摘要:
A balloon anchor for use with an endoscopically inserting ultrasound probe having an ultrasound transducer element accommodated in an ultrasound scanner head at the fore distal end of a flexible cord to be placed in an endoscopic biopsy channel. The balloon anchor includes an anchor tube which is adapted to be fitted in the endoscopic biopsy channel in such a way that it is partly projected from fore distal end of the endoscopic biopsy channel. Connected to the projected fore end of the anchor tube is a balloon support member of a larger diameter as compared with the endoscopic biopsy channel. A passage of a large diameter is formed axially through the anchor tube and through the balloon support member. A balloon stopper portion is provided on the outer periphery of the balloon support member to anchor a resilient ring of a balloon therein.
摘要:
A coupling adaptor for electrically and rotationally coupling a tail end connector of an endoscopically inserting ultrasound probe with a connector portion of a separate probe control unit. The coupling adaptor is intended for use with an endoscopically inserting ultrasound probe having a bulky ultrasound scanner assembly at the nose end of a flexible cord, and a thin and narrow tail end connector at the proximal end of the flexible cord for passage through a biopsy channel of an endoscope. The coupling adaptor is provided with, within a stationary housing, a pair of rotationally interconnected front and rear rotary members to be disconnectibly coupled with the tail end connector of the ultrasound probe and a rotational drive means on the probe control unit, respectively. The front and rear rotary members of the coupling adaptor internally carry electrical connection means to establish electrical connections between the ultrasound probe and the probe control unit when coupled therewith to transmit rotation from the rotational drive means on the probe control unit to an ultrasound transducer element on the ultrasound scanner assembly provided at the distal end of the flexible cord of the ultrasound probe.
摘要:
An ultrasound probe coupler for electrically and rotationally coupling an ultrasound probe with a probe control unit of an ultrasound examination system. The probe coupler essentially includes a tail end connector provided at the tail end of a flexible cord to be connected to the probe control unit. The tail end connector is provided with a stationary ring which is fixedly connected to a tail end portion of the flexible cord, and a rotational coupler having a series of rotary rings, including at least one electrode ring, for coupling the flexible shaft with a rotational drive means and an electrode on the part of the probe control unit. The rotational coupler further includes a rotation transmission member detachably connected to one of the rotating electrode rings and projected radially outward of the inner periphery of the stationary ring for engagement with a rotational drive member on the part of the probe control unit.
摘要:
An ultrasound transmission medium feed device particularly for an endoscopically inserting ultrasound probe adapted to be introduced into a body cavity through and under the guidance of one of biopsy channels provided on an endoscope. The ultrasound transmission medium feed device essentially comprises: a balloon fitted on a base end portion of an ultrasound scanner head fixedly in a hermetically sealed state in such a way as to wrap in an end housing of the scanner head; a fluid inlet-outlet passage provided on the base end portion of the ultrasound scanner head for charging and discharging an ultrasound transmission medium into and out of the balloon through a communicating port; and a pressurizing feed tube adapted to be placed in another biopsy channel of the endoscope and disconnectibly connectible at a fore distal end portion thereof with the fluid inlet-outlet passage on the ultrasound scanner head, the pressurizing feed tube having a pressurizing member in association with a proximal end portion thereof for pressurizing or depressurizing the ultrasound transmission medium to be supplied to the inlet-outlet passage on the ultrasound scanner head of the probe.
摘要:
A stopper mechanism for an endoscopically insertable ultrasound probe which is designed to be introduced into a body cavity through a biopsy channel provided internally of an insertion instrument of an endoscope and which is of the type having a bulky ultrasound scanner head at the distal end of an elongated thin flexible cord and being placed in the endoscopic biopsy channel except the bulky scanner head when in use. A stopper protuberance is projected radially outward from a connecting neck portion of the ultrasound probe immediately on the proximal side of the scanner head where the flexible cord of the ultrasound probe is connected to a connecting member axially extended from the ultrasound scanner head. The stopper protuberance is abutted against marginal edges of a front opening of the endoscopic biopsy channel at a distal end of the endoscopic insertion instrument prior to the scanner head when the flexible cord is pulled thereinto, thereby keeping the scanner head from loads which would be imposed thereon upon direct abutment against a distal end portion of the endoscopic insertion instrument. The stopper protuberance can be realized in various forms, including an annular protuberance formed on the circumference of an outer tube of the flexible cord or of the connecting member in the connecting neck portion, and a wedge ring fitted on a fore end portion of the outer tube.
摘要:
An ultrasound inspection apparatus detachably connected to an endoscope comprises an ultrasonic scanning portion in the front-end side having an ultrasound transducer for performing ultrasonic scanning by arranging a number of transducer chips in a rectangular arrangement. The ultrasonic scanning portion is detachably attached to a distal end portion of an insertion unit in the endoscope so as to protrude ahead the distal end portion by a predetermined length. In order to hold the ultrasonic scanning portion in a fixed state, an endoscope-placing portion for placing the distal end portion is connected to the base end of the ultrasonic scanning portion, and an endoscope-fixing portion for detachably fixing the distal end portion thereto is arranged with the endoscope-placing portion. A predetermined number of wires connected to each transducer chip is inserted into a signal cable from a base end position of the endoscope-placing portion so as to bundle the wires.
摘要:
An ultrasonic transducer (20) is enclosed by a cap (19). Inside of the cap (19) is filled with liquid paraffin (25). The liquid paraffin (25) has a maximum molecular weight M1 of 520 ≦M1≦1400, a peak top molecular weight M2 of 230≦M2≦380, and a kinematic viscosity S (mm2/s) of 4≦S≦12.5 at 40° C. This liquid paraffin (25) achieves deeper penetration of the ultrasonic waves into biological tissues and higher receiver sensitivity to the echoes of the ultrasonic waves across a broad frequency range.
摘要:
The ultrasonic probe has an ultrasonic transducer for sending and receiving ultrasonic waves, and a cap covering the ultrasonic transducer. The ultrasonic transducer scans a living organism with the ultrasonic waves passing through the cap. A meshed area having plural holes is provided in a portion of the cap for transmitting the ultrasonic waves. By reducing a density interval (pitch of the holes) below a wavelength of the ultrasonic wave, an acoustic impedance of the meshed area is reduced. Water flows into the cap from a sheath, and then flows outside the cap through the holes. A concave can be alternative to the hole. In addition, the pitch of the holes or concaves may be uneven in the meshed area, so as to give an acoustic lens effect to the cap.
摘要:
An ultrasonic endoscope comprises an insertion portion comprising a distal hard portion which has: an endoscopic observation unit; and an ultrasonic observation unit having ultrasonic transducers arranged circumferentially on an outer circumferential section of the distal hard portion, wherein the ultrasonic observation unit comprises an ultrasonic-wave transmission/reception unit having an tunnel-shaped path which has an inner circumferential surface formed as a backing layer; a distal block is arranged on a distal side in an axial direction of the distal hard portion with respect to a location where the ultrasonic-wave transmission/reception unit is arranged, and distal ends of respective members constituting the endoscopic observation unit are fixed to the distal block; and part of the members which constitute the endoscopic observation unit are fitted so as to be partially protruded from an inside diameter of the tunnel-shaped path toward an outer circumferential side thereof.
摘要:
An ultrasonic endoscope comprises an insertion portion comprising a distal hard portion which has: an endoscopic observation unit; and an ultrasonic observation unit having ultrasonic transducers arranged circumferentially on an outer circumferential section of the distal hard portion, wherein the ultrasonic observation unit comprises an ultrasonic-wave transmission/reception unit having an tunnel-shaped path which has an inner circumferential surface formed as a backing layer; a distal block is arranged on a distal side in an axial direction of the distal hard portion with respect to a location where the ultrasonic-wave transmission/reception unit is arranged, and distal ends of respective members constituting the endoscopic observation unit are fixed to the distal block; and part of the members which constitute the endoscopic observation unit are fitted so as to be partially protruded from an inside diameter of the tunnel-shaped path toward an outer circumferential side thereof.