摘要:
An apparatus includes a body configured to be at least partially inserted into a rectum of a patient. The body defines a first passageway and a second passageway between a proximal end portion and a distal end portion. The first passageway is configured to receive a medical tool and the second passageway is configured to communicate an insufflation medium. An insufflation port is coupled to the second passageway and is configured to communicate the insufflation medium to the second passageway. A retention portion is coupled to the body and is configured to have a dimension transverse to an axis defined by the body sufficient to retain at least a portion of the body in the rectum. The retention portion is configured to be located beyond an anus of the patient.
摘要:
An apparatus comprises a catheter, a conductive element and a balloon. The catheter has a lumen. The conductive element is disposed along the catheter. The balloon has an interior in fluid communication with the lumen of the catheter. The balloon is formed of a conductive material conductively coupled to the conductive element. The balloon has a collapsed configuration and an expanded configuration.
摘要:
A system for treating a target tissue region (e.g., malignant tissue) is provided. A hyperthermic probe coupled to a source thermal energy is placed into contact with the target tissue region, and the target tissue region is exposed to a therapeutic x-ray radiation beam. The probe is operated to increase the temperature of the target tissue region, thereby facilitating a therapeutic effect of the radiation beam. Image data of the probe containing a fiducial datum is acquired while in contact with the target tissue region, a position of the target tissue region within a treatment coordinate system is determined based on the fiducial datum, and the radiation beam is spatially adjusted relative to the target tissue region based on the determined position of the target tissue region.
摘要:
Devices for occluding a vessel in a percutaneous ablation procedure. An elongated access device having a lumen and a tissue piercing, open distal end in communication with the lumen is used to percutaneously access a vessel that supplied blood to the tissue to be treated. An elongated balloon deployment device is used to deliver a balloon into the interior of the vessel. Subsequently, the balloon is inflated, resulting in the occlusion of the vessel. The tissue to be treated is then ablated. Because there is little or no blood to transfer the thermal energy away from the heated tissue, the ablation procedure is performed more efficiently. The balloon may be subsequently deflated allowing normal flow through the vessel to return.
摘要:
A composition comprising a substantially spherical polymer particle having a diameter of about 1200 microns or less. The agents can be radioactive species. The agents can be therapeutic agents. The agents can be in and/or on the particles.
摘要:
A tissue ablation probe comprises an electrically conductive probe shaft, at least one electrode, and an electrically insulative sheath disposed on the probe shaft. The insulative sheath has thickened regions forming alternating ribs and depressions that longitudinally extend along the probe shaft. The ribs allow the ablation probe to be delivered through a tightly toleranced delivery device. While the ribs may shear off during the delivery process, the underlying probe shaft will remain covered by the remaining portion of the insulative sheath. The tissue ablation probe may be used in a tissue ablation assembly that additionally comprises a delivery cannula having a lumen in which the tissue ablation probe may be removably disposed. In this case, the sheath has an outer periphery having a size substantially the same as the diameter of the lumen, so that the inner surface of the delivery cannula cooperates with the depressions to create lumens that longitudinally extend within the cannula.
摘要:
A vessel occlusion apparatus includes an elongate shaft having a fluid delivery lumen; and an expandable member carried on a distal end portion of the shaft, the expandable member comprising a body defining an interior region, the interior region in communication with the fluid delivery lumen, the body comprising a wall having one or more embedded fluid pockets therein, each of the one or more pockets containing a fluid capable of being imaged, e.g., having echogenic qualities for detection using ultrasound imaging.
摘要:
A stent for maintaining an open passageway through a body lumen, such as the prostatic urethra of a male patient, includes a coil segment and a flexible polymer material encapsulating the coil segment. The coil segment defines a lumen extending therethrough and includes a distal portion, a middle portion, and a proximal portion. Both the distal and proximal portions of the coil segment have a greater outer diameter in comparison to the middle portion, so as to enhance retention of the stent after placement within the patient's body. The coil segment is made from a wound element that includes one or more spaced windings. The flexible polymer material is disposed between adjacent spaced winding to form an imperforate flexible webbing that encapsulates the coil segment and prevents the growth of tissue between the windings and into the coil segment's lumen when the stent is placed within the patient.
摘要:
An apparatus (10) for delivering an agent to a target site within a body includes an outer tubular body (12), an inner tubular body (20) slidably disposed within the outer tubular body, a substance delivery port (60, 25) located on the inner tubular body, and an electrode (50) secured to the outer tubular body. The delivery port can be used to deliver a substance to the target site, and the electrode can be used to seal an access channel leading to the treatment site, thereby substantially preventing migration of material from the delivery site. In order to minimize the profile of the apparatus, a braided conductor (352) can extend through the wall of the outer tubular body, thereby providing a means for delivering electrical energy to the electrode (50, 330), while strengthening the wall of the outer tubular body to minimize the risk of rupture during delivery of the substance.