Marquest Medical Products, Inc.

Other

Charles D Williams

Donald L Bailey

Knut H Larsen

A tray having a plurality of wells bored or formed therein of predetermined volume for use in a freeze drying process is disclosed. The wells contain a solution of biologicals of predetermined concentration. The tray is thermally configured to maximize freezing efficiency during the lypholization or freeze-drying process. A pledget product is formed by the freeze drying process, the pledget adapted to be used in a single dosage of a predetermined unit value. The pledget can be stored for extended periods of time in a syringe and then be readily utilized in heparinizing an aspirated blood sample.

Tray apparatus for freeze-drying biologicals having a predetermined unit

A syringe for drawing gas-free blood samples is disclosed having a sliding assembly operatively connected to an elongated hollow plunger rod, both the sliding assembly and the plunger rod slideably received within the interior of the tubular body, which is connected to an hypodermic needle. The sliding assembly has longitudinal grooves formed along a portion of the length therein which are in fluid communication with inwardly directed smaller cross section radial channels formed in the sliding assembly. The channels are in further fluid communication with a passageway along the longitudinal axis of the sliding assembly and the hollow elongated plunger. Means for preventing the passage of air back into the syringe once the blood level has reached that position are provided. Means for sealing the blood into the syringe are also provided.

Syringe with means for automatically sealing a blood sample within the

A filter device having a first housing and a second housing clasping therebetween a filter membrane. The housings are domed or convexly-shaped and have cylindrical hubs. A peripheral flange extends radially away from each of said dome-shaped housings and one of the pheripheral flanges has integrally formed thereon a plurality of ribs of predetermined length laying on a circumference of said one peripheral flange at arcuate locations therearound. The filter membrane is of circular configuration having radial projections extending around the circumference thereof. The ribs fit between the projections so that ultrasonic welding melts the ribs and fuses the two housings together, holding the filter membrane therebetween.

Filter device

A syringe device has a hollow tubular body that receives a plunger, having in combination a handle portion rotatable within a sealing member portion, for obtaining gas-free blood samples. After an interior chamber of the syringe body is filled with blood under the influences of an individual's blood pressure, a seal is selectively established to isolate the sample. The syringe body is open at one end to receive the plunger and frictionally receives a hypodermic needle through a cylindrical end element disposed at the other end. A pair of linearatly extending seal interrupters, sliced from the handle portion of the plunger, extend from a position fixed on the handle portion across the sealing member to establish breach points, which in turn allow air communication between the interior chamber and the atmosphere. A pair of grooves disposed longitudinally near the open end of the syringe body retain the seal interrupters and prevent permanent indentations from forming in the sealing member while in storage.

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Rolling Hills Estate, CA, United States of America

Charles D Williams