Abstract: A method is provided for treating bovine mastitis by applying a porous strippable polymer film containing a medicament to the udders of the bovine.

Abstract: A negative pressure drainage vessel equipped with an interior resilient flexible diaphragm and means for producing a negative pressure on that side of such diaphragm which is proximate a fluid recovery area. The opposite side of the diaphragm is exposed to atmospheric pressure. A progressive rise of fluid level in the container, as may tend to increase the pressure on the negative-pressure side of the diaphragm, is accompanied by an elastomeric contraction "pull-down" or "pull-up" of the diaphragm so as to maintain essentially the negative pressure required for an essentially constant suction condition for a large progressive rise in fluid level. The negative pressure may be increased by periodic application of vacuum as may be effected by an air-evacuation mechanism. A separate, liquid-filled bag may be employed together with an appropriate valving means.

Abstract: A regulator for evacuation systems including hospital aspiration systems, such regulator being inexpensively manufactured and assembled and providing a number of unique features. The subject regulator is designed to be essentially independent of altitude of operation or humidity conditions, may be made discretely or continuously variable, and also is provided with features reducing, if not eliminating, any noise of air drawn into the system for regulation purposes. An important feature of the invention is the provision of one or more metering apertures of reduced cross section such that possible error of observable knob setting is reduced to an absolute minumum, thus eliminating the necessity of mechanical-adjustment calibration. Settings are essentially accurate for all altitudes, humidity conditions, and particular pumping parameters of existing vacuum systems.

Abstract: A syringe device having smaller and larger, coaxially aligned cylinder bores each provided with respective pistons. The larger rearmost piston is in slidable sealing engagement with its bore but is free-floating on the syringe plunger shaft so that as the forward piston is withdrawn the plunger shaft slips centrally through the rear piston. Thus, fluid drawn in by the forward piston is ultimately mixed with any contents of the large cylinder or bore associated with the larger piston. The rearward piston is free to adjust its disposition on the plunger shaft in response to positive fluid pressure existing forwardly thereof. At a predetermined point in the rearward travel of the plunger, during withdrawal strokes, the pistons are linked together by provided structure for enabling simultaneous, corresponding forward travel to eject the combined substances from the over-all syringe construction.

Abstract: A vacuum operated fluid collection bottle including a fluid inlet port and also a vacuum port, with the vacuum port being provided with an improved vacuum shut-off valve provided with an air deflecting baffle. Such baffle is disposed underneath the valve element or valve gate and is spaced therefrom. The purpose for the baffle is to deflect air essentially around the valve gate so that the pressure of onrushing air, due to the imposition of a vacuum condition, will not cause the valve gate to close prematurely. Thus, the valve gate, even though made of lightweight material, will be permitted simply to float upwardly in response to the rise of fluid level within the bottle until an essentially bottle-filled condition is reached, at which point the lightness of the valve gate will be responsive to the reduced pressure area at the vacuum port so as to suck into and tightly seat against the valve seat provided therefor.

Abstract: A pumping syringe and attachment for withdrawing fluids from patients and other objects, wherein the fore part of the syringe is provided with a T-passageway configuration accommodating double check valves which need not be spring loaded. Successive withdrawals of the plunge relative to the barrel of the syringe produces successive withdrawals of respective charges of withdrawn liquid; subsequent, respective depressions automatically change the fluid circuit, via check valve self-adjustment, so that fluid is ejected into a laboratory-type or other container or sump.

Abstract: A fluid-transfer syringe for medical usage wherein, by use of such syringe, fluid matter may be removed from an afflicted area, such as a knee, of a patient. The spring-loaded plunger of the subject syringe is provided with a piston constructed to have an automatic fluid bypass during forward strokes. The piston serves thereby as a double-acting piston for both drawing into the area forwardly of the piston the fluid to be expelled and, simultaneously, pumping previously expelled fluid from the syringe barrel to a provided outlet port.

Abstract: A fluid-transfer syringe for medical usage wherein, by use of such syringe, fluid matter may be removed from an afflicted area, such as a knee, of a patient. The springloaded plunger of the subject syringe is provided with a piston constructed to have an automatic fluid bypass during forward strokes. The piston serves thereby as a double-acting piston for both drawing into the area forwardly of the piston the fluid to be expelled and, simultaneously, pumping previously expelled fluid from the syringe barrel to a provided outlet port.

Abstract: The present invention comprises a vacuum-operated fluid-collection bottle and system including a serially connected tandem system. Dual vacuum bosses for a representative bottle, one being valved, in multiple-boss covers may be used as respective automatic shut-off and tandem-fill means, with the non-applicable boss being releasably capped off. Two of the three conduit portions of the cover may be connected together through appropriate valving system so that either or both may be effective in supplying vacuum communication to the interior of the bottle at selected height levels. Valving means pre-determine maximum fluid height within the bottle, either automatically or by valve adjustment. A representative bottle may include fluid inlet and vacuum ports of differing level-dimension, to aid the lower vacuum port to close off or to conduct outwardly body-fluid while maintaining the inlet port above the bottle fluid level.

Abstract: The present invention comprises a vacuum-operated, fluid-collection bottle having advantageous, canted sealing surfaces between cover and container as well as other improvements including a perforate vacuum fitting, spherical top and bottom, .[.both convex and concave; float valve means incorporated in the vacuum port construction;.]. snap-lock engagement between the cover and container; graduation means for measuring small volumes of collected fluid, and so forth.