Items where Author is "Langford, R. M."
Article
Belhaj, A., Phillips, J. P., Kyriacou, P. A. & Langford, R. M. (2016). Comparison of non-invasive peripheral venous saturations with venous blood co-oximetry. Journal of Clinical Monitoring and Computing, 31(6), pp. 1213-1220. doi: 10.1007/s10877-016-9959-9
Shafqat, K., Langford, R. M. & Kyriacou, P. A. (2015). Estimation of instantaneous venous blood saturation using the Photoplethysmograph (PPG) waveform. Physiological Measurement, 36(10), pp. 2203-2214. doi: 10.1088/0967-3334/36/10/2203
Phillips, J. P., Cibert-Goton, V., Langford, R. M. & Shortland, P. J. (2013). Perfusion assessment in rat spinal cord tissue using photoplethysmography and laser Doppler flux measurements. Journal of Biomedical Optics, 18(3), article number 037005. doi: 10.1117/1.jbo.18.3.037005
Phillips, J. P., Belhaj, A., Langford, R. M. & Kyriacou, P. A. (2013). Effect of respiratory-induced intensity variations on finger SpO(2) measurements in volunteers. 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), pp. 3937-3940. doi: 10.1109/EMBC.2013.6610406
Belhaj, A., Phillips, J. P., Kyriacou, P. A. & Langford, R. M. (2013). Non-invasive optical estimation of local venous oxygen saturation. British Journal of Anaesthesia, 110(5), pp. 877-878. doi: 10.1093/bja/aes490
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2012). A new fibre optic pulse oximeter probe for monitoring splanchnic organ arterial blood oxygen saturation. Computer Methods and Programs in Biomedicine, 29(3), pp. 387-390. doi: 10.1007/978-3-642-13039-7_97
Phillips, J. P., Belhaj, A., Shafqat, K. , Langford, R. M., Shelley, K. H. & Kyriacou, P. A. (2012). Modulation of finger photoplethysmographic traces during forced respiration: venous blood in motion?. 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), pp. 3644-3647. doi: 10.1109/EMBC.2012.6346756
Shafqat, K., Kyriacou, P. A., Pal, S. K. & Langford, R. M. (2011). Instantaneous venous oxygenation estimation using the Photoplethysmograph (PPG) waveform. Journal of Physics: Conference Series, 307(1), article number e012018. doi: 10.1088/1742-6596/307/1/012018
Phillips, J. P., Langford, R. M., Chang, S. H. , Kyriacou, P. A. & Jones, D. P. (2011). Photoplethysmographic measurements from the esophagus using a new fiber-optic reflectance sensor. Journal of Biomedical Optics (JBO), 16(7), article number 077005. doi: 10.1117/1.3598858
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2011). An in vivo investigation of photoplethysmographic signals and preliminary pulse oximetry estimation from the bowel using a new fiberoptic sensor. Anesthesia and Analgesia, 112(5), pp. 1104-1109. doi: 10.1213/ane.0b013e31820f8df3
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2011). Investigation of photoplethysmographic signals and blood oxygen saturation values obtained from human splanchnic organs using a fiber optic sensor. Journal of Clinical Monitoring and Computing, 25(4), pp. 245-255. doi: 10.1007/s10877-011-9302-4
Phillips, J. P., Langford, R. M., Chang, S. H. , Maney, K., Kyriacou, P. A. & Jones, D. P. (2010). Cerebral Arterial Oxygen Saturation Measurements Using a Fiber-Optic Pulse Oximeter. Neurocritical Care, 13(2), pp. 278-285. doi: 10.1007/s12028-010-9349-y
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2010). Measurement of splanchnic photoplethysmographic signals using a new reflectance fiber optic sensor. Journal of Biomedical Optics, 15(2), article number 027012. doi: 10.1117/1.3374355
Phillips, J. P., Kyriacou, P. A., George, K. & Langford, R. M. (2010). Optical measurement of blood flow changes in spinal cord injury. Journal of Physics: Conference Series, 238(1), article number 12060. doi: 10.1088/1742-6596/238/1/012060
Chang, S. H., Maney, K., Phillips, J. P. , Langford, R. M. & Mehta, V. (2010). A comparison of the respiratory effects of oxycodone versus morphine: a randomised, double-blind, placebo-controlled investigation. Anaesthesia, 65(10), pp. 1007-1012. doi: 10.1111/j.1365-2044.2010.06498.x
Kyriacou, P. A., Crerar-Gilbert, A., Langford, R. M. & Jones, D. P. (2009). Measurement of photoplethysmographic signals in human abdominal organs. Measurement, 42(7), pp. 1027-1031. doi: 10.1016/j.measurement.2009.03.004
Hickey, M., Kyriacou, P. A., Samuels, N. , Randive, N., Chang, S. H., Maney, K. & Langford, R. M. (2009). Photoplethysmographic signals recorded from human abdominal organs using a fibreoptic probe. British Journal of Anaesthesia, 102(4), 572P-584P. doi: 10.1093/bja/aep007
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2009). In-Vivo Evaluation of a Fiber-Optic Splanchnic Photoplethysmographic Sensor during Open Laparotomy. Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE, 2009, pp. 1505-1508. doi: 10.1109/iembs.2009.5334159
Phillips, J. P., Langford, R. M., Chang, S. H. , Maney, K., Kyriacou, P. A. & Jones, D. P. (2009). An oesophageal pulse oximetry system utilising a fibre-optic probe. Journal of Physics: Conference Series, 178(1), article number 12021. doi: 10.1088/1742-6596/178/1/012021
Phillips, J. P., Langford, R. M., Kyriacou, P. A. & Jones, D. P. (2008). Preliminary evaluation of a new fibre-optic cerebral oximetry system. Physiological Measurement, 29(12), pp. 1383-1396. doi: 10.1088/0967-3334/29/12/003
Phillips, J. P., Kyriacou, P. A., Jones, D. P. , Shelley, K. H. & Langford, R. M. (2008). Pulse oximetry and photoplethysmographic waveform analysis of the esophagus and bowel. Current opinion in anesthesiology, 21(6), pp. 779-783. doi: 10.1097/aco.0b013e328317794d
Kyriacou, P. A., Jones, D. P., Langford, R. M. & Petros, A. J. (2008). A pilot study of neonatal and pediatric esophageal pulse oximetry. Anesthesia and Analgesia, 107(3), pp. 905-908. doi: 10.1213/ane.0b013e31817e67d1
Kyriacou, P. A., Jones, D. P., Langford, R. M. & Petros, A. J. (2007). Pilot study in neonatal and pediatric oesophageal pulse oximetry. Anesthesia and Analgesia, 105(6), S106-S107. doi: 10.1213/01.ane.0000290771.60068.d5
Phillips, J. P., Jones, D. P., Kyriacou, P. A. , Chang, S. H., Maney, K. & Langford, R. M. (2007). Preliminary Evaluation of a Fiber Optic Cerebral Oximetry System in Patients Undergoing Neurosurgery. Anesthesia and Analgesia, 105(6), S113-S114. doi: 10.1213/01.ane.0000290771.60068.d5
Phillips, J. P., Kyriacou, P. A., Chang, S. H. , Maney, K., George, K. & Langford, R. M. (2007). Photoplethysmographic measurements from central nervous system tissue. Journal of Physics: Conference Series, 85(1), article number 12029. doi: 10.1088/1742-6596/85/1/012029
Shafqat, K., Jones, D. P., Langford, R. M. & Kyriacou, P. A. (2006). Filtering techniques for the removal of ventilator artefact in oesophageal pulse oximetry. Medical & Biological Engineering & Computing, 44(8), pp. 729-737. doi: 10.1007/s11517-006-0089-2
Phillips, J. P., Langford, R. M., Kyriacou, P. A. & Jones, D. P. (2006). Optical fibre catheter photoplethysmograph. Measurement & Control, 39(3), pp. 84-87. doi: 10.1177/002029400603900304
Pal, S. K., Kyriacou, P. A., Kumaran, S. , Fadheel, S., Emamdee, R., Langford, R. M. & Jones, D. P. (2005). Evaluation of oesophageal reflectance pulse oximetry in major burns patients. Burns, 31(3), pp. 337-341. doi: 10.1016/j.burns.2004.10.025
Kyriacou, P. A., Powell, S. L., Jones, D. P. & Langford, R. M. (2003). Evaluation of oesophageal pulse oximetry in patients undergoing cardiothoracic surgery. Anaesthesia, 58(5), pp. 422-427. doi: 10.1046/j.1365-2044.2003.03091.x
Kyriacou, P. A., Powell, S., Langford, R. M. & Jones, D. P. (2002). Esophageal pulse oximetry utilizing reflectance photoplethysmography. IEEE Transactions on Biomedical Engineering, 49(11), pp. 1360-1368. doi: 10.1109/tbme.2002.804584
Kyriacou, P. A., Wardhaugh, A., Jones, D. P. , Langford, R. M. & Petros, A. J. (2002). Investigation of photoplethysmographic signals in neonatal and paediatric patients. Journal of Intensive Care Medicine, 28(S1), S86-S120. doi: 10.1007/s00134-002-1455-7
Kyriacou, P. A., Powell, S., Langford, R. M. & Jones, D. P. (2002). Investigation of oesophageal photoplethysmographic signals and blood oxygen saturation measurements in cardiothoracic surgery patients. Physiological Measurement, 23(3), pp. 533-545. doi: 10.1088/0967-3334/23/3/305
Crerar-Gilbert, A. J., Kyriacou, P. A., Jones, D. P. & Langford, R. M. (2002). Assessment of photoplethysmographic signals for the determination of splanchnic oxygen saturation in humans. Anaesthesia, 57(5), pp. 442-445. doi: 10.1046/j.0003-2409.2001.02453.x
Powell, S., Kyriacou, P. A., Jones, D. P. & Langford, R. M. (2001). Investigation into the use of a new oesophageal pulse oximeter in cardiothoracic surgery patients. British Journal of Anaesthesia, 87(4), 654P-675P. doi: 10.1093/bja/87.4.654
Kyriacou, P. A., Moye, A. R., Choi, D. M. , Langford, R. M. & Jones, D. P. (2001). Investigation of the human oesophagus as a new monitoring site for blood oxygen saturation. Physiological Measurement, 22(1), pp. 223-232. doi: 10.1088/0967-3334/22/1/325
Kyriacou, P. A., Moye, A. R., Gregg, A. , Choi, D. M., Langford, R. M. & Jones, D. P. (1999). A system for investigating oesophageal photoplethysmographic signals in anaesthetised patients. Medical & Biological Engineering & Computing, 37(5), pp. 639-643. doi: 10.1007/bf02513360
Kyriacou, P. A., Choi, D. M., Moye, A. R. , Langford, R. M. & Jones, D. P. (1999). Design and evaluation of a new electro-optical system for monitoring oesophageal photoplethysmographs. Medical & Biological Engineering & Computing, 37(PART 1), pp. 346-347.
Moye, A. R., Kyriacou, P. A., Gregg, A. , Jones, D. P. & Langford, R. M. (1999). Photoplethysmographic (PPG) signals recorded from the human oesophagus. British Journal of Anaesthesia, 82, pp. 17-18.
Book Section
Zaman, T., Kyriacou, P. A., Belhaj, A. , Langford, R. M. & Patel, H. (2012). Development of a Reflectance Photoplethysmographic Sensor used for the Assessment of Perfusion of Free Jejunum Flaps: a case report. In: Kyriacou, E., Promponas, V., Loizou, C. , Schizas, C. N. & Pattichis, C. S. (Eds.), 2012 IEEE 12th International Conference on Bioinformatics & Bioengineering (BIBE). . IEEE. doi: 10.1109/BIBE.2012.6399642
Conference or Workshop Item
Phillips, J. P., Belhaj, A., Langford, R. M. & Kyriacou, P. A. (2013). Effect of respiratory-induced intensity variations on finger SpO2 measurements in volunteers. Paper presented at the 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC’13), 03-07-2013 - 07-07-2013, Osaka, Japan. doi: 10.1109/EMBC.2013.6610406
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2010). Preliminary assessment of abdominal organ perfusion utilizing a fiber optic photoplethysmographic sensor. In: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference. 2010 Annual International Conference of the IEEE, Aug. 31 2010-Sept. 4 2010, Buenos Aires. doi: 10.1109/IEMBS.2010.5627751
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2010). A New Fibre Optic Pulse Oximeter Probe for Monitoring Splanchnic Organ Arterial Blood Oxygen Saturation. Paper presented at the The 12th Mediterranean Conference on Medical and Biological Engineering and Computing, 27-05-2010 - 30-05-2010, Chalkidiki, Greece.
Phillips, J. P., Langford, R. M., Chang, S. H. , Maney, K., Kyriacou, P. A. & Jones, D. P. (2009). Evaluation of a Fiber-optic Esophageal Pulse Oximeter. In: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference. EMBC 2009. Annual International Conference of the IEEE, 3-6 Sept. 2009, Minneapolis, MN.
Phillips, J. P., George, K., Kyriacou, P. A. & Langford, R. M. (2009). Investigation of Photoplethysmographic Changes using a Static Compression Model of Spinal Cord Injury. In: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference. EMBC 2009. Annual International Conference of the IEEE, 3-6 Sept. 2009, Minneapolis, MN. doi: 10.1109/IEMBS.2009.5334166
Phillips, J. P., Langford, R. M., Chang, S. H. , Maney, K., Kyriacou, P. A. & Jones, D. P. (2009). Measurements of Cerebral Arterial Oxygen Saturation using a Fiber-optic Pulse Oximeter. In: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference. EMBC 2009. Annual International Conference of the IEEE, 3-6 Sept. 2009, Minneapolis, MN. doi: 10.1109/IEMBS.2009.5334604
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2009). Development and evaluation of a photometric fibre-optic sensor for monitoring abdominal organ photoplethysmographs and blood oxygen saturation. In: SPIE Proceedings. 20th International Conference on Optical Fibre Sensors doi: 10.1117/12.834307
Hickey, M., Samuels, N., Randive, N. , Langford, R. M. & Kyriacou, P. A. (2009). Photoplethysmographic signals from human splanchnic organs using a new fibre-optic sensor. Paper presented at the Annual National Conference of the Institute of Physics and Engineering in Medicine (IPEM), 14-16 Sep 2009, Liverpool, UK.
Nikolic, S., Mehta, V., Ratcliffe, S. , Phillips, J. P., Kyriacou, P. A. & Langford, R. M. (2008). A prospective, randomised, double-blind, double-dummy, placebo-controlled trial to assess the respiratory effects of buprenorphine versus morphine in anaesthetised patients. Paper presented at the The 14th World Congress of Anaesthesiologists, 2-7 Mar 2008, Cape Town, South Africa.
Kyriacou, P. A., Crerar-Gilbert, A., Langford, R. M. & Jones, D. P. (2006). Electro-optical techniques for the investigation of photoplethysmographic signals in human abdominal organs. Paper presented at the SECOND INTERNATIONAL CONFERENCE ON OPTICAL AND LASER DIAGNOSTICS, 11-14 Sep 2005, London, UK. doi: 10.1088/1742-6596/45/1/033
Phillips, J. P., Kyriacou, P. A. & Langford, R. M. (2006). Calibration of an optical fibre cerebral oximeter using a Monte Carlo model. In: Proceedings of the 12th Annual Scientific Meeting of the Institute of Physics and Engineering in Medicine. 12th Annual Scientific Meeting of the Institute of Physics and Engineering in Medicine, Sept 2006, Cambrdige, UK.
Phillips, J. P., Kyriacou, P. A., George, K. , Priestley, J. V. & Langford, R. M. (2006). An optical fiber photoplethysmographic system for central nervous system tissue. In: Proceedings of the 28th Annual Conference of the IEEE Engineering in Medicine and Biology Society. 28th Annual Conference of the IEEE Engineering in Medicine and Biology Society, 31 Aug - 3 Sep 2006, New York, USA.
Shafqat, K., Kyriacou, P. A., Langford, R. M. & Jones, D. P. (2004). FIR Filter Design for Removal of Ventilator Artefact in Oesophageal Photoplethysmographic Signals. Paper presented at the The X Mediterranean Conference on Medical and Biological Engineering and Computing (MEDICON 2004), 31 Jul-04 Aug 2004, Naples, Italy.
Kyriacou, P. A., Pal, S. K., Langford, R. M. & Jones, D. P. (2004). Investigation of oesophageal pulse oximetry in burns patients. Paper presented at the Annual National Conference of the Institute of Physics and Engineering in Medicine (IPEM), 6-8 Sep 2004, York, UK.
Shafqat, K., Kyriacou, P. A., Langford, R. M. & Jones, D. P. (2004). Multirate Processing for Removal of Ventilator Artefact in Oesophageal PPG Signals. Paper presented at the Annual National Conference of the Institute of Physics and Engineering in Medicine (IPEM), 6-8 Sep 2004, York, UK.
Phillips, J. P., Langford, R. M., Kyriacou, P. A. & Jones, D. P. (2004). Optical Fibre Catheter Photoplethysmography. Paper presented at the The X Mediterranean Conference on Medical and Biological Engineering and Computing, 31 Jul - 5 Aug 2004, Ischia, Italy.
Kyriacou, P. A., Jones, D. P., Langford, R. M. & Petros, A. J. (2003). Oesophageal Pulse Oximetry in Neonatal and Paediatric Patients. In: UNSPECIFIED . ISBN 1903613191
Kyriacou, P. A., Langford, R. M., Powell, S. & Jones, D. P. (2002). Oesophageal Pulse Oximetry: A New Monitoring Site. Paper presented at the Annual National Conference of the Institute of Physics and Engineering in Medicine (IPEM), 2002, Durham, UK.
Kyriacou, P. A., Crerar-Gilbert, A., Langford, R. M. & Jones, D. P. (2001). Investigation of Photoplethysmographic Signals in Human Visceral Organs. In: Proceedings of the IX Mediterranean Conference on Medical and Biological Engineering and Computing (MEDICON 2001). IX Mediterranean Conference on Medical and Biological Engineering and Computing (MEDICON 2001), 12-14 Jun 2001, Pula, Croatia.
Kyriacou, P. A., Crerar-Gilbert, A., Langford, R. M. & Jones, D. P. (2000). A new system for estimating human splanchnic oxygen saturation. Paper presented at the Annual National Conference of the Institute of Physics and Engineering in Medicine (IPEM), 13-14 Sep 2000, Southampton, UK.
Kyriacou, P. A., Moye, A. R., Gregg, A. , Choi, D. M., Langford, R. M. & Jones, D. P. (1999). Can the Human Oesophagus give adequate PPG Signals for Pulse Oximetry? In: Proceedings of 5th Annual National Conference of the Institute of Physics and Engineering in Medicine (IPEM). 5th Annual National Conference of the Institute of Physics and Engineering in Medicine (IPEM), Sep 1999, Nottingham, UK.
Kyriacou, P. A., Gregg, A., Langford, R. M. & Jones, D. P. (1998). Investigation of photoplethysmographic signals in the human oesophagus. Paper presented at the VIII Mediterranean Conference on Medical and Biological Engineering and Computing, 14 Jun - 17 Jun 1998, Lemesos, Cyprus.
Kyriacou, P. A., Gregg, A., Langford, R. M. & Jones, D. P. (1998). Investigation of the characteristics of photoplethysmographic signals in the human oesophagus in anaesthetised patients undergoing routine surgery. In: Proceedings of the 4th Annual National Conference of the Institute of Physics & Engineering in Medicine (IPEM). 4th Annual National Conference of the Institute of Physics & Engineering in Medicine (IPEM), Sep 1998, Brighton, UK.