摘要:
A transesophageal ultrasound probe for imaging internal structures via an imaging element located on the distal end of a rotating endoscope shaft. The probe includes a rotating endoscope having an imaging element mounted on the distal end of the rotating endoscope shaft. The probe also includes a control handle for controlling the imaging controls and a rotation tube that extends through the rotating endoscope shaft and into the control handle. The rotating shaft rotates relative to, and independently of, the control handle. Preferably, the rotating shaft is rotated via a rotation control wheel. The rotation control wheel is fastened or bonded to the rotating tube so that manual rotation of the control wheel causes the rotation tube to rotate, and therefore, the rotating shaft to rotate. Because the rotating endoscope shaft rotates, an imaging element located on, or within, the rotating shaft also rotates.
摘要:
A puncturing needle guide includes a plate-like body whose width diminishes gradually from one end thereof to the other end thereof; a plurality of holes which are formed in an end surface of the puncturing needle guide at one end thereof and through which a puncturing needle can be passed; a single hole which is formed in an end surface of the puncturing needle guide at the other end thereof and through which the puncturing needle can be passed; a hollow that is formed inside the plate-like body and that allows the plurality of holes and the single hole to communicate with one another; and an attachment which is formed along an edge of the plate-like body in a width direction thereof and by which the plate-like body is attached to an ultrasonic probe.
摘要:
An ultrasonic imaging catheter comprises a catheter body having a distal region and proximal region. The distal region has a reduced cross-sectional area compared to that of the proximal region, and the proximal region includes at least two lumens therethrough for accommodating a movable guidewire and a rotatable working element, respectively. The catheter body may be inserted over the movable guidewire, with the guidewire passing through a lumen in the distal region and the guidewire lumen in the proximal region. After positioning the catheter body, the guidewire can be retracted from the distal region and into the proximal region, leaving the lumen in the distal region available for the rotatable working element. Such a construction allows over-the-wire imaging of the catheter while minimizing the width of the catheter in the dital region which remains available for placement of the working element.
摘要:
Adhesive hydrogel films as ultrasound couplants wherein such hydrogels are adhesive on both sides for adhering to an ultrasound probe and to a protective sleeve or probe cover which facilitates acoustic coupling between an object such as between the human body and the active area of an ultrasound probe, thereby eliminating the requirement for coupling gels and fluids within the sleeve or cover.
摘要:
A device for use in placing a non-sterile sensor probe such as an ultrasound scanning transducer in a desired position within a patient. A flexible probe-receiving tube has a closed distal end so that a probe inserted within the tube through an open end located outside the patient is isolated from contact with the interior of the patient's body. The probe-receiving tube is attached to and extends alongside a chest drain tube which supports the probe-receiving tube in a location proximate an organ to be observed. An attached sterile sensor may be attached directly to an interior blood vessel, and sensors such as an ultrasonic sensor, a light emitting sensor, or a multi-function combination sensor may be used in the probe-receiving tube.
摘要:
An ultrasonic probe includes a sheath having a distal end insertable in a body cavity or a lumen, a proximal end having an injection port allowing an ultrasonic wave propagating liquid to be injected through the injection port, and a passage extending from the proximal end to the distal end, a drive shaft, having a distal end and a proximal end, for transmitting a mechanical drive force from the proximal end to the distal end, the drive shaft being disposed in the passage of the sheath, and an ultrasonic transducer provided at the distal end of the drive shaft, wherein a gap between the inner surface of the passage and the outer periphery of the drive shaft on the distal end side of the sheath is smaller than that on the proximal end side of the sheath. Such an ultrasonic probe is advantageous in efficiently discharging bubbles remaining in the sheath with less water flow, and also reducing the diameter of the ultrasonic probe while keeping a high quality of an ultrasonic tomogram.
摘要:
For the purpose of reducing the numbers of members and molds to reduce the cost of manufacture, and improving grippability in an ultrasonic probe, a fixing member 6 fitted with an ultrasonic element 3, a broad cable 4, a connector 5, and a connection cable 2 is inserted into a mold, and an ultrasonic lens portion 11, a case 12, and a bushing portion 13 are integrally molded by insert molding. Since an ultrasonic probe 10 is made using a single mold, the number of members is reduced, the number of assembly steps is reduced, and reduction in the cost of manufacture can thus be achieved.
摘要:
The present invention is a guide wire imaging device for vascular or non-vascular imaging utilizing optic acoustical methods, which device has a profile of less than 1 mm in diameter. The ultrasound imaging device of the invention comprises a single mode optical fiber with at least one Bragg grating (8), and a piezoelectric or piezo-ceramic jacket (31), which device may achieve omnidirectional (360°) imaging. The imaging guide wire of the invention can function as the guide wire for vascular interventions, can enable real time imaging during balloon inflation, and stent deployment, thus will provide clinical information that is not available when catheter based imaging systems are used. The device of the invention may enable shortened total procedure times, including the fluoroscopy time, will also reduce radiation exposure to the patient, and the operator.
摘要:
Methods and systems for detecting contrast agents is provided. Differences between different sized vessels throughout a period of contrast agent enhancement are identified without significantly depleting the available contrast agent. Dual detection paths are used for imaging, such as one path for detecting nonlinear response and another path for detecting differences between the responses to two or more pulses. Where echoes from two or more pulses of acoustic energy are combined to detect the nonlinear response, the nonlinear response may also include signals originating from a loss-of-correlation (LOC) or motion between received pulses. These signals generated from LOC or motion can be produced from agent disruption where a second received echo is different from a first received echo due to a change in a bubble's shape (i.e., destruction), or from simple spatial translation between acoustic pulses as seen from the same spatial location, respectively. Together the LOC or motion signals and the nonlinear signals can differentiate contrast agent from tissue. Additional information is gained by detecting signals more responsive to difference or motion information. Each path detects different relative amounts of nonlinear response and responses caused by differences between echo signals of multiple pulses. Various systems and methods for detecting contrast agents where one path preferentially detects difference or motion signals and another path preferentially detects nonlinear energy are provided.
摘要:
A diagnostic and/or therapeutic catheter having a plurality of ultrasound transducers. In a first embodiment, the center frequencies of the second and third transducers may be substantially equal to a fundamental harmonic and a second harmonic, respectively, of ultrasound waves created by the first transducer. In second embodiment, the second transducer transmits waves with a center frequency substantially equal to the center frequency of the first transducer. In third embodiment, the second transducer has a center frequency that differs from the center frequency of the first transducer and the center frequency of the third transducer may be substantially equal to a difference between the fundamental harmonic of the ultrasound waves transmitted by the first transducer and a fundamental harmonic of ultrasound waves produced by the second transducer.