Publications using the OxyMon
Effects of midazolam and morphine on cerebral oxygenation and hemodynamics in ventilated premature infants
Background: Midazolam sedation and morphine analgesia are commonly used in ventilated premature infants. Objectives: To evaluate the effects of midazolam versus morphine infusion on cerebral oxygenation and hemodynamics in ventilated premature …
Effects of rapid versus slow infusion of sodium bicarbonate on cerebral hemodynamics and oxygenation in preterm infants
Background: Sodium bicarbonate (NaHCO3) is often used for correction of metabolic acidosis in preterm infants. The effects of NaHCO 3 administration on cerebral hemodynamics and oxygenation are not well known. Furthermore, there is no consensus on …
The relationship between two different mechanical cost functions and muscle oxygen consumption
Inverse-dynamic models often use cost functions to solve the load-sharing problem. Although it is often assumed that energy is minimised, most cost functions are based on mechanically related measures like muscle force or stress. The aim of this …
Back extensor muscle oxygenation and fatigability in healthy subjects and low back pain patients during dynamic back extension exertion
The purpose of this study was to assess if chronic low back pain patients have impaired paraspinal muscle O2 turnover and endurance capacity as compared to healthy control subjects during dynamic exercise. Middle-aged healthy male subjects (n = 12, …
Brain cell function during hypoxemia in near-term lambs: A near-infrared spectroscopy study
Background: Sufficient O2 supply to the brain is necessary for adequate cerebral energy metabolism, function and growth. Objectives: To elucidate the relation between changes in cerebral arterial O2 content and cerebral O2 supply and changes in the …
Effects of skin on bias and reproducibility of near-infrared spectroscopy measurement of cerebral oxygenation changes in porcine brain
The influence of skin on the bias and reproducibility of regional cerebral oxygenation measurements is investigated using cw near-infrared spectroscopy (NIRS). Receiving optodes are placed over the left and right hemispheres of a piglet (C3, C4 EEG …
Knee angle-dependent oxygen consumption during isometric contractions of the knee extensors determined with near-infrared spectroscopy
Fatigue resistance of knee extensor muscles is higher during voluntary isometric contractions at short compared with longer muscle lengths. In the present study we hypothesized that this would be due to lower energy consumption, at short muscle …
In vivo quantitative near-infrared spectroscopy in skeletal muscle and bone during rest and isometric exercise
The aim of this study was to investigate the performance of in vivo quantitative near- infrared spectroscopy (NIRS) in skeletal muscle at various workloads. NIRS was used for the quantitative measurement of O2 consumption (m _VO2) in the human flexor …
NIR spectroscopic measurement of local muscle metabolism during rhythmic, sustained, and intermittent handgrip exercise
The aim of this study was to investigate local muscle oxygen consumption (mVO2) during various protocols of isometric handgrip exercise. mVO2was measured by near-infrared spectroscopy (NIRS) during sustained, rhythmic, and intermittent isometric …
Noninvasive measurement of regional cerebral blood flow and regional cerebral blood volume by near-infrared spectroscopy and indocyanine green dye dilution
To find a suitable method for measuring regional cerebral blood flow (rCBF) rapidly at the bedside is still a matter of investigation. The purpose here was to develop a noninvasive method for bedside rCBF measurement and to validate it with a …
Muscle oxygen consumption, determined by NIRS, in relation to external force and EMG
Local oxygen consumption in a muscle (V̇O2) can be determined by near infrared spectroscopy (NIRS). In principle it should be possible to use this measure to validate musculoskeletal models. However, the relationship between V̇O2 and external force, …
Cerebral oxygenation responses to standing in elderly patients with predominantly diastolic dysfunction
Patients with left ventricular dysfunction may have different orthostatic responses of blood pressure (BP) and cerebral oxygenation than healthy elderly subjects. We investigated orthostatic changes in systemic haemodynamic variables and cerebral …
Transcranial oximetry using fast near infrared spectroscopy can detect failure of collateral blood supply in humans
We tested the hypothesis that transcranial oximetry by fast scanning near infrared spectroscopy can detect local desaturation of hemoglobin in arterial vessels of cerebral circulation with impaired blood supply. A total of 74 near infrared …
Experimental verification of conditions for near infrared spectroscopy (NIRS)
Objectives: in vitro assessment of the reproducibility and the optimal separation and position of the optodes in continuous wave (CW-) NIRS measurement of local inhomogeneities in absorption and/or scattering. Methods: a CW- NIRS system (OXYMON) was …
RSI: oxygen consumption, blood flow, and reoxygenation in patients suffering RSI measured by noninvasive optical spectroscopy
Background: Repetitive Strain Injury (RSI) is a major problem in nowadays health care and creates high financial costs and personal distress. Average prevalence rates in the Netherlands vary from 20-40% of the working population. Insight into the …
Lateral frontal cortex oxygenation changes during translation and language switching revealed by non-invasive near-infrared multi-point measurements
The organisation of language in the brain of multilingual people remains controversial. Using a high temporal resolution 12-channel near-infrared continuous wave spectroscopy system, we have demonstrated that it is possible to monitor non-invasively, …
Muscle tissue oxygenation as a functional tool in the follow up of dermatomyositis [9]
Download PDFPDF Letter Muscle tissue oxygenation as a functional tool in the follow up of dermatomyositis Free M C P van Beekvelt1, R A Wevers1, B G M van Engelen1, W N J M Colier2 Author affiliations http://dx.doi.org/10.1136/jnnp.73.1.93 Request …
In vivo quantitative near-infrared spectroscopy in skeletal muscle during incremental isometric handgrip exercise
The aim of this study was to investigate the performance of in vivo quantitative near-infrared spectroscopy (NIRS) in skeletal muscle at various workloads. NIRS was used for the quantitative measurement of O2 consumption (mVO2) in the human flexor …
Simultaneous measurements of cerebral oxygenation changes during brain activation by near-infrared spectroscopy and functional magnetic resonance imaging in healthy young and elderly subjects
Near infrared spectroscopy (NIRS) and functional magnetic resonance imaging (fMRI) both allow non-invasive monitoring of cerebral cortical oxygenation responses to various stimuli. To compare these methods in elderly subjects and to determine the …