Opsens Inc.

Other

Fiso Technologies Inc.

Claude Belleville

Alain Proulx

Sébastien Lalancette

Richard Van Neste

Daniel Nahon

Marwane Berrada

Gaétan Duplain

Étienne Côté

Daniel Pronovost

Sylvain Bussière

Olivier Bataille

Steve Arless

MengChe Looi

Nicolas Lessard

Sebastien Lalancette

André Lachance

Sylvain Bussiere

Alain Proulz

Philippe Lafleur

Jean-Sebastien Mercier

Mengche Looi

There is described a pressure guidewire. It comprises a sensor housing and a sensor assembly embedded in the sensor housing and comprising a pressure sensor. There is a band to support the pressure sensor assembly, the band being embedded inside the sensor housing and fixed to the pressure sensor assembly for holding the pressure sensor inside the sensor housing.

Guidewire with internal pressure sensor

There is described a method for calculating a patient-specific hemodynamic parameter. The method comprises measuring at least one pressure measurement in an artery using an intravascular pressure measurement device, and taking at least one medical image of the artery from a medical imaging instrument, the at least one medical image of the artery being synchronous with the at least one pressure measurement. Both the pressure measurement and the medical image are fed to a computing system to calculate a flow from the at least one medical image, to calculate parameters of the artery from at least two artery pressure drops and corresponding flow components, and based on the flow and the parameters of the artery, to calculate a patient-specific hemodynamic parameter or a plurality thereof.

Hybrid image-invasive-pressure hemodynamic function assessment

The present document describes a pressure guidewire. It comprises a shaft tube having a proximal section configured to provide pushability to the pressure guidewire; a middle section extending distally relative to the proximal section, the middle section comprising a cut pattern configured to provide greater flexibility in the middle section than the proximal section; and a sensor housing section extending distally relative to the middle section. The pressure guidewire further comprises an inner hypotube comprising a proximal end portion and a distal end portion, the inner hypotube positioned entirely radially inward of the shaft tube and within at least the middle section, the proximal end portion and the distal end portion of the inner hypotube being joined to the shaft tube; and a tip pressure sensor positioned in the sensor housing section.

The present document describes a pressure guidewire. It comprises a shaft tube having a proximal section and a sensor housing having a distal end, the proximal section and the sensor housing being the continuity of the same shaft tube. A fiber optic pressure sensor is embedded in the sensor housing and comprises an optical fiber extending within the sensor housing, the sensor adapted to measure a pressure of a fluid which is substantially applied in an axis collinear with the longitudinal axis of the guidewire. A marker band, to help in localizing the pressure guidewire in a patient's vessels, is embedded inside the sensor housing and fixed to the optical fiber for holding the pressure sensor inside the sensor housing.

The present document describes a system for equalizing the pressure of a pressure guidewire against the pressure of an aortic pressure device: the system comprising two methods of equalizing the pressure against each other, one method that involves a gain adjustment and another method that involves the addition of an offset; the method further comprising a method for detecting which method should be applied to the situation, the detecting methods including: the contribution of the operator; an algorithm detecting the first equalization from subsequent post procedure equalizations, the algorithm including various factors such as incrementing the equalization requests, measuring the elapsed time and others.

Method for pressure guidewire equalization

The present document describes a pressure guidewire comprising: a shaft tube with a proximal section; a middle section extending from the proximal section of the shaft tube, the middle section having greater flexibility than the proximal section; an inner hypotube installed substantially within the middle section for optimal mechanical properties; a pressure sensor with a communication means routed through the middle section and the proximal section; and a sensor housing for receiving the pressure sensor. There are also described methods for joining the inner hypotube to the shaft tube.

The present document describes a pressure guidewire comprising a shaft tube, a tip portion and a fiber optic pressure sensor. The shaft tube comprises a middle section and a sensor housing extending distally relative to the middle section, the sensor housing having a distal end. The tip portion extends distally relative to the shaft tube. The pressure sensor is embedded in the sensor housing. The sensor housing defines a cavity, inside the sensor housing, which is distal relative to the pressure sensor and delimited at a proximal end thereof by the pressure sensor.

The present document describes an interface connector handle for connecting a first optical fiber to a second optical fiber. The first optical fiber is substantially centered within a proximal portion of a guidewire tubing. The second optical fiber is routed through and extending from an optical interface cable. The interface connector handle comprises a biasing assembly for urging one of the first optical fiber and the second optical fiber toward the other one of the first optical fiber and the second optical fiber resulting in a contact therebetween.

Interface connector handle for disposable guidewire optical connection

There is described a method for terminating an optical fiber within a proximal portion of a guidewire tubing. The guidewire tubing has an outside diameter and comprises a lumen. The method comprises centering the optical fiber relative to the outside diameter of the proximal portion of the guidewire tubing. The optical fiber and the inside of the lumen define an average gap there between. The average gap around the optical fiber is between 1 &#x3bc;m and 100 &#x3bc;m for allowing a substantial displacement of the optical fiber inside the lumen during the centering.

Method for disposable guidewire optical connection

The present document describes a female optical receiving device for connecting a first optical fiber to a second optical fiber. The first optical fiber is substantially centered within a proximal portion of a guidewire tubing. The female optical receiving device comprises a first ferrule or tubing having a longitudinal axis and an inside diameter adapted to an outside diameter of the guidewire tubing, and a second ferrule or tubing having a longitudinal axis and an inside diameter adapted to an outside diameter of the second optical fiber. The longitudinal axis of the first ferrule or tubing is aligned with the longitudinal axis of the second ferrule or tubing.

Female optical receiving device and method

A method for terminating a first optical fiber within a proximal portion of a guidewire tubing. The guidewire tubing has an outside diameter defined as having a tolerance of &#xb1;0.001&#x2033; or less. The method comprises the step of centering the first optical fiber within the guidewire tubing. A female optical receiving device used to receive an optical guidewire and connect guidewire internal optical fiber to an external relaying optical cable is also provided.

There is described a miniature fiber optic pressure sensor design where sensitivity around specific biased pressure is optimized. In an embodiment, the pressure sensor is a Fabry-Perot (FP) sensor which comprises a substrate; and a diaphragm mounted on the substrate. The diaphragm has a center and comprises: a first layer comprising a first material; and a second layer comprising a second material. The second layer forms a dot or a ring. The dot or ring is mounted on the first layer and is centered about the center of the diaphragm. The second material comprises internal pre-stresses to cause the center of the diaphragm (in the case of a dot) or the peripheral area about the center of the diaphragm (in the case of a ring) to camber away from the substrate upon relaxing the internal pre-stresses.

Miniature high sensitivity pressure sensor

The present invention provides an optical sensor for monitoring current or power in a monitored element of a device such as a bridge-wire or hot-wire of electro-explosive devices. The optical sensor comprises an optical sensor made of semiconductor material. The semiconductor material comprises an absorption edge which is sensitive to a temperature variation. The semiconductor material is for placing in thermal contact with the monitored element of the device, whereby, when the current or power varies in the monitored element, it causes a variation in temperature in the semiconductor element and hence a spectral shift of the absorption edge which can be measured and which is representative of current and power variation.

Optical sensor for monitoring electrical current or power

The invention provides a miniature robust fiber optic pressure sensor. The miniature fiber optic sensor comprises a Fabry-Perot chip bonded to an optical fiber. The invention provides a new sensor design that reduces the amount of adhesive required to bond the optical fiber to the Fabry-Perot sensor such that the sensor is less sensitive to moisture. The invention also provides manufacturing methods of the sensor comprising a method based on etching and a method based on using an excimer laser. The invention also provides a chip design that renders the chip less sensitive to thermal changes. The invention also provides a chip design in which a sensor diaphragm has a well-defined thickness. The invention also provides a chip design that protects the chip from etching.

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Québec, Canada

Claude Belleville