Optical perfusion sensor detector

摘要

A reflectance optical perfusion sensor may include at least one light source and a plurality of detector elements arranged in a planar or nonplanar configuration, such as a three-dimensional array. The detector elements may sense light emitted by the at least one light source and reflected by a blood mass of a patient, such as blood within a blood vessel. In some examples, the detector elements may be arranged such that photodetection surfaces of at least two of the detector elements are nonparallel. In addition to or instead of the nonplanar arrangement of detector elements, an optical perfusion sensor may include a detector array including a plurality of detector elements at least partially surrounding a light source. Varying the location and orientations of detector elements may help increase a quantity of light emitted by the at least one light source and reflected toward the optical perfusion sensor by blood.

主权项

1. An implantable medical device comprising:
an outer housing surface including a first portion configured having a planar profile and a second portion of the surface configured having a curvilinear profile; a light source disposed on the first portion having an emitter surface oriented in a first plane; and a plurality of detector elements disposed adjacent to the light source with at least a first of the detector elements being arranged on the first portion and at least a second of the detector elements being arranged on the second portion, each of the detector elements having a photodetection surface and the photodetection surface of the first detector element being oriented in the first plane and the photodetection surface of the second detector element being oriented in a second plane that is different from the first plane, wherein each detector element of the plurality of detector elements is configured to sense a reflection of light that is emitted by the emitter surface and reflected onto the respective detector element.