophilic membrane that, when wet, resists the passage of air and other debris that may be entrained in the fluid flowing through the device. A suitable hydrophilic membrane is used in filters sold by Kelman Science, Inc. of Ann Arbor, Mich., USA. Filter +1or rJ, each case part α→
(Can be formed by pressing the membrane (22) between 10 and gluing both casing parts together using a suitable technique, such as radio frequency welding.

The top of the upstream chamber (18) is provided with an inlet (24) defining a passage for downward flow into the upstream chamber (18).

In addition, this chamber (18) is provided with a ventilation hole (26) covered with a hydrophilic membrane (28), and the passage of air through this ventilation hole (26) is allowed, but the passage of adult animals is not allowed. .

The downstream chamber (20) is provided with an outlet (30) in its section for upward fluid flow through the top of the downstream chamber (20). The assembled filter (10) thus differs from conventional filters in that the inlet (24) and outlet (30) are arranged adjacent to the top of one filter case. , is similar to the filters shown in FIGS. 1 to 3, but differs in that the matching of both case parts αΦQQ is changed by 1800 from the case of the present invention. That is, conventionally, the downstream case part (1flD It is rotated 180 degrees from the orientation shown in Figure 2 so that its outlet is at the bottom of the filter.

The hydrophilic membrane (22) should have a burst pressure or pressure threshold higher than the case burst pressure for fluid flow in both directions within the filter to maintain the membrane in its original shape. . It is desirable that the burst pressure of the case be at least 25 PS.

A filtered intravenous administration set constructed in accordance with the present invention is shown in FIG. 4, using a filter such as that shown at filter 101. This set is attached to a container (40) with an outlet at the bottom formed by a spike (42).

771- (is located below the spike (42) in the dripping chamber (44).
). A tube member (46) is connected downward from this drip chamber (44).
) is extended and connected to the inlet (24) of filter j10). An outlet tube (48) for fluid flow exiting the filter.
extends upwardly from the filter outlet (30). To avoid creases in the tubing, a separator (50) forming part of a TJ bill is provided in the outlet tube (48). A roller clamp (52) is provided to regulate or block flow through the tube (48), and an end fitting (54) is provided on the outlet tube (48) for connection to the patient's catheter site. If the filter (10) is attached to the intravenous fluid supply source (40) so that it hangs down freely due to its own weight, the filter (10) is attached to the outlet (3) of the downstream chamber.
0) is oriented so that it is at the top of the downstream chamber (20).

As shown in FIG. 5, a suitable isolator (50) can be attached to a simple scraping part with threaded holes (56) (58) to form a suitable loop in the outlet tube (48). It can be made with. Alternatively, means for extending the flow downward from the downstream chamber outlet (30) to the patient seat may be configured integrally with the filter case α.

In use, the structure and orientation of this filter (10) in the filter set shown in FIG. 4 simplifies the device for carrying out intravenous administration.

Briming the set with fluid allows air to be forced upwardly and outwardly through the outlet (30) and away from the downstream chamber (20) without manual manipulation of the filter orientation. Furthermore, it is believed that filters according to the invention exhibit other potential advantages during use. Opposite directions of inlet and outlet flow appear to increase the effective area of the membrane (22) being utilized in filtration operations, which will extend the useful life of the filter. Furthermore, according to the filter of the present invention, the downstream chamber (
20) can act as a settling chamber for all particulates removed from filtration by membrane (22). In conventional filters, such particulates settle downward toward the bottom-facing outlet.

In the filter of this invention, its sedimentation properties move particulates away from the filter outlet (30).

Although this invention has been described above in detail with reference to an embodiment, it is needless to say that this embodiment can be modified in various ways without departing from the shaft thrust of this invention.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a fluid filter for intravenous infusion constructed according to the present invention as seen from the upstream side, FIG. 2 is a concave perspective view of FIG. 1 as seen from the downstream side, and FIG. FIG. 4 is an explanatory diagram of a fluid filter set for intravenous infusion assembled according to the present invention, and FIG. 5 is a cutaway view taken along line 3-3 of FIG. FIG. 10...filter, 12.filter case, 14.
Upstream case part, 16 Downstream case part, 18... Upstream chamber, 20 Downstream chamber, 22 Filter material, hydrophilic membrane, 24... 18 inlet, 26... Ventilation hole, 28 Water absorbent membrane, 30... outlet of 20, 40...dose supply bag or container, 42...spike, 44...dropping chamber, 46...
Pipe member, 48. Outlet pipe, 50 Pipe isolation material, 52. Roller clamp, 54. End fitting, 56.58. Hole. Procedural Sleeves (Method) May 10, 1980 Director-General of the Patent Office

Claims (1)

[Claims] (1) The upstream end communicates with a fluid supply source for intravenous infusion located at a high position, and the chamber is divided into an upstream chamber and a downstream chamber by a filter material, an inlet leading to the upstream, and a downstream chamber. a filtered vein, each having a filter with an outlet from the chamber and a tubing providing fluid communication between the fluid source and the inlet and physically lowering the filter 17X below the fluid source; When the set is suspended freely from the fluid supply by its own weight, the outlet from the downstream chamber is positioned so that the outlet is above the downstream chamber, and the set is suspended freely from the fluid supply by its own weight. (2) an intravenous administration set with a filter, such that briming of the center with fluid from the outlet allows air in the downstream chamber to escape through the outlet; (2) the inlet and outlet are placed on top of the filter; (3) An inlet forms an inflow passage downwards to the upstream chamber; an outlet forms an outflow passage upwards from the downstream chamber; 2) The administration set of the item. (4) The administration center according to claim (1), wherein a sheet made of a hydrophilic membrane is used as the filter medium. , 5] A dosing center according to claim 4, wherein the bursting pressure of the hydrophilic membrane exceeds the bursting pressure of the filter case for flow in both directions. 16) Claim 1 in which an air ventilation hole is provided in the upstream chamber
Administration set described in section 1). (7) In a filter for intravenous infusion that has a chamber divided into an inflow part and an outflow part by a filter material, and has an inlet and an outlet that communicate with these parts, the position of the outflow part is the same as the inflow part. By locating the inflow and outflow points on the same external side of the chamber, the inflow and outflow points are located above the chamber to allow air to escape through the outlet, 2 and to prime the fill with fluid passing through the inlet. Filter for intravenous infusion. (8) A filter for intravenous infusion according to claim (7), wherein the inlet forms a downward inflow passage leading to the upstream chamber, and the outlet forms an upward outflow passage from the downstream chamber. (9) A filter for intravenous infusion according to claim (7), which uses a sheet made of a hydrophilic membrane as the filtering material. (10) Claim O(
9) The intravenous infusion filter described in section 9). It has a chamber divided into an inlet chamber and an outlet chamber by Il and IJ filtration chambers, and each of these chambers has an inlet and an outlet that communicate with the inlet chamber and the outlet chamber, respectively.
In a vein-dwelling filter, the outlet is configured to form an inlet passageway into the inlet chamber along a second direction, and an outlet passageway from the outlet chamber along a second direction rotated 1800 degrees from the first direction. A filter for intravenous infusion with the selected location. (Intravenous infusion filter according to claim 5, in which the inlet and outlet are located at the top of the filter.