Devices and methods for control of blood pressure

Apparatus comprising:

• an implantable device that is shaped to define struts arranged such that, when the device is unconstrained, along a continuous portion of the device having a length that is at least 5 mm, a maximum inter-strut distance defined by any set of two adjacent struts is more than 5 mm,
• the implantable device having a length of less than 80 mm when the device is unconstrained,
• the implantable device, at any location along the length of the device, defining a ratio of a perimeter of a cross-section of the device at the location to the cross-sectional area defined by the struts of the device at the longitudinal location, and
• the implantable device defining a maximum value of said ratio,
• the ratio being more than 80 percent of the maximum value of the ratio along more than 80 percent of a length of the device.

A method, comprising:

• providing an implantable device,
• the device being shaped to define struts arranged such that, when the device is unconstrained, over a continuous portion of the device having a length that is at least 5 mm, a maximum inter-strut distance defined by any set of two adjacent struts is more than 5 mm,
• a ratio of a perimeter of a cross-section of the device at any at any location along the length of the device, being more than 80 percent of the maximum value of the ratio along more than 50 percent of a length of the device;
• and
• implanting the device in a carotid artery of a subject.

A method, comprising:

• providing an implantable device that is shaped to define struts,
• the device being shaped such that over a continuous portion of the device having a length that is at least 5 mm, the device defines at least one circumferential region in which no struts are disposed, the region defining an arc of at least 30 degrees around a longitudinal axis of the device,
• a cross-sectional shape of the device at the region being shaped to define a major axis and a minor axis, at least when the device is in a non-constrained state thereof,
• the major axis of the cross-sectional shape being parallel to a plane defined by the region in which no struts are disposed, and the minor axis of the cross-sectional shape being perpendicular to the plane;
• and
• implanting the device in a carotid artery of a subject.