Sophysa

Philippe Negre

Christophe Moureaux

Olivier Bonnal

Christophe Boyer

Jean-Philippe Lemaitre

Sylvain Morel

François Cabaud

Pascal Coneau

Jean-Philippe Lemaître

A device and associated method for adjusting the opening pressure of an implantable valve. The valve has a rotor of rotation axis, whose angular position determines the opening pressure. The rotor has a rotor micro-magnet movable between positions of locking and unlocking, in which positions the micro-magnet respectively prohibits and permits the rotation of the rotor. The method includes: arranging a locator to align an axis of a locator receptacle with the rotation axis and to orient the locator in an angular position; determining the angular position of the rotor about its rotation axis with respect to the locator; inserting an actuator into the locator receptacle as far as a first insertion depth; partially withdrawing the actuator from the locator receptacle as far as a second insertion depth less than the first insertion depth; rotating the actuator starting from the second insertion depth; separating the actuator from the valve.

Device for adjusting a drainage valve

A drainage valve intended to be implanted and to drain the cerebrospinal fluid, including: a body defining a chamber into which there open an inlet port and an outlet port, a stopper capable of at least partially, or indeed completely, closing off the inlet port, a resilient return member exerting a resilient push force on the stopper towards the inlet port in order to open or close the port, a rotor housed in the chamber, able to rotate about an X-axis pivot and including a cam track on which the resilient return member rests such that the force exerted by the resilient return member on the stopper is modified by the rotation of the rotor.

Adjustable drainage valve

An implantable drainage device for draining the cerebro-spinal fluid of a patient, the device including:

Method of regulating CSF drainage

A device for mechanically locating and reading the setting of an adjustable magnetic valve for controlling the flow of a fluid in a predetermined direction (D) comprises a magnetic compass () and a selector () provided with an alignment mark () for aligning the magnetic compass () with respect to the direction (D) in which the fluid flows through the valve (V). The compass () comprises a reference plane and a magnetic indicator () which is mounted such that it can pivot in all three dimensions of space under the effect of the magnetic field of the valve, the valve setting being represented by the angle (&#x3b2;) formed, in the reference plane, between the magnetic indicator () and the alignment mark () when the magnetic indicator () is positioned perpendicular to the reference plane, the magnetic compass then being centered on the magnetic center of the valve.

Device and method for mechanically locating and reading the setting of an adjustable valve

The invention is aimed at improving valve pinpointing and reading devices by proposing to activate a magnetic detection source allowing measurements regularly-distributed in a circle around an axis at predetermined measurement positions. An exemplary locator comprises a casing () provided with a mechanism for detecting and analyzing the magnetic field of the magnetic dipole of the valve. It comprises:&#x2014;a magnetic detection source () able to detect and measure the magnetic field of the magnetic center of the valve at predetermined measurement positions distributed in a circle around an axis (X-X'), linked to&#x2014;a microprocessor () for analyzing the measurements and for generating detection signals.

Locator, device and method for electronically locating and reading the setting of an adjustable valve

The present invention relates to a drainage device comprising:

Drainage system for treating hydrocephalus

The invention proposes a device for mechanically locating and reading the setting of an adjustable magnetic valve for controlling the flow of a fluid in a predetermined direction to locate the magnetic centre of the valve and to determine the setting of the valve. The device comprises a magnetic compass (), an alignment mark for aligning the magnetic compass () with respect to the direction in which the fluid flows, a reference plane (Pr), and a magnetic indicator (), which is mounted such that it can pivot in all three dimensions of space under the effect of the magnetic field of the valve. The magnetic indicator () includes at least one magnet capable of receiving a magnetic field and having a north-south direction, wherein the north-south direction is substantially perpendicular to the reference plane (Pr) when the magnetic indicator () is positioned substantially perpendicular to the reference plane (Pr).

Device for mechanically locating and reading the setting of an adjustable valve

A subcutaneous valve having a body defining a chamber and including an inlet orifice and an outlet orifice opening out into the chamber, a shutter member suitable for closing the inlet orifice, at least in part, a resilient return member configured to hold the shutter member against the inlet orifice to regulate the passage of liquid through said inlet orifice, and a rotor housed in the chamber having a cam-forming surface, the resilient return member bearing against the cam-forming surface of the rotor by forming a moving contact with this surface.

Subcutaneous valve

A subcutaneous vane for the external regulation of fluid flow, said valve including a body comprising a substantially cylindrical and flat internal chamber having a central axis; an inlet pipe and a drain pipe formed in the lateral wall of said chamber and adapted to be connected respectively to a catheter for supplying a fluid and to a catheter for draining a fluid from said chamber; a rotor mounted in said chamber to rotate about said central axis; a non-return valve formed at the inner end of the inlet pipe and having a moveable valve element and a valve seat, said moveable valve element closing said valve when the valve element is engaged in the valve seat; a curved leaf spring fixed to said rotor generally parallel to the lateral wall of the chamber and urging the valve element into the valve seat; two micromagnets mounted in spaced relation in the motor on opposite sides of said central axis; locking means for locking the rotor in predetermined selected positions; the micromagnets being mounted to move linearly in said rotor in a substantially radial direction to actuate said locking means; whereby said locking means cannot be altered by strong external unidirectional magnetic fields and whereby said locking means can be locked only by a specifically applied bidirectional magnetic field.

Growing community of inventors

Paris, France

Philippe Negre