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Excisional biopsy devices and methods

InactiveUS6863676B2Efficiently and safely exciseMinimize complicationCannulasSurgical needlesUltrasonic sensorTissue Collection
An excisional biopsy system includes a tubular member that has a proximal end and a distal end in which one or more windows are defined. A first removable probe has a proximal portion that includes a cutting tool extender and a distal portion that includes a cutting tool. The first removable probe may be configured to fit at least partially within the tubular member to enable the cutting tool to selectively bow out of and to retract within one of the windows when the cutting tool extender is activated. A second removable probe has a proximal section that includes a tissue collection device extender and a distal section that includes a tissue collection device. The second removable probe may also be configured to fit at least partially within the tubular member to enable the tissue collection device to extend out of and to retract within one of the windows when the tissue collection device extender is activated. A third removable probe may also be provided. The third removable probe may also be configured to fit at least partially within the tubular member and may include an imaging device, such as an ultrasound transducer, mounted therein. By selectively activating the cutting tool and the tissue collection device while rotating the excisional device, a tissue specimen may be cut from the surrounding tissue and collected for later analysis.
Owner:ENCAPSULE MEDICAL

Excisional biopsy devices and methods

An excisional biopsy system includes a tubular member that has a proximal end and a distal end in which one or more windows are defined. A first removable probe has a proximal portion that includes a cutting tool extender and a distal portion that includes a cutting tool. The first removable probe may be configured to fit at least partially within the tubular member to enable the cutting tool to selectively bow out of and to retract within one of the windows when the cutting tool extender is activated. A second removable probe has a proximal section that includes a tissue collection device extender and a distal section that includes a tissue collection device. The second removable probe may also be configured to fit at least partially within the tubular member to enable the tissue collection device to extend out of and to retract within one of the windows when the tissue collection device extender is activated. A third removable probe may also be provided. The third removable probe may also be configured to fit at least partially within the tubular member and may include an imaging device, such as an ultrasound transducer, mounted therein. By selectively activating the cutting tool and the tissue collection device while rotating the excisional device, a tissue specimen may be cut from the surrounding tissue and collected for later analysis.
Owner:ENCAPSULE MEDICAL

Excisional biopsy devices and methods

An excisional biopsy device includes a tubular member having a window near a distal tip thereof; a cutting tool, a distal end of the cutting tool being attached near the distal tip of the tubular member, at least a distal portion of the cutting tool being configured to selectively bow out of the window and to retract within the window; and a tissue collection device externally attached at least to the tubular member, the tissue collection device collecting tissue excised by the cutting tool as the biopsy device is rotated and the cutting tool is bowed. An excision al biopsy method for soft tissue includes the steps of inserting a generally tubular member into the tissue, the tubular member including a cutting tool adapted to selectively bow away from the tubular member and an external tissue collection device near a distal tip of the tubular member; rotating the tubular member; selectively varying a degree of bowing of the cutting tool; collecting tissue severed by the cutting tool in the tissue collection device; and retracting the tubular member from the soft tissue. The tubular member may include an imaging transducer and the method may include the step of displaying information received from the transducer on a display device and the step of varying the degree of bowing of the cutting tool based upon the displayed information from the imaging transducer. Alternatively, the imaging transducer may be disposed within a removable transducer core adapted to fit within the tubular member.
Owner:ENCAPSULE MEDICAL

Exhaust aftertreatment system using urea water

An exhaust aftertreatment system comprises an injector for injecting urea water into an exhaust duct, and a denitration catalyst disposed downstream of the injector with respect to a flow of exhaust gas. The exhaust aftertreatment system reduces nitrogen oxides in the exhaust gas by the denitration catalyst while using ammonia produced from the urea water injected from the injector. The urea water is injected along a direction of the flow of the exhaust gas within the exhaust duct, and a porous plate is disposed in multiple stages in a space of the exhaust duct such that droplets of the injected urea water impinge against the porous plate before reaching a wall surface of the exhaust duct. A surface of the porous plate subjected to the impingement of the droplets is arranged to face downstream with respect to the flow of the exhaust gas. Deposition of the urea water is prevented by causing film boiling when the droplets impinge against the porous plate, and the urea water reflected by the porous plate is uniformly dispersed into the exhaust gas. Thus, the urea water is uniformly dispersed into the exhaust gas without increasing a pressure loss of the exhaust gas. The urea water is prevented from depositing on the wall surface and producing a precipitate in the form of a solid.
Owner:HITACHI HIGH-TECH CORP +2
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