An optical probe is usable to determine at least one physiological parameter. A disposable portion of the optical probe comprises a bandage including adhesive on at least a portion of at least one face thereof. The bandage comprises a first modular housing component attached to a surface of the bandage at a first position. The first modular housing component is configured to receive and removably engage a modular probe emitter. The bandage comprises a second modular housing component attached to the surface of the bandage at a second position. The second position is spaced from the first position. The second modular housing component is configured to receive and removably engage a modular probe detector. The bandage is configured with sufficient flexibility that the first modular housing component attached to the bandage surface at the first position is positioned generally opposite the second modular housing component attached to the bandage surface at the second position when the bandage is positioned on an appendage of a patient for sensing a physiological parameter of the patient.
