JPH0156782B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a medical device of the type used for dispensing parenteral fluids to a patient, and more particularly to an administration set including a bottle with a pivotable pneumatic valve. .

Administration sets containing bottles with drip chambers are widely used for administering parenteral fluids to patients. The barrel typically includes a barrel chamber having a main liquid inlet to the chamber and an injection site communicating with the chamber for injecting a drug into the chamber, for example, so that the drug can be diluted with the main fluid. .

Communication between the chamber and the air on the chamber side is necessary when the chamber is being filled with liquid or when a drug is being injected into the chamber for dilution with liquid. In one prior art dosing set construction for this purpose, an air tube communicates with the brewing chamber, having a filter at one end and a clamp between the filter and the brewing chamber. When it is desired to open the brewing chamber to air, the clamp is opened.

U.S. Patent No. 3776229 corresponding to JP-A-48-63591
In another prior art structure of No. 1, a rotary air valve communicates with the brewing chamber to provide the necessary air exhaust. However, the rotary air valve disclosed in this patent has several drawbacks. For example, because of the groove structure of this system, the rotatable portion of the air valve is easily extracted by the operator.
Additionally, it has been discovered that the pneumatic valves disclosed in this patent generally require a silicone lubricant to provide adequate sealing when the valve is closed. This is disadvantageous because silicone lubricant can be introduced into the barrel. Additionally, filters mounted within air valves can become clogged, especially when the unit is shaken by an operator, and once clogged there is no way to unblock the filter. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a dispensing set having a barrel that eliminates the need for an air tube extending from the barrel chamber with a clamp between the air filter and the barrel chamber.

Another object of the invention is to provide a dosing set having a billet with a pivotable air valve of a type that is not easily removed by the operator.

Another object of the present invention is to provide a dosing set with a dispenser that uses a pneumatic valve that does not require silicone lubrication.

Yet another object of the present invention is to provide an air valve that is structurally configured to allow an operator to at least partially unclog the filter supported by the pneumatic valve if the filter becomes clogged. An object of the present invention is to provide a dispensing set with an air valve.

Other objects and advantages of the invention will become apparent as the description progresses.

In accordance with the present invention, there is provided a medical dispensing device having a chamber and a stationary port extending from a wall of the chamber and having a bore therethrough, the stationary port supporting a fitting having an open interior portion. the top of the fitting includes a passageway, the fitting closes off the stationary port except for the passageway, the passageway being substantially smaller than the open inner portion; an air filter lying directly below the passageway across a bore of the stationary port; further comprising a pivotable closure overlying and pivotally connected to the stationary port; A movable closure has an opening for communicating with the passageway when the closure is pivoted to a predetermined open position and for communicating the opening of the closure from the passageway when the closure is in its closed position. means for blocking, said blocking means comprising a resilient member movable with rotational movement of said closure to close and seal said passageway when said closure is not in a predetermined open position;
The medical device is provided, wherein the fitting is sized and shaped to compress the resilient member while the resilient member closes and seals the passageway.

In an illustrative embodiment, the stationary port comprises an open annular member and a separate fitting secured to the annular member. A separate fitting and a pivotable closure are pivotally connected and include a circular flange and a cooperating groove arrangement, with the fitting provided with the flange and the closure provided with a cooperating groove. The pivotable obturator includes a handle for manual grasping, and the obturator and the stationary port are in a secure pivot connection to prevent removal of the obturator from the port by an operator. Ru.

In an illustrative embodiment, the resilient member comprises a ball supported by the obturator and spaced from an aperture in the obturator, and the engagement member rotates the obturator to its predetermined open position. It has a slanted groove to accommodate the ball when it is played. The sloping groove cannot compress the ball when the obturator is in its predetermined open position, and when the obturator is rotated to the closed position, the ball moves up the slope and the obturator is in the closed position. The ball is shaped and dimensioned to place the ball under compression and close the passageway when in position.

A further detailed description of the invention is provided in the following description and claims, and is illustrated in the accompanying drawings.

FIG. 1 is a drawing of a dosing set constructed in accordance with the principles of the present invention.

FIG. 2 is a front view, partially cut away, to clearly show the dispenser used in conjunction with the dosing set of FIG. 1 and its attached dripping chamber.

3 is a plan view of the billet of FIG. 2 showing in phantom the possible movements of the rotatable valve; FIG.

FIG. 4 is a cross-sectional view of the barrel taken along the plane of line 4--4 of FIG.

FIG. 5 is a greatly enlarged partial cross-sectional view of the rotatable air valve in a predetermined open position.

and FIG. 6 is a greatly enlarged partial cross-sectional view of the air valve with the rotatable valve shown in the closed position.

Referring to FIG. 1, there is shown an administration set constructed in accordance with the principles of the present invention. The dosing set has a conventional spike 10 for connection to a parenteral fluid source, a tube 12 connected to the main fluid inlet 14 (FIG. 4) of the bottle 16, a drip chamber 18 extending from its bottom, and a flow line. a tube 2 connected from the drip chamber 18 to the injection site 24;
2, a roller clamp 26 on the tube 22, and a tube 28 connected from the outlet of the injection site 24 to a conventional needle adapter 30.

Referring to FIGS. 1-4, the burlet 16 includes a burlet chamber 32 having a platform 34 supporting a parenteral fluid filter 36 at its outlet end and an inlet assembly 38 at its inlet end. I'm here. The inlet assembly 38 includes a main liquid inlet 14 of conventional construction, an injection site 40 of conventional construction,
and a novel rotatable air valve 42.

Air valve 42 is shown in detail in FIGS. 4-6. As shown, the air valve includes an upright annular stationary port 44 that is integrally formed with the base 46 of the inlet assembly 38 in the illustrated embodiment. Port 44 is connected to central member 48
, and the member has an axial bore 50 . Port 44 has a shoulder 52 as a means of supporting air filter 54. Air filter 54 is preferably circular and sized to fit securely into a seating position on shoulder 52.

Within the interior wall 55 of the port 44 is a pressure-fit fitting 56 having an open interior portion 58 and closing the port 44 to the exclusion of a passageway 60. A passageway 60 is formed in the top 62 of the fitting 56 and is gradually smaller than the open inner portion 58.

The outer wall 64 of the fitting 56 is connected to the inner groove 68 of the pivotable closure 70 to pivotally connect the pivotable closure 70 to the stationary fitting 56.
a circular flange 66 cooperating with the flange 66;

A pivotable closure 70 extends downwardly and out of port 44 with a top wall 72 having an opening 74 for communicating with passageway 60 when the closure is pivoted to a predetermined open position. annular wall 76
including. Sidewall 76 provides a relatively tight fit between the inner surface of sidewall 76 and the outer surfaces of fitting 56 and port 44 when pivotable closure 70 is fitted onto fitting 56 . Dimensioned to exist. However, the connection is such that the rotatable closure 70 connects the stationary port 44 and the fitting 5.
It can be rotated with respect to 6.

The rotatable closure 70 also has a raised portion 78 having an arc 80 for accommodating an elastic ball 82, which is an elastic member. Resilient ball 82, preferably a silicone rubber sphere, is a blocking means used to seal passageway 60 when closure 70 is not in its predetermined closed position. Obturator 70 also includes a radially extending graspable handle 84 to allow the operator to easily rotate the obturator.

As shown in FIGS. 5 and 6, the fitting tool 56
includes a groove 86 with a slope 88 that reaches the top of the passageway 60. As shown in FIG. 5, when closure 70 is in its predetermined open position, ball 82 lies within groove 86 and opening 74 is in line with passageway 60. Arc 80 and groove 86 are dimensioned so that ball 82 is not in compression in the position shown in FIG. Obturator 70
When the handle 84 is rotated so that the handle 84 is not in its predetermined open position, the ball 82 will move to seal the passageway 60 as shown in FIG. In this position ball 82 is under compression to form an effective seal.

By using the structure described above, a highly effective rotatable air valve is provided. The rotatable closure is securely and rotatably connected to the stationary part;
The use of a silicone lubricant to provide adequate sealing is unnecessary, and if the air filter 54 becomes clogged, the filter lies directly beneath the passageway 60 so that it can be removed, at least partially. A needle can be inserted through the opening 74 and passageway 60 to unclog it.

As shown in FIG. 3, a stop member 90 is connected to the assembly to limit the rotational movement of the obturator 70, and a stop member 92 is connected to the assembly to limit the rotational movement of the obturator 70 in the opposite direction. provided.

While illustrative embodiments of the invention have been illustrated and described, it should be understood by those skilled in the art that various modifications and substitutions can be made without departing from the novel spirit and scope of the invention.

[Brief explanation of drawings]

1 is a front view of a dosing set according to the invention, FIG. 2 is a partially cut-away front view of the barrel, FIG. 3 is a plan view of the barrel, FIG. 4 is a sectional view of the barrel, and FIG. 5 is shown in the open position. An enlarged partial cross-sectional view of an air valve; FIG. 6 is an enlarged partial cross-sectional view of the air valve in the closed position; 16: Billet, 18: Dripping chamber, 24: Injection site, 32: Billet chamber, 14: Main liquid inlet, 4
2: Air valve, 44: Stationary port, 54: Air filter, 60: Passage, 56: Fitting device, 70: Closure device, 74: Opening, 82: Elastic ball, 84: Handle, 86: Slanted groove, 80: arc.

Claims (1)

Claims: 1. A medical dispensing device having a chamber and a stationary port extending from a wall of the chamber and having a throughbore, the stationary port having a fitting having an open interior portion. supporting, the top of the fitting includes a passageway, the fitting closing the stationary port except for the passageway, the passageway being substantially smaller than the open inner portion, and an air filter lying directly below the passageway across the bore of the stationary port; further comprising a pivotable closure overlying and pivotally connected to the stationary port; A pivotable closure has an opening for communicating with the passageway when the closure is pivoted to a predetermined open position, and an opening in the closure for communicating with the passageway when the closure is in its closed position. means for isolating the passageway from the user, the isolating means comprising a resilient member movable with rotational movement of the obturator to close and seal the passageway when the obturator is not in a predetermined open position; , wherein the fitting is sized and shaped to compress the resilient member while the resilient member closes and seals the passageway. 2. The stationary port is comprised of an open annular member and a separate fitting secured to the open annular member, and the rotatable connection is comprised of the separate fitting and the rotatable closure. and a circular flange and cooperating groove structure, wherein one of the fitting and closure has a circular flange and the other of the fitting and closure has a cooperating groove. A device according to claim 1 formed herein. 3. The pivotable closure includes a handle that allows for manual grasping, and the closure and the stationary port are rigid to prevent an operator from removing the closure from the stationary port. Claim 1 or 2 having a rotatable connection
Sectional equipment. 4. Apparatus according to any one of claims 1 to 3, wherein said stationary port has support means for housing and supporting said air filter. 5. The device of claim 1, wherein the resilient member is a ball supported by the closure and spaced from the aperture in the closure. 6. The device of claim 5, wherein the fitting includes an angled groove for accommodating the ball when the closure is pivoted to its predetermined open position. 7. The device of claim 5, wherein the ball is a silicone rubber sphere. 8. The sloping groove is capable of placing the ball under non-compression when the closure is in its predetermined open position and causing the ball to rise along the slope when the closure is rotated to the closed position. 7. The device of claim 6, wherein the device is shaped and dimensioned to allow the ball to be placed under pressure and to seal the passageway when the closure is in the closed position. 9. The opening of the closure is located so as to lie directly above the passageway when the closure is in its predetermined open position.
Apparatus according to any of paragraphs 8 through 8.