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Pulse oximetry perfusion index

K Chung, K H Kim, E D Kim
BACKGROUND: Discrepancy between a patient's subjective thermal symptoms and objective measured temperature value is common in complex regional pain syndrome (CRPS) in clinical settings. For that reason, the diagnostic validity of a single temperature measurement method has been criticised. Several studies showed that the perfusion index (PI), which is derived from pulse oximetry, is a more sensitive and earlier indicator of sympathetic blockade than temperature measurement. METHODS: Forty-six participants (CRPS group, n=23; healthy control group, n=23) were enrolled...
November 2018: British Journal of Anaesthesia
Feiyi Fan, Yuepeng Yan, Kun Zhao, Fei Long, Hao Zhang, Feiyi Fan, Yuepeng Yan, Kun Zhao, Fei Long, Hao Zhang
The accuracy of noninvasive oxygen saturation (SpO2 ), which is defined by the measurements based on photoplethysmographic (PPG) signals, is intensively affected by motion artifacts (MAs) and low perfusion. This study introduces a novel approach called ESPRIT-MLT to measure SpO2 when such interferences are present. In contrast to previous studies, the work focuses on the harmonic model of the PPG signal and the probability model of results from harmonic analysis. The optimized parametric ESPRIT method is applied to improve the accuracy of harmonic power estimation, and the maximum likelihood SpO2 tracking (MLT) technique is proposed to track the most probable uncontaminated harmonic of heart rate frequency...
July 2018: IEEE Journal of Biomedical and Health Informatics
Ozgun Uygur, Ozge Altun Koroglu, Erturk Levent, Merve Tosyali, Mete Akisu, Mehmet Yalaz, Nilgun Kultursay
BACKGROUND: Approximately 25% of congenital heart diseases (CHD) are estimated to be critical and require an intervention. In this study, we aimed to investigate the additional value of peripheral perfusion index (PPI) measurements to pulse oximetry screening for critical CHD (CCHD). METHODS: Infants born at Ege University Hospital between May 2013 and September 2015 were prospectively included in the study. In addition to physical examination, pre- and postductal oxygen saturations and PPI values were measured with a new generation pulse oximeter before discharge from the hospital...
February 2019: Pediatrics and Neonatology
Abdelmoneim Adel, Wael Awada, Bassant Abdelhamid, Heba Omar, Omnia Abd El Dayem, Ahmed Hasanin, Ashraf Rady
The evolution of non-invasive hemoglobin measuring technology would save time and improve transfusion practice. The validity of pulse co-oximetry hemoglobin (SpHb) measurement in the perioperative setting was previously evaluated; however, the accuracy of SpHb in different volume statuses as well as in different perfusion states was not well investigated. The aim of this work is to evaluate the accuracy and trending of SpHb in comparison to laboratory hemoglobin (Lab-Hb) during acute bleeding and after resuscitation...
December 2018: Journal of Clinical Monitoring and Computing
Yong-Hee Park, Seho Lim, Hyun Kang, Hwa-Yong Shin, Chong Wha Baek, Young Cheol Woo
We measured noninvasive hemoglobin (SpHb) levels during the pre-anesthesia visit in patients planning elective surgery. Differences between SpHb and laboratory-measured hemoglobin (Hblab ) were compared between adult and pediatric patients. In the pre-anesthesia visiting office, we routinely monitor noninvasive Hb levels with oxygen saturation and heart rate using Masimo Radical-7® Pulse CO-Oximetry (Masimo Corp., Irvine, CA, USA). We attached the R1 20 (body weight, 10-50 kg) or R1 25 (body weight > 30 kg) probe on the index finger...
October 2018: Journal of Clinical Monitoring and Computing
Lukas P Mileder, Tessa Müller, Nariae Baik-Schneditz, Jasmin Pansy, Bernhard Schwaberger, Corinna Binder-Heschl, Berndt Urlesberger, Gerhard Pichler
OBJECTIVE: In neonates, a patent ductus arteriosus (DA) may be associated with severe complications. We used near-infrared spectroscopy (NIRS) with venous occlusion to investigate the influence of an open DA on peripheral muscle oxygenation/perfusion in preterm neonates. APPROACH: We analyzed secondary outcome parameters collected as part of prospective observational studies. NIRS measurements were performed between the first and third day of life. Arterial oxygen saturation (SaO2 ) and heart rate (HR) were monitored by pulse oximetry on the ipsilateral foot...
December 28, 2017: Physiological Measurement
S Kuwata, K Suehiro, T Juri, S Tsujimoto, A Mukai, K Tanaka, T Yamada, T Mori, K Nishikawa
BACKGROUND: Spinal anaesthesia carries a risk of hypotension. We hypothesized that pleth variability index and perfusion index would assess maternal volume status, and thus, allow identification of patients at higher risk of developing hypotension after spinal anaesthesia for caesarean delivery. METHODS: Fifty patients undergoing elective caesarean delivery were enrolled. All patients received spinal anaesthesia with 0.5% hyperbaric bupivacaine (10 mg) and fentanyl (10 mcg)...
January 2018: Acta Anaesthesiologica Scandinavica
John B West, G Kim Prisk
Measurement of the gas exchange efficiency of the lung is often required in the practice of pulmonary medicine and in other settings. The traditional standard is the values of the PO2, PCO2, and pH of arterial blood. However arterial puncture requires technical expertise, is invasive, uncomfortable for the patient, and expensive. Here we describe how the composition of expired gas can be used in conjunction with pulse oximetry to obtain useful measures of gas exchange efficiency. The new procedure is noninvasive, well tolerated by the patient, and takes only a few minutes...
January 2018: Respiratory Physiology & Neurobiology
Carlo Dani
No abstract text is available yet for this article.
September 2017: Journal of Pediatrics
Yosuke Taguchi, Shigeharu Hosono, Kazunori Kayama, Ryota Kato, Kotaro Hine, Nobuhiko Nagano, Kayo Yoshikawa, Shigeru Takahashi, Shori Takahashi
BACKGROUND: During neonatal resuscitation, careful oxygenation is needed. Pulse oximetry is recommended to evaluate the need for oxygenation, but it is not clear whether peripheral perfusion is adequate for the evaluation of arterial oxygen saturation (SpO2 ). Additionally, there has been no study on the changes in SpO2 immediately after birth in Japan, despite the indispensable need for definitive oxygenation criteria. METHODS: A prospective observational study was performed in neonates at gestational age 35-41 weeks...
October 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
Eric I-Hun Jeng, Nikolaus Gravenstein, Charles T Klodell
BACKGROUND: Endoscopic thoracic sympathectomy (ETS) is indicated for refractory hyperhidrosis. The pulse oximetry-derived perfusion index (PI) quantifies pulsatile blood flow at the oximeter. Thoracic sympathectomy increases blood flow; thus we postulate it will reliably increase PI. We evaluated the ipsilateral finger PI as a predictor of successful sympathectomy during ETS. METHODS: After institutional review board approval and informed consent, 100 adult patients undergoing bilateral ETS were studied...
August 2017: Annals of Thoracic Surgery
Carmen Hinojosa-Laborde, Jessie Renee D Fernandez, Gary W Muniz, Corinne D Nawn, Rebecca K Burns, Thuan H Le, Kathy B Porter, John T Hardy, Victor A Convertino
BACKGROUND: The measurement of the body's capacity to compensate for reduced blood volume can be assessed with a compensatory reserve measurement (CRM). The CRM, which is calculated from changes in features of the arterial waveform, represents the integration of compensatory mechanisms during states of low tissue perfusion and oxygenation, such as hemorrhage. This study was designed to test the hypothesis that pain which activates compensatory mechanisms and analgesia that result in reduced blood pressure are associated with lower compensatory reserve...
July 2017: Journal of Trauma and Acute Care Surgery
Federico Schena, Irene Picciolli, Massimo Agosti, Antonio Alberto Zuppa, Gianvincenzo Zuccotti, Luciana Parola, Giulia Pomero, Giorgio Stival, Markus Markart, Silvia Graziani, Luigi Gagliardi, Cristina Bellan, Simona La Placa, Giuseppe Limoli, Gabriella Calzetti, Andrea Guala, Enza Bonello, Fabio Mosca
OBJECTIVE: To evaluate the efficacy of combined pulse oximetry (POX) and perfusion index (PI) neonatal screening for severe congenital heart defects (sCHD) and assess different impacts of screening in tertiary and nontertiary hospitals. STUDY DESIGN: A multicenter, prospective study in 10 tertiary and 6 nontertiary maternity hospitals. A total of 42 169 asymptomatic newborns from among 50 244 neonates were screened; exclusion criteria were antenatal sCHD diagnosis, postnatal clinically suspected sCHD, and neonatal intensive care unit admission...
April 2017: Journal of Pediatrics
Junichi Saito, Masato Kitayama, Erika Amanai, Kentaro Toyooka, Kazuyoshi Hirota
PURPOSE: Several factors affect the accuracy of non-invasive continuous hemoglobin concentration (SpHb) measurements. We had previously shown an increase in the perfusion index (PI) following induction of anesthesia which was associated with an increase in the difference between SpHb and total hemoglobin (tHb) (SpHb-tHb). We hypothesized that blunting the increase in PI by maintaining blood pressure during induction of anesthesia would improve the agreement between SpHb and tHb measurements...
April 2017: Journal of Anesthesia
Makoto Sato, Takayuki Kunisawa, Atsushi Kurosawa, Tomoki Sasakawa
STUDY OBJECTIVE: Hypertension or hypotension in patients receiving continuous infusions of dexmedetomidine (DEX) is often due to changes in vascular resistance caused by α2 receptor stimulation. We investigated whether baseline perfusion index (PI) and pleth variability index (PVI), derived from pulse oximetry readings, could predict DEX-induced changes in the hemodynamic status in spontaneously breathing patients. DESIGN: Observational study. SETTING: Operating room...
November 2016: Journal of Clinical Anesthesia
Anirudh Krishnamohan, Viraj Siriwardana, Justin J Skowno
BACKGROUND: Peripheral vasodilation is a well-recognized side effect of general anesthesia, and induces changes in the amplitude of the pulse plethysmograph (PPG) waveform. This can be continuously quantitaed using the Perfusion Index (PI), a ratio of the pulsatile to nonpulsatile signal amplitude in the PPG waveform. We hypothesized that the perfusion index would rise with the induction of anesthesia in children, and fall with emergence, and performed a prospective, observational study to test this...
November 2016: Paediatric Anaesthesia
Rüçhan Akar, Serkan Durdu, Mutlu Arat, Neyyir Tuncay Eren, Öder Arslan, Tümer Çorapçıoğlu, Tanzer Sancak, Burcu Uzun, Metin Kİr, Osman İlhan, Ümit Özyurda
Bone marrow implantation into ischaemic limbs could enhance angiogenesis by supplying endothelialprogeniter cells and angiogenic cytokinesot factors. We investigated efficacy and safety of autologousimplantation of bonemarrow-mononuclearcells (BMMC)in patients with ischaemic limbs due to Buerger's disease. We commence daciinical study to test cell therapy with autologous BMMC in patients with ischaemic limbs at the University of Ankara School of Medicine. In order for the patients to qualify for BMMC implantation, they should have critical limb ischaemia define das ischaemic rest painin a limb with or without non healing ulcers, should not respond to previous iloprost infusions and smoking cessation six months prior to evaluation and should not be candidates for nonsurgicalor surgical revascularisation...
March 5, 2004: Turkish Journal of Haematology: Official Journal of Turkish Society of Haematology
Gerardo Tusman, Stephan H Bohm, Fernando Suarez-Sipmann
Pulse oximetry is an undisputable standard of care in clinical monitoring. It combines a spectrometer to detect hypoxemia with a plethysmograph for the diagnosis, monitoring, and follow-up of cardiovascular diseases. These pulse oximetry capabilities are extremely useful for assessing the respiratory and circulatory status and for monitoring of mechanically ventilated patients. On the one hand, the key spectrography-derived function of pulse oximetry is to evaluate a patient's gas exchange that results from a particular ventilatory treatment by continuously and noninvasively measuring arterial hemoglobin saturation (SpO2)...
January 2017: Anesthesia and Analgesia
Hyoun-Joong Kong, Teo Jeon Shin, Hong-Keun Hyun, Young-Jae Kim, Jung-Wook Kim, Won-Jun Shon
OBJECTIVE: Evaluation of pulp vitality is an important diagnostic procedure in dentistry. Conventional techniques for measurement of pulp vitality, including thermal stimulation, electrical stimulation, or direct dentin stimulation, are frequently associated with false positive or false negative results. Recently, oxygen saturation from pulse oximetry has been utilized in the evaluation of pulp vitality. Perfusion index (PI) data calculated from photoplethysmography have been widely used to evaluate peripheral perfusion...
July 2016: Acta Odontologica Scandinavica
T Y Abay, P A Kyriacou
Monitoring changes in blood volume, blood flow, and oxygenation in tissues is of vital importance in fields such as reconstructive surgery and trauma medicine. Near infrared spectroscopy (NIRS), laser Doppler (LDF) flowmetry, photoplethysmography (PPG), and pulse oximetry (PO) contribute to such fields due to their safe and noninvasive nature. However, the techniques have been rarely investigated simultaneously or altogether. The aim of this study was to investigate all the techniques simultaneously on healthy subjects during vascular occlusion challenges...
April 2016: Physiological Measurement
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