46 results about "Endoscopic ultrasound" patented technology

An ultrasound transducer manufactured by using a micromachining process comprises: a first electrode into which a control signal for transmitting ultrasound is input; a substrate on which the first electrode is formed; a second electrode that is a ground electrode facing the first electrode with a prescribed space between the first and second electrodes; a membrane on which the second electrode is formed and which vibrates and generates the ultrasound when a voltage is applied between the first and second electrodes; a piezoelectric film contacting the membrane; and a third electrode electrically continuous to the piezoelectric film.

A handle for a medical device includes a proximal segment defining a proximal lumen extending therethrough and sized and shaped to receive an endoscopic medical device therein. A medial segment is received within a distal portion of the proximal segment and has an outer diameter smaller than an inner diameter thereof. A medial lumen extends through the proximal segment and is open to the proximal lumen. A distal segment is received within a distal portion of the medial segment and defines a distal lumen extending therethrough open to the medial lumen. The distal segment has an outer diameter smaller than an inner diameter of the medial segment. The medial segment includes a first movement limiting mechanism limiting movement of an endoscopic medical device inserted therethrough along an axis of the distal lumen and a second movement limiting mechanism limiting advancement of an endoscope attached to the distal body portion.

The invention provides an ultrasonic / optical dual-mode imaging probe for endoscopic imaging. The ultrasonic / optical dual-mode imaging probe comprises an optical module, an ultrasonic component as well as a reflection element, wherein the optical module is used for transmitting and receiving optical signals of optical imaging and consists of a light guide component and a position fixing component; the ultrasonic component is used for transmitting and receiving ultrasonic signals in ultrasonic imaging; an optical reflection boundary and an ultrasonic reflection boundary are arranged on the reflection element; the optical module, the reflection element and the ultrasonic component are sequentially arranged in the axial direction of the imaging probe, so that the reflection element can simultaneously reflect optical signals and ultrasonic signals laterally. In addition, the invention further provides an imaging method for double-mode imaging by using the dual-mode imaging probe. By adopting the imaging probe and the imaging method, on the premise that the diameter of the probe is relatively small, optical and ultrasonic dual-mode imaging can be performed on one same tube cavity cross section at one same moment, so that parts with relatively small tube cavity diameters can also be easily checked and diagnosed, and disease checking and diagnosis are facilitated.

A radiofrequency tissue ablation device includes an elongate outer cannula having proximal and distal ends and an intermediate length therebetween where a longitudinal region of the intermediate length is configured as an ablation electrode. A cannula lumen extends longitudinally through the cannula. A stylet extends slidably through the lumen and is secured to the cannula between the ablation electrode and the cannula distal end. The ablation electrode includes a plurality of substantially parallel helical apertures disposed around and extending through a cannula circumference. The ablation electrode is configured to be circumferentially expandable such that in a first state, it is essentially cylindrical with a substantially uniform outer diameter along substantially its entire length, and in a second state, its parallel helical apertures are expanded such that the intervening portions of the cannula form an outer diameter greater than the outer diameter of cannula portions proximal and distal of the electrode.

A notched tissue-collection needle configured similarly to a fine- needle-aspiration needle is provided with a cutting edge disposed in the notch and configured to excise tissue into the notch for collection. A stylet may be provided through a lumen of the needle during introduction into a patient body. The needle may be provided with echogenicity-enhancing features.

The present disclosure provides an access system having a steerable catheter assembly configured to provide access to and guide a target vessel for subsequent treatment. The access system includes an adjustable delivery handle assembly and an access catheter subassembly having a steerable access catheter configured to be delivered to a target site (e.g., into the duodenum) for Adjunctive treatment of conditions (e.g. biliary drainage via endoscopic ultrasound-guided biliary drainage (EUS‑BD) techniques). The access catheter includes at least a distal segment having an adjustable portion along its length configured to transition into a predetermined arcuate shape in order to guide it through a vessel, such as a bile duct ), provide directional control to the distal end of the catheter. The handle assembly includes additional elements configured to allow the clinician to manipulate and manipulate the distal end of the access catheter.

A handle for a medical device comprises a proximal segment defining a proximal lumen extending therethrough and sized and shaped to receive an endoscopic medical device therein. A medial segment is received within a distal portion of the proximal segment and has an outer diameter smaller than an inner diameter thereof. A medial lumen extends through the proximal segment and is open to the proximal lumen. A distal segment is received within a distal portion of the medial segment and defines a distal lumen extending therethrough open to the medial lumen. The distal segment has an outer diameter smaller than an inner diameter of the medial segment. The medial segment includes a first movement limiting mechanism limiting movement of an endoscopic medical device inserted therethrough along an axis of the distal lumen and a second movement limiting mechanism limiting advancement of an endoscope attached to the distal body portion.

The invention relates to an ultrasonic therapeutic system under direct vision of an optical speculum. The system comprises an optical speculum and an ultrasonic therapeutic head, and the ultrasonic therapeutic head is fixed at the front end of the head of the optical speculum. The ultrasonic therapy head is fixed to the front end of the head of the optical scope through the supporting device. According to different application parts, the present invention can select optical speculums of different sizes and head diameters and matching ultrasonic treatment heads to ensure that the device can perform treatment in different cavities, relieve patients' pain and ensure the normal operation of ultrasonic treatment equipment .