194results about How to "Avoid tissue damage" patented technology

Surgical devices, systems and methods for treating tissue are provided. An exemplary surgical device comprises a tip portion including first and second jaws each having a tissue grasping surface, at least one of the jaws being movable toward the other jaw. The tissue grasping surface of each jaw has includes an electrically insulative surface. The device also includes first and second electrodes connectable to different terminals of an RF generator to generate electrical current flow therebetween, with each of the electrodes having an electrode surface. One of the electrode surfaces is located on one of the jaws separated from one edge of the tissue grasping surface, and the other of the electrode surfaces is located on one or the other of the jaws separated from the other edge of the tissue grasping surface. The device also includes at least one fluid passage being connectable to a fluid source.

Methods and devices for fastening tissue are provided. In one exemplary embodiment, a tissue fastener is provided and includes a male fastening member having a base plate with at least one post extending therefrom and having a tissue-piercing tip. A protective member is coupled to the male fastening member and is movable between an open position in which the tissue-piercing tip is enclosed within the protective member such that the tissue-piercing tip is prevented from penetrating tissue, and a compressed position in which the tissue-piercing tip is exposed to penetrate tissue. A female fastening member is configured to mate to the male fastening member and to engage tissue therebetween.

Provided herein are biomedical devices and methods of making and using biomedical devices for sensing and actuation applications. For example, flexible and / or stretchable biomedical devices are provided including electronic devices useful for establishing in situ conformal contact with a tissue in a biological environment. The invention includes implantable electronic devices and devices administered to the surfaces(s) of a target tissue, for example, for obtaining electrophysiology data from a tissue such as cardiac, brain tissue or skin.

Surgical devices, systems and methods for treating tissue are provided. An exemplary surgical device comprises a tip portion including first and second jaws each having a tissue grasping surface, at least one of the jaws being movable toward the other jaw. The tissue grasping surface of each jaw has includes an electrically insulative surface. The device also includes first and second electrodes connectable to different terminals of an RF generator to generate electrical current flow therebetween, with each of the electrodes having an electrode surface. One of the electrode surfaces is located on one of the jaws separated from one edge of the tissue grasping surface, and the other of the electrode surfaces is located on one or the other of the jaws separated from the other edge of the tissue grasping surface. The device also includes at least one fluid passage being connectable to a fluid source.

A catheter and catheter system can use energy tailored for remodeling and / or removal of target material proximate to a body lumen, often of stenotic material or tissue in the luminal wall of a blood vessel of a patient. An elongate flexible catheter body with a radially expandable structure may have a plurality of electrodes or other electrosurgical energy delivery surfaces to radially engage the luminal wall when the structure expands. Feedback using one or parameters of voltage, current, power, temperature, impedance magnitude, impedance phase angle, and frequency may be used to selectively control the delivery of energy.

Apparatus for delivering a medical device to a location in a patient's body includes an elongate catheter body having a proximal end and a distal end, a pod coupled with the distal end of the catheter body and adapted to house the medical device during delivery to the location and to open to release the medical device, and at least one distal actuator coupled with at least one of the pod and the medical device. The distal actuator is adapted to promote opening of the pod. A method involves advancing a pod at the distal end of an elongate catheter to the location within the body and activating an actuator coupled with the pod and / or the medical device to cause the pod to open. Opening the pod releases the medical device.

Apparatus for delivering a medical device to a location in a patient's body includes an elongate catheter body having a proximal end and a distal end, a pod coupled with the distal end of the catheter body and adapted to house the medical device during delivery to the location and to open to release the medical device, and at least one distal actuator coupled with at least one of the pod and the medical device. The distal actuator is adapted to promote opening of the pod. A method involves advancing a pod at the distal end of an elongate catheter to the location within the body and activating an actuator coupled with the pod and / or the medical device to cause the pod to open. Opening the pod releases the medical device.

Patients having diminished circulation in the cerebral vasculature as a result of stroke or from other causes such as cardiac arrest, shock or head trauma, or aneurysm surgery or aortic surgery, are treated by flowing an oxygenated medium through an arterial access site into the cerebral vasculature and collecting the medium through an access site in the venous site of the cerebral vasculature. Usually, the cold oxygenated medium will comprise autologous blood, and the blood will be recirculated for a time sufficient to permit treatment of the underlying cause of diminished circulation. In addition to oxygenation, the recirculating blood will also be cooled to hypothermically treat and preserve brain tissue. Isolation and cooling of cerebral vasculature in patients undergoing aortic and other procedures is achieved by internally occluding at least the right common carotid artery above the aortic arch. Blood or other oxygenated medium is perfused through the occluded common carotid artery(ies) and into the arterial cerebral vasculature. Usually, oxygen depleted blood or other medium leaving the cerebral vasculature is collected, oxygenated, and cooled in an extracorporeal circuit so that it may be returned to the patient. Occlusion of the carotid artery(ies) is preferably accomplished using expansible occluders, such as balloon-tipped cannula, catheters, or similar access devices. Access to the occlusion site(s) may be open surgical, percutaneous, or intravascular.

An electrosurgical generator for coagulating tissue comprises a source of radio frequency (RF) energy, and at least a pair of output terminals for connection to a bipolar electrosurgical instrument adapted to contact tissue, the output terminals delivering RF energy from the source to the instrument such that the source delivers RF energy into tissue. The generator also includes boiling detection means for determining when the RF energy starts to cause the boiling of electrolytes within the tissue. A timer is adapted to determine when a predetermined period of time has elapsed since the boiling detection means has indicated the start of the boiling of electrolytes. An indication means gives an indication when the predetermined period of time has elapsed.

System and method for non-invasive lysis of sub-dermal tissue by means of focused ultrasonic energy, the system comprising: a source of ultrasonic energy adapted to operate in continuous wave mode and to focus ultrasonic energy in a focal zone within the sub-dermal tissue, the ultrasonic energy being adapted to induce tissue cavitation in the focal zone; means for continuous displacement of the source over the skin surface; and means for determining a safe speed for the displacement, the safe speed allowing to avoid thermal tissue damage. The source of ultrasonic energy is accommodated in a hand-held applicator including a wheeled traction system powered by an electric drive.

Cardiovascular parameters of a patient undergoing a procedure involving general anesthesia are maintained by controlling the patient's body temperature. Such control involves the use of a garment enveloping substantial portions of the patient's body and utilizing a heating / cooling regime taking into consideration the heat transfer dynamics of the body.

Cardiovascular parameters of a patient undergoing a procedure involving general anesthesia are maintained by controlling the patient's body temperature. Such control involves the use of a garment enveloping substantial portions of the patient's body and utilizing a heating / cooling regime taking into consideration the heat transfer dynamics of the body.

Surgical devices, systems and methods for treating tissue. An exemplary surgical device comprises a tip portion including first and second jaws each having a tissue grasping surface, at least one of the jaws being movable toward the other jaw. The tissue grasping surface of each jaw has includes an electrically insulative surface. The device also includes first and second electrodes connectable to different terminals of an RF generator to generate electrical current flow therebetween, with each of the electrodes having an electrode surface. One of the electrode surfaces is located on one of the jaws separated from one edge of the tissue grasping surface, and the other of the electrode surfaces is located on one or the other of the jaws separated from the other edge of the tissue grasping surface. The device also includes at least one fluid passage being connectable to a fluid source.

Patients having diminished circulation in the cerebral vasculature as a result of cardiac arrest or from other causes are treated by flowing an oxygenated medium through an arterial access site into the cerebral vasculature and collecting the medium through an access site in the venous site of the cerebral vasculature. In addition to oxygenation, the recirculating blood may also be cooled to hypothermically treat and preserve brain tissue. Isolation and cooling of cerebral vasculature in patients undergoing aortic and other procedures is achieved by internally occluding at least the right common carotid artery above the aortic arch. Blood or other oxygenated medium is perfused through the occluded common carotid artery(ies) and into the arterial cerebral vasculature. Usually, oxygen depleted blood or other medium leaving the cerebral vasculature is collected, oxygenated, and cooled in an extracorporeal circuit so that it may be returned to the patient.

An airway intubation device having a one-piece molded body of biocompatible material with an ergonomically designed hand piece for left hand manipulation. The body includes a cap piece and linear-curved-linear insertion piece having a channel in one side thereof for insertion of an endotracheal tube. The channel has a wide entry portal disposed ahead of the hand piece so that a clinician may load the channel with a tube while the insertion piece is in the mouth of the patient without having to view the entry portal. The device includes illumination means and viewing means comprising an eye piece or a video display unit mounted to the cap piece so that a clinician can view the insertion of the tube between the vocal cords of a patient without contact.

A pressure and a vision regulation method and device for irrigation of a body cavity (1), in which method an inflow liquid pump (2) pressurizes the irrigation liquid in a feed line (13) and in which an outflow device (3) or an external suction source (20) drains the irrigation liquid from the body cavity (1) through a tubing (16) into a waste container (17) and in which a control unit (4) controls either the inflow liquid pump (2) only or both the inflow liquid pump (2) and the outflow device (3) depending on an inflow irrigation liquid pressure from a pressure sensor (5), where the first control unit (4) compares the inflow irrigation liquid pressure and flow with pressures calculated to correspond to pressure in the body cavity for the respective flow for a nominal surgical site and that a matching between the calculated values and the inflow irrigation liquid pressures is made by altering the effect of either the inflow liquid pump (2) only or the inflow liquid pump (2) and / or the outflow device (3) and / or the shut off valve. The above-mentioned pressure registration method and the device for irrigation of a body cavity is combined with an method for detecting blood cells, red blood cells, haemoglobin and / or debris in liquid coming from a surgical site so an automatically control and rinsing system is achieved keeping a clear vision in the viewing area of the operational site.

A system and process for treating retinal diseases includes passing a laser light beam through an optical lens or mask to optically shape the light beam. The light beam is applied to at least a portion of the retina. Due to the selected parameters of the laser light beam pulse length, power and duty cycle, the laser light beam can be applied to substantially the entire retina, including the fovea, without damaging retinal or foveal tissue, while still attaining the benefits of retinal photocoagulation.

A catheter and catheter system can use energy tailored for remodeling and / or removal of target material proximate to a body lumen, often of stenotic material or tissue in the luminal wall of a blood vessel of a patient. An elongate flexible catheter body with a radially expandable structure may have a plurality of electrodes or other electrosurgical energy delivery surfaces to radially engage the luminal wall when the structure expands. Feedback using one or parameters of voltage, current, power, temperature, impedance magnitude, impedance phase angle, and frequency may be used to selectively control the delivery of energy.

A pressure and a vision regulation method and device for irrigation of a body cavity (1), in which an inflow liquid pump (2) pressurizes the irrigation liquid in a feed line (13) and an outflow device (3) or an external suction source (20) drains the irrigation liquid from the body cavity (1) through a tubing (16) into a waste container (17). A control unit (4) controls either the inflow liquid pump (2) only or both the inflow liquid pump (2) and the outflow device (3) depending on an inflow irrigation liquid pressure from a pressure sensor (5). The method and the device are combined with a method for detecting blood cells, red blood cells, haemoglobin and / or debris in liquid coming from a surgical site to provide an automatic control and rinsing system with clear vision in the viewing area of the operational site.

A method for preventing or treating tissue damage associated with ischemia-reperfusion injury and thoraco-abdominal aortic aneurysm (TAAA) repair by administering a tissue damage preventing or treating amount of a complement inhibitor to a patient likely to suffer from or suffering from tissue damage associated with ischemia-reperfusion injury or TAAA repair. The complement inhibitors are preferably antibodies that bind to and inhibit complement proteins involved in the formation of the membrane attach complex, preferably antibodies that inhibit MBL, MASP1, MASP2, and MASP3 in the lectin pathway. The complement inhibitors can be used alone or in combination to decrease the morbidity and mortality caused by tissue damage associated with ischemia-reperfusion injury or TAAA repair.

Pressure monitoring methods and systems for warning a patient or caregiver that soft tissue pressure has exceeded some predetermined level that over time would necessitate moving the patient to prevent or at least reduce a risk of soft tissue damage. The methods and systems entail the use of a pressure sensing unit adapted to be applied to or near a surface of the patient's body, and a sensor associated with the sensing unit to generate electrical outputs corresponding to soft tissue pressure sensed at the surface. The electrical outputs are wirelessly monitored over a preselected time period to generate a cumulative output signal based on the electrical outputs and corresponding to whether or not the soft tissue pressure has exceeded a predetermined pressure level during the preselected time period. An alarm is generated if the cumulative output signal exceeds a predetermined cumulative threshold until the soft tissue pressure drops below the predetermined pressure level.

A thermal treatment control system including an imaging device for specifying the geometry and / or location of the treatment target, a thermal energy element for applying a thermal treatment for the heating or cooling of a target tissue for therapeutic purposes, a thermal energy detecting element for detecting a measured tissue response to the thermal treatment and a feedback controller for a real-time modification of the intensity and spatial distribution of the thermal dose in order to achieve therapeutic efficacy over a minimum or reduced treatment time while satisfying treatment constraints imposed to limit damage to normal tissues.

Disclosed are systems for the application of heat to an area of the body of a mammal, a system including a device fabricated from or coated with a material comprising of a non-metal matrix and susceptor particles, a non-invasive inductor and magnetic circuit for heating the particles by transmitting an alternating magnetic field (AMF), and an alternating current generator that provides an alternating current to the inductor. Also disclosed are methods related to the non-invasive application of heat to mammalian tissue. These systems and methods are useful where heat must be applied in a controlled manner to avoid undesired damage to tissue.

To protect tissue in the treatment of an eye (3) with a focused pulsed laser beam (21) generated by a laser system (2), e.g. a femtolaser system, operating data which define an operating area operated on by the focus (F) of the laser beam (21) during the treatment are acquired in a device (1). The device (1) comprises a processing module (14) for providing control data for the laser system (2) on the basis of the operating data and taking into consideration the light propagation in the eye. The control data limit the time of the treatment by the focus (F) at positions within the operating area in each case in such a manner that tissue damage resulting from the treatment by the laser beam (21) is essentially prevented in eye structures located outside the operating area. In particular, the control data determine movements of the focus (F) within the operating area and / or the activity of the laser beam (21) in such a manner that the mean irradiation intensity is reduced and the maximum temperatures in the tissue of eye structures located outside the operating area, particularly in the iris and the retina, are reduced.

A pressure and a vision regulation method and device for irrigation of a body cavity (1), in which method an inflow liquid pump (2) pressurizes the irrigation liquid in a feed line (13) and in which an outflow device (3) or an external suction source (20) drains the irrigation liquid from the body cavity (1) through a tubing (16) into a waste container (17) and in which a control unit (4) controls either the inflow liquid pump (2) only or both the inflow liquid pump (2) and the outflow device (3) depending on an inflow irrigation liquid pressure from a pressure sensor (5), where the first control unit (4) compares the inflow irrigation liquid pressure and flow with pressures calculated to correspond to pressure in the body cavity for the respective flow for a nominal surgical site and that a matching between the calculated values and the inflow irrigation liquid pressures is made by altering the effect of either the inflow liquid pump (2) only or the inflow liquid pump (2) and / or the outflow device (3) and / or the shut off valve. The above-mentioned pressure registration method and the device for irrigation of a body cavity is combined with an method for detecting blood cells, red blood cells, haemoglobin and / or debris in liquid coming from a surgical site so an automatically control and rinsing system is achieved keeping a clear vision in the viewing area of the operational site.

Devices and methods are provided for assisting in the ventricular function of a treated heart, and tools for delivering and attaching elements of said devices to the wall of the heart. In general the devices are designed to assist in the ventricular function of the heart by utilizing elastic, and / or magnetic, elements designed to apply radially and / or tangentially directed forces over the wall of the heart, and / or alter the pressure conditions inside ventricle(s) of the heart. Embodiments may utilize restrictive elements which may optionally be attached over the heart during the implantation procedure, or at a later time, by changing the mode of operation of an implanted device.

The present invention is directed to a device for minimizing or preventing damages due to ischemia that can occur within supported or retracted dermal and / or subdermal living tissue, most particularly during surgical procedures, by one or a combination of several means including cyclically applying and reducing supporting or retracting pressure at each of at least two tissue sections into which the supported or retracted tissue is subdivided, bathing these tissue sections with gases and / or liquids such as oxygen and oxygenated blood, presenting low-pressure regions or partial vacuum to areas within these tissue-sections to stimulate bleeding to encourage blood perfusion, controlling the temperature of these tissue sections to forestall ischemic damage, and mechanically moving at least a portion of these tissue sections to stimulate blood perfusion with, for example, a vibrating mechanism.

Homoiminopiperidinyl Hexanoic Acid derivatives and pharmaceutically acceptable salts thereof useful in the inhibition of the inducible isoform of nitric oxide synthase are disclosed.