The endothelial injury threshold was determined in rabbit for an 11-s exposure to 1.54 micro m radiation from an Erbium fiber laser. The beam was Gaussian with a 1/e diameter of 7 mm. Cell damage was detected with a wet staining technique. The threshold dose for these conditions is 4.4 x 10(5) J m(-2) (44 J cm) and is only 9% greater than the threshold for epithelial damage for the same exposure conditions. Exposures just above the threshold caused substantial endothelial damage, including loss of cells. The calculated endothelial temperature increase at the threshold is similar to that calculated for the epithelium at its injury threshold for the same exposure conditions. The results suggest that endothelial damage can be correlated with a critical temperature damage model with a critical temperature increase near 40 degrees C. The results also suggest that if a person were to receive an exposure only slightly above the epithelial injury threshold from a beam having a diameter of 7 mm (which is the diameter of the exit pupil of 7 x 50 binoculars) he or she would risk sustaining substantial endothelial damage.
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http://dx.doi.org/10.1097/01.HP.0000248146.90949.0d | DOI Listing |
Phytomedicine
January 2025
Department of Pharmacy, Xijing Hospital, Fourth Military Medical University, Changle West Street 15, Xi'an, Shaanxi, 710032, China. Electronic address:
Background: The pathogenesis of neuropathic pain is complex and lacks effective clinical treatment strategies. Medical plants and herbal extracts from traditional Chinese medicine with multi-target comprehensive effects have attracted great attention from scientists.
Purpose: To investigate the pharmacological active components and mechanism underlying the anti-neuralgia effect of classic analgesic formulas Duhuo Jisheng Mixture (DJM).
Sensors (Basel)
January 2025
Department of Biomedical Engineering, Price Faculty of Engineering, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
Goal: Current methodologies for assessing cerebral compliance using pressure sensor technologies are prone to errors and issues with inter- and intra-observer consistency. RAP, a metric for measuring intracranial compensatory reserve (and therefore compliance), holds promise. It is derived using the moving correlation between intracranial pressure (ICP) and the pulse amplitude of ICP (AMP).
View Article and Find Full Text PDFMedicina (Kaunas)
January 2025
Department of Trauma Surgery, Jeju Regional Trauma Center, Cheju Halla General Hospital, Jeju 63127, Republic of Korea.
: Two major classification systems exist for rib fracture (RFX) displacement. One system uses a 50% displacement threshold: Grade I (<50%), Grade II (≥50% to <100%), and Grade III (completely dislocated). Another proposes a 10% threshold: Undisplaced (<10%), Offset (≥10% to <100%), and Displaced (completely dislocated).
View Article and Find Full Text PDFInj Epidemiol
January 2025
Department of Emergency Medicine, Emory University, 531 Asbury Circle, Annex Building Suite N340, Atlanta, GA, 30322, USA.
Background: Cycling promotes health but carries significant injury risks, especially for older adults. In the U.S.
View Article and Find Full Text PDFEur J Trauma Emerg Surg
January 2025
Liverpool Orthopaedic and Trauma Service, Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom.
Background: Midfoot fractures in polytrauma patients are often an underappreciated injury relative to their other major injuries sustained. In this study, our aim was to explore the mechanisms and patterns of injury in polytrauma related midfoot fractures as compared to single limb injuries.
Setting: Multicentre observational study.
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