Use this URL to cite or link to this record in EThOS:
Title: Feasibility of non-contact photoplethysmography
Author: Cheang, Peck-Yeng (Sharon)
ISNI:       0000 0004 2685 2658
Awarding Body: Loughborough University
Current Institution: Loughborough University
Date of Award: 2008
Availability of Full Text:
Access from EThOS:
Access from Institution:
This thesis explores and investigates the feasibility of a non-contact photoplethysmography system operating in both transmission and reflection modes. Several issues are addressed in the implementation of the non-contact system, including the dynamic range of PPG signals, ambient artefacts and effects of direct coupling, which is light that is detected without any interaction with the measured tissue area. Plethysmography has been used in a range of biomedical applications to study blood volume changes. All current applications employ contact probes, where the transducers are positioned directly on the tissue surface. Non-contact measurements, where the transducers have no direct contact with the tissue surface, i.e. skin, are in demand for clinical benefits. Measurements by non-contact photoplethysmography can be obtained from any tissue since it is not probe limited, can be used on patients with bums as the probe does not touch the skin, and can reduce anxiety in patients, as they are not wired to any equipment.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available