A method, including pressing a distal end of a medical probe against a wall of a body cavity, and receiving from the probe first measurements of a force exerted by the distal end on the wall. The method also includes receiving from the probe second measurements indicating a displacement of the wall in response to the force. The method further includes estimating a thickness of the wall based on the first and the second measurements.

A delivery system for an intracorporeal device includes a sheath defining one or more lumens shaped to receive a delivery catheter or shaft and a guidewire. The system may include a delivery shaft having a distal coupling feature adapted to releasably couple with a proximal coupling feature of the intracorporeal device. The delivery system may further include a hub through which the delivery shaft and guidewire are passed. The delivery shaft may be coupled to a feature, such as a knob, that enables manipulation of the delivery shaft to decouple the distal fixation feature from the proximal fixation feature of the intracorporeal device in order to deploy the intracorporeal device within a patient.

An intravenous sensing system includes an intravenous needle that may be inserted into an artery. Thus, the intravenous needle may receive blood from the artery. The intravenous needle may be fluidly coupled to a dialysis machine. Thus, the blood may be routed to the dialysis machine. A sensing unit is coupled to the needle. The sensing unit senses blood pressure inside the artery when the intravenous needle is inserted into the artery. The sensing unit is electrically coupled to the dialysis machine. Thus, the dialysis machine may monitor the blood pressure.

A method of associating a sensor with a blood vessel includes providing a sensor defining a passage therethrough and at least partially encircling the outside wall of the blood vessel with at least a portion of the sensor. The method further includes compressing the passage through the sensor until a portion of the blood vessel is flattened and mechanically coupling a pressure/force transducer to the outside wall of the blood vessel in an area of vessel wall flattening.

A method of performing medical procedure includes inserting a working channel into a bodily cavity, the working channel having an elongated shaft with a first lumen and a second lumen and an inflatable balloon positioned at a distal end of the shaft and having a mesh disposed an outer wall thereof, wherein the mesh creates a textured surface that prevents slippage of the balloon on surrounding tissue, advancing the working channel through the bodily cavity until the inflatable balloon reaches an anchoring position, anchoring the working channel at the anchoring position by supplying fluid via a pump until the balloon is inflated and the textured surface grips the surrounding tissue, inserting at least one medical instrument through the second lumen and performing the medical procedure, withdrawing the medical instrument from the second lumen, deflating the inflatable balloon, and withdrawing the working channel from the bodily cavity.

Systems are provided for determining the pulse wave velocity of blood flowing within a blood vessel. Disclosed systems may include first and second sensors at spaced apart locations in the blood vessel. The first sensor, in a first position, x1, in the vessel, r is configured to obtain a first area measurement, m1, of the vessel. The second sensor, in a second position, x2, in the vessel, is configured to obtain a second area measurement, m2, of the vessel. Disclosed systems may also include a processor configured to determine the pulse wave velocity of the vessel based on the first and second area measurements.

Systems and methods are described for denoising, or filtering out, unwanted noise or interference, from biological or physiological parameter signals or waveforms such as ECG signals caused by application of electromagnetic energy (e.g., electrical stimulation) in a vicinity of sensors configured to obtain the biological or physiological parameter signals.

In a method, system and device a member is provided around an aneurysm enabling treatment and monitoring of the aneurysm. In accordance with one embodiment the device is adapted to be adjusted postoperatively. Hereby the treatment can be efficiently carried out without having to perform surgery when adjusting the member.

A vascular graft includes a flexible substrate that can assume an unrolled configuration, in which the substrate extends along a main extension plane, and a rolled-up configuration, in which a first side of the substrate is facing radially inward and a second sideof the substrate is facing radially outward. At least one pressure sensing device is arranged on the first side of the substrate and includes a first electrode, a second electrode, and a piezoelectric element arranged between the two electrodes. At least one velocity sensing device is arranged on the first side of the substrate and a first electrode, a second electrode, and a piezoelectric element arranged between the electrodes. The graft can be used in a vascular graft system.

An intravascular MRI probe assembly for producing real time, three dimension imagery of an interior of a blood vessel includes a probe has diameter is sufficiently small to fit inside of a blood vessel of a human being. An x coil, a y coil and a pair of z coils is each positioned within the probe for producing a magnetic field to facilitate magnetic resonance imaging of an interior of the blood vessel. A first gradient echo coil, a second gradient coil, a shim coil and a magnet is each positioned within the probe. A conductor is coupled to the probe and the conductor extends away from the second end of the probe. Additionally, the conductor is electrically coupled to a magnetic resonance imaging processor to produce a three dimensional image of the interior of the blood vessel.