摘要:
Solid-state ultrasound imaging devices, systems, and methods are provided. Some embodiments of the present disclosure are particularly directed to identifying and removing artifacts in ultrasound data due to side lobes, grating lobes, and/or other effect. In some embodiments, an ultrasound processing system (800) includes an interface operable to receive A-line signal data (602) and a focusing engine (604-612) operable to perform a focusing process on the received A-line signal data (602) to produce focused A-line signal data. The ultrasound processing system (800) also includes a coherency unit (802) operable to determine a measurement of coherency of the received A-line signal data (602). The ultrasound processing system (800) further includes an adjustment unit (804) operable to determine an adjustment to the focused A-line signal data based on the measurement of coherency, and a compensation unit (812) operable to apply the adjustment to the focused A-line signal data.
摘要:
Embodiments of the present disclosure are related to intravascular imaging devices having a low reverberation housing and associated systems and methods. In some particular embodiments, the devices of the present disclosure include a transducerhousing having a trough on the backside of the ultrasound transducer to deflect ultrasound signals away from the ultrasound transducer. For example, in some implementations an intravascular imaging device is provided that includes a catheter body; a drivecable extending through a lumen of the catheter body; a housing coupled to a distal section of the drive cable; and an ultrasound transducer mounted within the housing, wherein the housing includes a trough on a backside of the ultrasound transducer, the trough shaped to deflect ultrasound signals away from the ultrasound transducer. Methods of making such devices and systems are also provided.
摘要:
Intravascular devices, systems, and methods are disclosed. In some instances, the intravascular device is a guide wire with an adhesive (132) filled distal coil (122). For example, in some implementations a sensing guide wire includes a flexible elongate member (120); a sensing element (108) coupled to a distal portion of the flexible elongate member; and a flexible element (122) filled with a flexible adhesive (132) extending distally from the sensing element. Methods of making, manufacturing, and/or assembling such intravascular devices and associated systems are also provided.
摘要:
The invention provides methods and devices for treating liver cirrhosis or portal hypertension by creating an intrahepatic shunt, or new passage, from a portal vein of a patient to a hepatic vein using a device with intravascular imaging capabilities and pressure sensing capabilities or positioning mechanisms. The integration of intravascular imaging aids in the precise placement of the shunt and pressure measurement may verify successful shunt creation. An apparatus may include a catheter with an extended body for insertion into a hepatic vein of a patient, an intravascular imaging device and a needle exit port on the distal portion of the extended body, and a needle disposed within a lumen in the catheter and configured to be pushed out of the exit port and extend away from a side of the extended body, in which the needle includes a pressure sensor.
摘要:
Devices, systems, and methods for visually depicting a vessel and evaluating treatment options are disclosed. The methods can include introducing instruments into the vessel of a patient and obtaining proximal and distal pressure measurements of a stenosis of the vessel,calculating a pressure ratio based on the obtained proximal and distal pressure measurements, applying a correlation factor to the calculated pressure ratio to produce a predicted diagnostic pressure ratio, and displaying the predicted diagnostic pressure ratio to a user.
摘要:
Intravascular devices, systems, and methods are disclosed. In some instances, the intravascular device is a guide wire with electrical conductors embedded within a core wire. In some instances, the electrical conductors are coupled to conductive bands adjacent a proximal portion of the guide wire and a sensing element adjacent a distal portion of the guide wire. Methods of making, manufacturing, and/or assembling such intravascular devices and associated systems are also provided.
摘要:
The invention generally relates to treatment of fistulas and abscesses and specifically to an all-in-one treatment device. The invention provides an aspiration catheter with imaging capabilities that can also deploy a blocking device, thereby providing an all-in-one treatment device for treating a fistula or an abscess. The device is inserted into an abscess and its imaging capabilities can be used to guide the device to a treatment site. A clogging device can be deployed from the device to prevent draining into, or out of, the abscess. In certain aspects, the invention provides a device for aspirating an abscess or fistula that includes a catheter having an extended body with a lumen therein, an imaging device such as an ultrasonic transducer disposed at a distal portion of the catheter, and a clogging device deployable from the catheter.
摘要:
The invention generally relates to intraluminal procedures, and, more particularly, to a catheter assembly and methodology for creating a vascular access site between vessels. The invention provides a catheter assembly configured for percutaneous introduction into and extension through a blood vessel and further configured to create a vascular access site between two closely associated vessels. The catheter assembly includes at least one catheter having both intraluminal imaging capabilities and the ability to create a vascular access site on-demand within a vessel.
摘要:
What is described is an apparatus for intravascular pressure measurement, comprising an elongate body and a first pressure sensor. The elongate body includes a proximal portion and a distal portion, the body defines a lumen extending from a proximal end to a distal end of the body, the lumen is sized and shaped to allow the passage of a guidewire therethrough, and the body includes an annular wall extending from the lumen to an outer surface of the body. The first pressure sensor is disposed entirely within the wall of the distal portion of the body, and the pressure sensor includes a sensor cover coupled to the wall. An exterior surface of the sensor cover and the outer surface of the body are substantially aligned.
摘要:
Intravascular devices, systems, and methods are disclosed. In some embodiments, a method of assembling an intravascular device is provided that include positioning a first tubular member around a plurality of conductors and a core member such that the plurality of conductors and the core member are at least partially positioned within a lumen of the first tubular member, the first tubular member including an opening extending along a length of the first tubular member in communication with the lumen; positioning a first conductive member around the first tubular member; advancing a first of the plurality of conductors through the opening of the first tubular member, longitudinally between the first tubular member and the first conductive member, and through to a position adjacent to the first conductive member; and electrically coupling the first of the plurality of conductors to the first conductive member.