Tensys Medical, Inc.

Ivac Corporation

Shangyi Medical Technology (hangzhou) Co., Ltd

Shanyi Medical Technology (hangzhou) Co., Ltd.

Simon E Finburgh

Russell D Hempstead

Andrew S Katayama

Mark W Perona

Anthony T Butler

Kurt Blessinger

Ronald J Vidischak

Gregory I Voss

Matthew G Morris

William H Markle

Ronald S Conero

Alvis J Somerville

Eric A Warner

Kenneth A Beckman

Spyros Kasvikis

James E Dikeman

Richard W Herrmann

Stephen R Hessel

Improved apparatus and methods for non-invasively assessing one or more hemodynamic parameters associated with the circulatory system of a living organism. In one aspect, the invention comprises an apparatus adapted to automatically and accurately place and maintain a sensor (e.g., tonometric pressure sensor) with respect to the anatomy of the subject. The apparatus comprised of a sensor device removably coupled to an actuator which is used to position the sensor during measurements. Methods for positioning the alignment apparatus and sensor, and operating the apparatus, are also disclosed.

Apparatus and methods for non-invasively measuring a patient's arterial blood pressure

Improved apparatus and methods for non-invasively assessing one or more hemodynamic parameters associated with the circulatory system of a living organism. In one aspect, the invention comprises spatially compact 'bracelet' embodiment adapted to accurately place and maintain a sensor (e.g., tonometric pressure sensor) with respect to the anatomy of the subject, including an optional alignment apparatus which moveably captures the sensor to, inter alia, facilitate coupling thereof to an actuator used to position the sensor during measurements. The alignment apparatus also advantageously allows the sensor position to be maintained when the fixture is removed from the subject, such as during patient transport. A completely autonomous variant of the bracelet apparatus having internal power supply and wireless interfaces is also disclosed. Methods for positioning the alignment apparatus and sensor and providing treatment to the subject are also described.

Compact apparatus and methods for non-invasively measuring hemodynamic parameters

Apparatus is disclosed for non-invasively monitoring a subject's blood pressure, in which a pressure sensor assembly that includes a pressure transducer is compressed against tissue overlying an artery, with sufficient force to compress the artery. A motor first servo control system optimizes the amount of artery compression, which occurs at a mean transmural pressure of about zero, by modulating one side of a lever arm compressing the assembly against the tissue, creating a pressure signal indicative of transmural pressure. Since different pressure effects are realized according to the amount of artery compression, an appropriate control signal can be produced that provides for a second motor to adjust the other side of the lever arm to provide the optimum compression of the assembly into the tissue overlying the artery. The apparatus is optimally positioned over an artery by including an ultrasonic blood flow sensor configured to sense the flow of blood under the pressure transducer.

Apparatus and method for non-invasively monitoring a subject's arterial blood pressure

An air-in-line sensing apparatus for use with a parenteral fluid administration set to detect the passage of air through a fluid conduit. The apparatus comprises a first housing having a first arcuate section mounting a first transducer adjacent the first arcuate section and a second housing having a second arcuate section mounting a second transducer adjacent the second arcuate section. One housing is independently movable relative to the other housing so that when the movable housing is moved towards the other housing, the first and second arcuate sections capture a length of administration set tubing therebetween providing secure intimate contact therewith. A signal may be generated from one of such transducers, passed through the fluid conduit and received by the other transducer to detect whether the conduit is carrying air.

Air-in-line sensing apparatus

A fluid flow control system having a valve disposed in-line with a fluid conduit extending between a fluid container and a fluid receiver. The conduit and valve are designed to be used with a fluid infusion device such as a peristaltic pump. The valve is non-clamping and includes a rotatable member with an external handle for controlling the valve between flow and flow stop positions. The handle can be manually operated as well as automatically operated. Mounted to the infusion device is an automatic operating mechanism for cooperating with the pumping mechanism of the infusion device to control the position of the valve. In a disclosed embodiment, the operating mechanism is mounted to an access door of the pump which cannot be closed until the peristaltic mechanism is engaged with the tubing. When the door is closed, the operating mechanism automatically moves the valve to the flow position. When the access door is opened, the mechanism automatically moves the valve to the flow stop position. The pumping mechanism cannot be disengaged from the tubing without first opening the access door, which automatically closes the valve as described above. In one embodiment, the access door includes a retractor arm and a block for selectively operating the valve handle.

Automatic flow control valve system

An air-in-line sensor is provided comprising an adapter for insertion in the fluid line and a sensor housing. The adapter is semi-compliant and includes convex-shaped acoustic coupling surfaces for engaging the straight and rigid transducer sensing walls of the housing. The convex surfaces of the adapter have a larger diameter than the distance between the housing sensing walls and an interference fit results. Due to this interference fit, the shape of the coupling surfaces, the varying thicknesses of the adapter walls and the difference in compliance of the materials of the adapter and the housing, a more uniform contact pressure profile is provided. The upper part of each sensing channel wall in the housing includes a ledge which wipes contaminants from the coupling surfaces of the adapter as it is inserted into the sensor channel of the housing. The inner passage of the adapter in the sensing section is tapered and this shape resists bubbles which may otherwise tend to adhere to the interior surface of the adapter and be detected by the transducers.

Air-in-line sensor

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San Diego, CA, United States of America

Simon E Finburgh