Abstract:
The disclosure is directed to radiation catheter devices, methods for controlled application of irradiation to tissue at a body site, such as a cavity formed after removal of tissue, e.g. cancer, using such radiation catheter devices, solutions for forming a more lubricious luminal surface and method for lining lumens of such devices to improve the frictional characteristics thereof. The catheter device includes a flexible elongated shaft which is formed of low durometer polymeric material, which can be readily folded or coiled for securing the shaft to or under the skin of the patient and a radiation lumen lined with high durometer polymeric material and finely divided particulate to improve the frictional characteristics. The elongated shaft has at least one inner lumen for receiving a radiation source which has a layer of high durometer polymeric material that provides lower surface friction to facilitate advancement of a radiation source therein.
Abstract:
The invention is directed to devices and methods for separating and collecting a tissue specimen form a patient's target site. The device includes a probe member and a penetrating distal tip and a tissue receiving aperture, and a tissue cutting member which is rotatable disposed within the probe member to cut a tissue specimen drawn into the interior of the device through the aperture. The longitudinal edges of the aperture are preferably sharpened to engage the cutting edges of the tissue cutting member. Vacuum may be provided in the inner lumen of the cutting member to transport the tissue therethrough. Rotation, rotational oscillation and/or longitudinal reciprocation of the tissue cutting member is effective to separate a tissue specimen from surrounding tissue. An accessing cannula having a tissue receiving aperture may be concentrically disposed within the probe member and about the tissue cutting member.
Abstract:
The invention is directed to a system and device for separating and collecting a tissue specimen from a patient target site. The device includes a probe component (11) with an elongated tubular section (15), a penetrating distal tip (16) and a tissue receiving aperture (17) in the distal end of the tubular section proximal to the distal tip, and a tissue cutting member (20) which is slidably disposed within the probe member to cut a tissue specimen drawn into the interior of the device through the aperture by applying a vacuum to the inner lumen of the tissue cutting member. The device has a driver component (12) to which the probe component is releasably secured. The driver has a drive member (22,23) for adjusting the orientation of the tubular section and one or more drive members (30) for moving the tissue cutting member within the tubular section to sever a tissue specimen. The motion imparted to the tissue cutter is at least longitudinal and preferably is also oscillation and/or rotational.
Abstract:
The disclosure describes devices and methods for asymmetrical irradiation at a body cavity or site, such as after removal of tissue, e.g. biopsy or cancer. One device includes a lumen which is off-set or off-settable from a longitudinal axis to increase the intensity of radiation received from a radiation source by a first tissue portion surrounding the body cavity and to reduce or minimize radiation received by a second tissue portion (e.g. healthy tissue) surrounding the body cavity.
Abstract:
The invention is directed to a system and device for separating and collecting a tissue specimen from a target site within a patient. The device includes a probe component (11) with an elongated tubular section (15), a penetrating distal tip (16) and a tissue receiving aperture (17) in the distal end of the tubular section proximal to the distal tip, and a tissue cutting member (20) which is slidably disposed within the probe member to cut a tissue specimen drawn into the interior of the device through the aperture by applying a vacuum to the inner lumen of the tissue cutting member. The device also has a driver component (12) to which the probe component is releasably secured. The driver has a drive member (22,23) for adjusting the orientation of the tubular section and thus the aperture therein and one or more drive members (30) for moving the tissue cutting member within the tubular section to sever a tissue specimen from tissue extending into the interior of the tubular section through the aperture. The motion imparted to the tissue cutter is at least longitudinal and preferably is also oscillation and/or rotational to effectively separate a tissue specimen from tissue extending through the aperture in the tubular section.
Abstract:
The invention is directed to a system and device for separating and collecting a tissue specimen from a target site within a patient. The device includes a probe component which is releasably secured to the driver component (12). The probe component has an elongated tubular section (15), a penetrating distal tip (16) and a tissue receiving aperture (17) in the distal end of the tubular section proximal to the distal tip, and a tissue cutting member (20) which is slidably disposed within the probe member to cut a tissue specimen drawn into the interior of the device through the aperture by applying a vacuum (59) to the inner lumen of the tissue cutting member. The driver has drive members (22, 30, 40) for operating the elements of the probe component. The tissue penetrating distal tip preferably has a triple concave curvature shape with three curved cutting edges leading to a sharp distal point.