Biomedical Dynamics Corporation

Other

Matthew E Bellin

Joseph A Marino

John R Moberg

Joseph A Marino, Jr

Susan Brunsvold

A suction/irrigator surgical instrument comprises a replaceable cartridge containing the entirety of the fluid flow path for the instrument and a reusable flow-control member having trigger-actuated levers for selectively opening and occluding a portion of the fluid flow path when the two members are affixed to one another, in piggy-back fashion, to form a pistol-grip for the instrument.

Suction/irrigation instrument having reusable handle with disposable

Disclosed is a bladderless inflatable cuff comprising an inner compartment defined by a film, said inner compartment being closed except for an opening through which air may enter and exit said compartment, and an outer compartment comprising a loop portion of hook and loop fabric, said outer compartment serving as a container to limit the amount of expansion of said inner compartment when said inner compartment is inflated, and a fastener mounted on said outer compartment for fastening said cuff around a human body portion when in use.

Inflatable cuff

A pressure infusion device for medical applications for applying pressure to a sealed bag of liquid, such as an I.V. bag, in which the pressure gauge is fastened directly in the pressure applying bag which presses against the I.V. bag. The gauge has a movable plunger which moves outwardly from the bag by an amount depending upon the pressure within the bag. The pressure infusion arrangement is designed to be relatively inexpensive so that it can be discarded after being used. There are two forms, one in which the I.V. bag is held against the pressure applying bag by a mesh which is secured to a fabric to form a pocket for the I.V. bag and the pressure applying bag. In the other form, the mesh is secured directly to the edge of the pressure applying bag.

Pressure infusion device

A flow regulator for use in medical apparatus for adjusting the flow of fluid in which there is a valve body with a valve member having a helical flow passage through which the fluid must flow. In order to facilitate quick adjustment of the fluid, the pitch and depth of the groove both progressively change from one end of the flow regulating device to the other, the depth of the groove becoming less as the pitch of the groove becomes finer. The valve member is longitudinally movable with respect to the valve body, and provision is made for adjusting the longitudinal position either by rotation of a threaded valve stem or by longitudinal movement of the valve stem to quickly adjust the flow rate. The helical groove may be either rectangular in cross-section, or V-shaped in cross-section. Suitable means are provided for sealing against leakage through the valve adjusting means.

Apparatus for regulating the flow of fluid in medical apparatus

A flow regulator for use in medical apparatus for quickly adjusting the flow of fluid in which there are coacting male and female threads for adjusting the position of the flow regulating device, a female threaded portion being yieldable. The position of the flow regulating device can be rapidly changed in either direction by exerting pressure on the valve stem to force the yieldable threaded portion outwardly to enable the threads of the male portion to pass over the threads of the female portion. The portion of the flow regulating device can be adjusted more precisely by turning the valve stem in the conventional manner to cause forward or reverse movement of the flow regulating device. The yieldable female threaded portion can either be integral with the main valve body but yieldable with respect thereto, or the yieldable portion may be a separate member yieldably secured to the main valve body by a spring clip or by an elastic band. Sealing means is disposed between the flow regulating device and the threaded portions to prevent the escape of fluid through the threaded portions. The provision of such a yieldable female threaded portion which extends only over a portion of the periphery of the valve body not only has the advantage of enabling quick adjustment of the flow regulating device, but it also enables the valve body to be molded more readily.

Quick action flow regulator for medical apparatus

The open end of a catheter is inserted in the blood vessel of a patient. The catheter is connected by hollow tubing to a physiologic pressure transducer. The tube is filled with an intermediate pressure-transmitting fluid such as a physiologic saline solution. An infusion device between the patient and the transducer constantly flushes the system with a slow flow of fluid. Blood pressure variations are transmitted through the fluid to the transducer, which converts the pressure to electronic information and transmits the information to a monitor for display. Between the infusion device and the transducer is a variable restrictor which damps the pressure waves in the fluid. This restrictor is used to tune the system to eliminate resonant waves, which distort the monitoring reading. In one form, the variable restrictor includes a valve having an orifice, the effective size of which is reduced or enlarged by compressing and releasing a deformable, flexible ring. In another form, the variable restrictor includes a valve which has a valve seat with a flow opening through which the fluid pressure wave passes. To control pressure wave flow through the valve, a valve needle is moved toward and away from a valve seat, which reduces and increases the size of the flow opening.

Growing community of inventors

Burnsville, MN, United States of America

Matthew E Bellin