47 results about "Carotid artery.common" patented technology

Apparatus and methods for treatment of stroke are provided. In a preferred embodiment, the present invention disposes at least one catheter having a distal occlusive member in either the common carotid artery (CCA) or both the vertebral artery (VA) and the CCA on the hemisphere of the cerebral occlusion. Blood flow in the opposing carotid and / or vertebral arteries may be inhibited. Retrograde or antegrade flow may be provided through either catheter independently to effectively control cerebral flow characteristics. Under such controlled flow conditions, a thrombectomy device may be used to treat the occlusion, and any emboli generated are directed into the catheter(s).

Apparatus and methods for treatment of stroke are provided. In a preferred embodiment, the present invention disposes at least one catheter having a distal occlusive member in either the common carotid artery (CCA) or both the vertebral artery (VA) and the CCA on the hemisphere of the cerebral occlusion. Blood flow in the opposing carotid and / or vertebral arteries may be inhibited. Retrograde or antegrade flow may be provided through either catheter independently to effectively control cerebral flow characteristics. Under such controlled flow conditions, a thrombectomy device may be used to treat the occlusion, and any emboli generated are directed into the catheter(s).

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.

Apparatus and methods for treatment of stroke are provided. In a preferred embodiment, the present invention disposes at least one catheter having a distal occlusive member in the common carotid artery of the hemisphere of the cerebral occlusion. Retrograde flow may be provided through the catheter to effectively control cerebral flow characteristics. Under such controlled flow conditions, a thrombectomy device may be used to treat the occlusion, and any emboli generated are directed into the catheter.

A medical device having a catheter and one or more expandable constricting / occluding members. The catheter is adapted for use with therapeutic or diagnostic devices, including an angioplasty / stent catheter and an atherectomy catheter. A first constrictor / occluder mounted at the distal end of the catheter is adapted for placement in a brachiocephalic or subclavian artery. A second constrictor mounted proximal to the first constrictor / occluder is adapted for placement in the descending aorta. Pressure measuring devices may be included, and filters may be used to capture embolic debris. Methods of using the devices for preventing distal embolization during extracranial or intracranial carotid procedures or vertebral artery procedures by augmenting collateral cerebral circulation by coarctation of the aorta to enhance reversal of blood flow in an internal carotid artery, an external carotid artery, and / or a common carotid artery toward the subclavian artery are disclosed.

The invention provides a medical device having a catheter and one or more expandable constricting / occluding members. The catheter is adapted for use with therapeutic or diagnostic devices, including an angioplasty / stent catheter and an atherectomy catheter. The constrictor / occluder is mounted at the distal end of the catheter. Manometers may be mounted distal to one or more constrictors for measuring pressure distal to the constrictor(s). Methods of using the devices for preventing distal embolization during extracranial or intracranial carotid procedures or vertebral artery procedures by reversing blood flow in an internal carotid artery, an external carotid artery, and / or a common carotid artery toward the subclavian artery are disclosed.

Provided is an ultrasound diagnostic device which is configured to be connectable to an ultrasound probe, and with which IMT of a carotid artery wall is measured, comprising: a transmission unit which supplies to an ultrasound probe a transmission signal for causing the ultrasound probe to transmit ultrasound along a longitudinal cross-section of a carotid artery; a receiving unit which receives a signal based on the reflected ultrasound which the ultrasound probe receives from the carotid artery and generates a received signal; a blood vessel characteristic computation unit which, on the basis of the received signal, extracts location information which includes a location of each part which configures the carotid artery wall and / or a relative relation between the locations, and detects a boundary location between the common carotid artery and the bulb of the carotid artery on the basis of the longitudinal change of the carotid artery of the location information; an ROI establishment unit which, using the boundary location as a reference, establishes an ROI which defines the measurement range for measuring the IMT; and an IMT measurement unit which measures the IMT of the blood vessel wall which is included in the ROI.

Medical procedures and devices suitable for reducing the risk of embolic cerebrovascular events, including but not limited to cardioembolic stroke, that result from emboli entering the right or left common carotid artery. The invention uses a combination of intracranial flow diverting stent technologies and carotid stent technologies to achieve clinical objectives of embolic stroke prevention without thromboembolic and / or vascular stenosis complication. Such a stent has struts that generate high radial forces for endothelial apposition, and a mesh with interstices sufficiently small to prevent clinically significant-sized embolic material from passing therethrough from the common carotid artery into the internal carotid artery, but sufficiently large to enable blood and small clinically insignificant-sized embolic material to pass therethrough from the common carotid artery into the internal carotid artery.

The invention discloses a post treatment method of an M-shaped ultrasound image of a common carotid artery. The post treatment method comprises the following steps: after an ultrasonic wave is longitudinally cut and imaged, M-shaped ultrasound imaging is executed by selecting a sample line to obtain the M-shaped ultrasound image, an artery lumen region in the image is judged, and a row of pixel points transversely passing through the entire lumen region is used as a canal diameter measurement reference row; a mask mtehod is adopted to search in the near-field and far-field directions of each pixel point in the canal diameter measurement reference row, the demarcation point of the intima and the canal diameter is confirmed, the canal diameter change data of the common carotid artery positioned at the sample lines in several cardiac cycles and pulsed along the heart is obtained through calculation and the pulse wave velocity is estimated. The invention discloses a device for realizing the method. According to the post treatment method, the pulse wave velocity in the common carotid artery can be measured by a computer, the precision is obviously improved and the transfer efficiency is greatly promoted.

Disclosed is an arterial access sheath for introducing an interventional device into an artery. The arterial access sheath includes an elongated body sized and shaped to be transcervically introduced into a common carotid artery at an access location in the neck and an internal lumen in the elongated body having a proximal opening in a proximal region of the elongated body and a distal opening in a distal region of the elongated body. The internal lumen provides a passageway for introducing an interventional device into the common carotid artery when the elongated body is positioned in the common carotid artery. The elongated body has a proximal section and a distalmost section that is more flexible than the proximal section. A ratio of an entire length of the distalmost section to an overall length of the sheath body is one tenth to one half the overall length of the sheath body.

The invention relates to a common carotid artery cannula for adjusting and distributing blood perfusion flow and application. The common carotid artery cannula comprises a cannula body at a blood supply end and is characterized by further comprising a T-shaped or Y-shaped structured extracorporeal circulation perfusion plastic tube with a proximal end tube and a distal end tube for dividing flow and pressure, wherein the extracorporeal circulation perfusion plastic tube is communicated with the cannula body and formed on an overall structure. An included angle is formed between the proximal end tube of the Y-shaped structured perfusion tube and the cannula body at the blood supply end to distribute or adjust the blood perfusion flow. The common carotid artery cannula is applied to whole-body arterial perfusion and deep hypothermic circulatory arrest selective cerebral perfusion during extracorporeal circulation of a common carotid artery, and overcomes the shortcomings of an existing artery cannula and method. Carotid artery occlusion time is short during intubation and extubation, and cerebral blood supply is almost not affected, so that cerebral complications and the pain of patients are decreased. Obviously, the common carotid artery cannula is convenient to operate, surgical time is greatly shortened, so that cerebral ischemic time is shortened, the success rate of an aortic arch surgery is increased, and the common carotid artery cannula has a wide clinical application value.

An interventional catheter for treating an artery includes an elongated body sized and shaped to be transcervically introduced into a common carotid artery at an access location in the neck. The elongated body has an overall length such that the distal most section can be positioned in an intracranial artery and at least a portion of the proximal most section is positioned in the common carotid artery during use.