摘要:
An endoscopic delivery system is provided to deliver a functional device through the esophagus and into the stomach where it is attached the stomach wall. The endoscopic instruments attach or remove the attachment devices and functional devices from the stomach and may be used to assist in determining the optimal attachment location.
摘要:
A device, system and method for diagnosing and treating gastric disorders is provided. A functional device resides within the patient's stomach and is secured to the stomach wall by an attachment device. The functional device may be a sensor for sensing various parameters of the stomach or stomach environment, or may be a therapeutic delivery device. The functional device in one embodiment provides a device, system and method for gastric electrical stimulation where stimulating electrodes are secured to the wall of the stomach by the attachment device or otherwise. A preferred device includes: at least one stimulating electrode in electrical contact with the stomach wall; an electronics unit containing the electronic circuitry of the device; and an attachment mechanism for attaching the device to the stomach wall. The functional devices may be programmed to respond to sensed information or signals. An endoscopic delivery system delivers the functional device through the esophagus and into the stomach where it is attached the stomach wall. The endoscopic instruments attach or remove the attachment devices and functional devices from the stomach and may be used to assist in determining the optimal attachment location.
摘要:
A device, system and method for diagnosing and treating gastric disorders is provided. A functional device resides within the patient's stomach and is secured to the stomach wall by an attachment device. The functional device may be a sensor for sensing various parameters of the stomach or stomach environment, or may be a therapeutic delivery device. The functional device in one embodiment provides a device, system and method for gastric electrical stimulation where stimulating electrodes are secured to the wall of the stomach by the attachment device or otherwise. A preferred device includes: at least one stimulating electrode in electrical contact with the stomach wall; an electronics unit containing the electronic circuitry of the device; and an attachment mechanism for attaching the device to the stomach wall. The functional devices may be programmed to respond to sensed information or signals. An endoscopic delivery system delivers the functional device through the esophagus and into the stomach where it is attached the stomach wall. The endoscopic instruments attach or remove the attachment devices and functional devices from the stomach and may be used to assist in determining the optimal attachment location.
摘要:
An aspiration needle apparatus for collecting cell samples from tissue comprising a vacuum container having an enclosed evacuated space evacuated to a subambient pressure and sealed by a penetrable diaphragm. An adapter has a recess to receive the vacuum container. A needle is carried by the adapter and has a distal extremity serving as an aspiration needle to collect the cell sample and has a proximal extremity disposed in the recess and is capable of penetrating the diaphragm of the vacuum container to couple the evacuated space to the flow passage of the needle to supply a subambient pressure to the distal extremity of the needle. An on-off mechanism carried by the adapter includes yieldable means and a member mounted in the recess actuatable by axial movement of the vacuum container into the recess against the force of the yieldable means disposed within the recess. The on-off mechanism also includes means secured to the member for sequentially retaining the member in a rearwardmost or at rest position and a forwardmost or latched position whereby in the forwardmost or latched position the needle means penetrates the diaphragm to supply the subambient pressure in the vacuum container to the needle means and in the rearwardmost or at rest position the needle means is free of the diaphragm so that the subambient pressure is no longer supplied to the needle means.
摘要:
A guide wire having a distal extremity with an adjustable support characteristic comprising a core wire having proximal and distal extremities. The distal extremity has a reduced cross sectional area which is more flexible than the proximal extremity. A tip secured to the distal extremity of the core wire. A sleeve of superelastic material is disposed coaxially on the distal extremity of the core wire. The sleeve is annealed so that it is relatively flexible at a temperature ranging from 20.degree. to 40.degree. C. and becomes progressively stiffer as temperature increases. The core wire conducts electrical energy to the superelastic sleeve to supply heat to the sleeve and extends from the proximal extremity of the core wire to the sleeve to cause the sleeve to become stiffer to thereby increase the stiffness of the distal extremity of the guide wire. A guide wire is provided having a distal extremity with an adjustable support characteristic which varies from a floppy characteristic to a stiff characteristic.
摘要:
A low profile catheter comprising a flexible elongate tubular member having proximal and distal extremities and having a guide wire lumen and at least one balloon inflation lumen extending from the proximal extremity to the distal extremity, said at least one balloon inflation lumen being offset eccentrically with respect to said guide wire lumen, the distal extremity of said flexible elongate tubular member having at least one inflatable balloon formed thereon and having an interior in communication with said at least one balloon inflation lumen, said guide wire lumen extending through said at least one inflatable balloon and being offset eccentrically with respect to said at least one inflatable balloon.
摘要:
A guide wire having a distal extremity with an adjustable support characteristic including a core wire having proximal and distal extremities. The distal extremity has a reduced cross sectional area which is more flexible than the proximal extremity. A tip is secured to the distal extremity of the core wire. A sleeve of superelastic material is disposed coaxially on the distal extremity of the core wire. The sleeve is annealed so that it is relatively flexible at a temperature ranging from 20.degree. to 40.degree. C. and becomes progressively stiffer as temperature increases. The core wire conducts electrical energy to the superelastic sleeve to supply heat to the sleeve and extends from the proximal extremity of the core wire to the sleeve to cause the sleeve to become stiffer to thereby increase the stiffness of the distal extremity of the guide wire. A guide wire is provided having a distal extremity with an adjustable support characteristic which varies from a floppy characteristic to a stiff characteristic.
摘要:
Guide wire for use in a medical procedure and for use with the power supply comprising a flexible elongate tubular member having proximal and distal extremities and having a bore extending from the proximal extremity to the distal extremity. A core wire extends through the bore of the flexible elongate tubular member. A coil assembly is mounted on the distal extremity of the flexible elongate member and has a distal extremity. A rounded tip is formed on the distal extremity. An actuator member has at least a portion thereof disposed in the coil assembly and has proximal and distal extremities. The proximal extremity of the actuator member is secured to the distal extremity of the flexible elongate tubular member. The distal extremity of the actuator member is secured to the rounded tip. The actuator member has a portion thereof formed of a shape memory material and incorporating a shape member therein. A heater is disposed in the vicinity of said portion of the actuator member for heating said portion to cause it to assume the predetermined shape memory. Electrical conductors are connected to the heater and extending to the proximal extremity of the flexible elongate tubular member and are adapted to be connected to the power supply to supply energy to the heater.
摘要:
A low profile, balloon-on-a-wire catheter comprising a flexible elongate tubular member having proximal and distal extremities. A balloon inflation-deflation lumen extends from the proximal extremity to the distal extremity. An inflatable balloon is carried by the distal extremity of the flexible elongate tubular member. The flexible elongate tubular member carries means which establishes communication between the lumen and the interior of the inflatable balloon. A removable inflation device is removably secured to the proximal extremity of the flexible elongate tubular member for supplying an inflation fluid to the lumen for inflating and deflating the balloon. The removable inflation device forms a high pressure seal with the proximal extremity of the flexible elongate tubular member. The removable inflation device is free of obstructions so that another balloon catheter can be advanced over the proximal extremity of the flexible elongate tubular member which serves as a stand-alone guide wire. The distal extremity of the catheter is formed so that it is mechanically shapeable or can be electrically deflectable to facilitate steering of the distal extremity.
摘要:
A sheath for advancement into a vessel of a patient having a stenosis therein which at least partially occludes the flow of blood in the vessel. A flexible elongate tubular member has proximal and distal extremities with a lumen extending from the proximal extremity to the distal extremity. A portion of the distal extremity of the flexible elongate tubular member is radially expandable. The expandable portion carries stiffening elements that impart pushability and column strength to the expandable portion.