scholarly journals Intracranial Hematoma Detection by Near Infrared Spectroscopy in a Helicopter Emergency Medical Service: Practical Experience

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Patrick Schober ◽  
Sebastiaan M. Bossers ◽  
Lothar A. Schwarte
Keyword(s):  
Infrared Spectroscopy ◽  
Healthy Volunteers ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Improve Patient Care ◽  
Helicopter Emergency Medical Service ◽  
Intracranial Hematoma ◽  
Emergency Medical ◽  
Intracranial Hematomas ◽  
First Time

In (helicopter) emergency medical services, (H)EMS, the prehospital detection of intracranial hematomas should improve patient care and the triage to specialized neurosurgical hospitals. Recently, noninvasive detection of intracranial hematomas became possible by applying transcranial near infrared spectroscopy (NIRS). Herein, second-generation devices are currently available, for example, the Infrascanner 2000 (Infrascan), that appear suited also for prehospital (H)EMS applications. Since (H)EMS operations are time-critical, we studied the Infrascanner 2000 as a “first-time-right” monitor in healthy volunteers (n=17, hospital employees, no neurologic history). Further, we studied the implementation of the Infrascanner 2000 in a European HEMS organization (Lifeliner 1, Amsterdam, The Netherlands). The principal results of our study were as follows: The screening for intracranial hematomas in healthy volunteers with first-time-right intention resulted in a marked rate of virtual hematomas (false positive results, i.e., 12/17), rendering more time consuming repeat measurements advisable. The results of the implementation of the Infrascanner in HEMS suggest that NIRS-based intracranial hematoma detection is feasible in the HEMS setting. However, some drawbacks exist and their possible solutions are discussed. Future studies will have to demonstrate how NIRS-based intracranial hematoma detection will improve prehospital decision making in (H)EMS and ultimately patient outcome.

Accuracy of a Cerebral Oximeter in Healthy Volunteers under Conditions of Isocapnic Hypoxia 

1998 ◽  
Vol 88 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Lindsey C. Henson ◽  
Carolyn Calalang ◽  
John A. Temp ◽  
Denham S. Ward
Keyword(s):  
Infrared Spectroscopy ◽  
Oxygen Saturation ◽  
Healthy Volunteers ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Cerebral Oxygenation ◽  
Jugular Bulb ◽  
Wide Range ◽  
Cerebral Oximeter ◽  
End Tidal

Background A cerebral oximeter measures oxygen saturation of brain tissue noninvasively by near infrared spectroscopy. The accuracy of a commercially available oximeter was tested in healthy volunteers by precisely controlling end-tidal oxygen (P[ET]O2) and carbon dioxide (P[ET]CO2) tensions to alter global cerebral oxygen saturation. Methods In 30 healthy volunteers, dynamic end-tidal forcing was used to produce step changes in P[ET]O2 resulting in arterial saturation ranging from approximately 70% to 100% under conditions of controlled normocapnia (each person's resting P[ET]CO2) or hypercapnia (resting plus 7-10 mmHg). Blood arterial (SaO2) and jugular bulb venous (S[jv]O2) saturations during each P(ET)O2 interval were determined by co-oximetry. The cerebral oximeter reading (rSO2) and an estimated jugular venous saturation (S[jv]O2), derived from a combination of SaO2 and rSO2, were compared with the measured S(jv)O2. Results The S(jv)O2 was significantly higher with hypercapnia than with normocapnia for the same SaO2. The rSO2 and S(jv)O2 were both highly correlated with S(jv)O2 for individual volunteers (mean r2 = 0.91 for each relation); however, the slopes and intercepts varied widely among volunteers. In three of them, the cerebral oximeter substantially underestimated the measured S(jv)O2. Conclusions During isocapnic hypoxia in healthy persons, cerebral oxygenation as estimated by near infrared spectroscopy precisely tracks changes in measured S(jv)O2 within individuals, but the relation exhibits a wide range of slopes and intercepts. Therefore the clinical utility of the device is limited to situations in which tracking trends in cerebral oxygenation would be acceptable.

scholarly journals Recognition of osmotolerant yeast spoilage in kiwi juices by near-infrared spectroscopy coupled with chemometrics and wavelength selection

RSC Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 222-229 ◽  
Author(s):  
Chen Niu ◽  
Yahong Yuan ◽  
Hong Guo ◽  
Xin Wang ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Wavelength Selection ◽  
Svm Model ◽  
First Time ◽  
Osmotolerant Yeast

The study developed a NIR-SVM model for accurate recognition of osmotolerant yeasts in kiwi juice for the first time.

scholarly journals Diagnostic properties of a portable near-infrared spectroscopy to detect intracranial hematoma in traumatic brain injury patients

2020 ◽  
Vol 7 ◽  
pp. 100246
Author(s):  
Chaiyaporn Yuksen ◽  
Pungkawa Sricharoen ◽  
Nipa Puengsamran ◽  
Nitima Saksobhavivat ◽  
Yuwares Sittichanbuncha ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Infrared Spectroscopy ◽  
Brain Injury ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Intracranial Hematoma ◽  
Diagnostic Properties

scholarly journals Twisted Jets from L1551 IRS5

2001 ◽  
Vol 200 ◽  
pp. 261-264
Author(s):  
Yoichi Itoh
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Spatial Variation ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Close Vicinity ◽  
Jet Structure ◽  
First Time ◽  
Bright Emission

We have carried out high-resolution near-infrared imaging observations of a protostar L1551 IRS 5 with the Subaru Telescope. The jet structure of IRS5 is resolved into two independent jets for the first time from the ground. Successive near-infrared spectroscopy has revealed that the jet emission is dominated by [Fe II] lines in the J and H-bands. While the visual-extinction reaches more than 20 mag in the close vicinity of IRS 5, it decreases rapidly at ∼1″ from IRS 5 and remains constant around 7 mag at larger distances. The twisted structure and bright emission knots are intrinsic to the jets, not due to a spatial variation of the extinction.

Detection of intracranial hematomas in the emergency department using near infrared spectroscopy

Brain Injury ◽  
2019 ◽  
Vol 33 (7) ◽  
pp. 875-883 ◽  
Author(s):  
Vassilios Kontojannis ◽  
Isabel Hostettler ◽  
Robert James Brogan ◽  
Muhammad Raza ◽  
Abby Harper-Payne ◽  
...  
Keyword(s):  
Emergency Department ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Intracranial Hematomas

Early detection of delayed traumatic intracranial hematomas using near-infrared spectroscopy

1995 ◽  
Vol 83 (3) ◽  
pp. 438-444 ◽  
Author(s):  
Shankar P. Gopinath ◽  
Claudia S. Robertson ◽  
Charles F. Contant ◽  
Raj K. Narayan ◽  
Robert G. Grossman ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Ct Scan ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Mass Effect ◽  
Intracerebral Hematoma ◽  
Secondary Brain Injury ◽  
Content Type ◽  
Postoperative Hematoma ◽  
Intracranial Hematomas

✓ Delayed intracranial hematomas are an important treatable cause of secondary brain injury in patients with head trauma. Early identification and treatment of these lesions, which appear or enlarge after the initial computerized tomography (CT) scan, may improve neurological outcome. Serial examinations using near-infrared spectroscopy (NIRS) to detect the development of delayed hematomas were performed in 167 patients. The difference in absorbance of light (ΔOD) at 760 nm between the normal and the hematoma side was measured serially during the first 3 days after injury. Twenty-seven (16%) of the patients developed a type of late hematoma: intracerebral hematoma in eight, extracerebral hematoma in six, and postoperative hematoma in 13 patients. Eighteen of the delayed hematomas caused significant mass effect and required surgical evacuation. The hematomas appeared between 2 and 72 hours after admission. In 24 of the 27 patients, a significant increase (> 0.3) in the ΔOD occurred prior to an increase in intracranial pressure, a change in the neurological examination, or a change on CT scan. A favorable outcome occurred in 67% of the patients with delayed hematomas, which suggests that early diagnosis using NIRS may allow early treatment and reduce secondary injury caused by delayed hematomas.

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