The tissue viability imaging system—Suitable method for discovering minimal skin changes in occupational screenings? Results of a cross‐sectional field study

2019 ◽  
Vol 25 (4) ◽  
pp. 553-563 ◽  
Author(s):  
Wobbeke Weistenhöfer ◽  
Wolfgang Uter ◽  
Franziska Bernet ◽  
Hans Drexler
Keyword(s):  
Field Study ◽  
Imaging System ◽  
Suitable Method ◽  
Tissue Viability ◽  
Cross Sectional ◽  
Skin Changes ◽  
Viability Imaging

scholarly journals Analytical Performance of the Exacto Test HIV Self-Test: A Cross-Sectional Field Study in the Democratic Republic of the Congo

2020 ◽  
Vol 7 (12) ◽  
Author(s):  
Serge Tonen-Wolyec ◽  
Jérémie Muwonga Masidi ◽  
Luc Ferdinand Kamanga Lukusa ◽  
Gaetan Nsiku Dikumbwa ◽  
Angèle Sarassoro ◽  
...  
Keyword(s):  
Field Study ◽  
Democratic Republic ◽  
Analytical Performance ◽  
Viable Option ◽  
Excellent Performance ◽  
Cross Sectional ◽  
Performance Sensitivity ◽  
Self Testing ◽  
Republic Of The Congo ◽  
Self Test

Abstract The Democratic Republic of the Congo (DRC) has begun implementing HIV self-testing to boost the first “95” of the UNAIDS 95-95-95 targets by 2025. This study aims to assess the performance and usability of the Exacto Test HIV (Biosynex, Strasbourg, France) self-test in the lab and in the field. The Exacto Test HIV self-test demonstrated high virological performance (sensitivity, 99.6%; specificity, 100%) in the lab and in the field in the hand of untrained users (sensitivity, 100%; specificity, 98.9%). Taken together, the excellent performance and usability characteristics of the Exacto Test HIV (Biosynex) self-test make the kit a viable option for HIV self-testing in the DRC.

Abstract P222: Venous Dilation Contributes to 5-HT-induced Hypotension

Hypertension ◽  
2015 ◽  
Vol 66 (suppl_1) ◽  
Author(s):  
Bridget M Seitz ◽  
Teresa Krieger-Burke ◽  
Stephanie W Watts
Keyword(s):  
Blood Pressure ◽  
Imaging System ◽  
Isometric Force ◽  
Peripheral Resistance ◽  
Vena Cava ◽  
Mesenteric Arteries ◽  
Conscious Rat ◽  
Cross Sectional ◽  
Induced Hypotension ◽  
Vascular Bed

Serotonin (5-hydroxytryptamine, 5-HT) infusion in a normal conscious rat decreases mean arterial pressure (MAP), in part by reduction in total peripheral resistance. Microsphere experiments have shown 5-HT increases blood flow within the splanchnic vascular bed, with the greatest being in the intestine and spleen. Interestingly, 5-HT does not cause a direct relaxation of resistant (small or large) mesenteric arteries. The present study addresses the possibility of the venous circulation contributing to the 5-HT induced fall in blood pressure. Our working hypothesis is venous dilation, specifically dilation of veins measurable within the splanchnic vascular bed, contributes to 5-HT-induced hypotension. Using an ultrasound imaging system (Vevo 2100 imaging system; 21 MHz probe,Visual Sonics Inc.), telemetry-implanted, anesthetized male Sprague Dawley rats underwent cross-sectional imaging which was controlled for respiration and cardiac cycles. The following vessels were imaged: abdominal aorta (AA); portal vein (PV); abdominal inferior vena cava (IVC); and superior mesenteric vein (SMV). Following the collection of baseline MAP and vessel diameter measurements, Alzet osmotic mini-pumps containing vehicle (saline; n=9) or 5-HT (25 ug/kg/min; n=9) were implanted for 1 week. After, 24 hours of infusion, 5-HT increased the vein diameter (SMV 17.48±2%; PV 17.67±2%; IVC 46.87±8%) and maintained the AA diameter ( AA 0.93±1%) from baseline while reducing MAP (vehicle 101.93±3; 5-HT 84.68±2 mm Hg; p<0.05).One-week post removal of all osmotic mini-pumps, there was no difference in the MAP or diameter of all noted vessels between the two treatment groups. To correlate with in vivo findings, the PV and IVC, when isolated in a tissue bath for measurement of isometric force and contracted with endothelin 1, relaxed in a concentration dependent fashion to 5-HT and 5-carboxamidotryptamine (5-HT 1/7 receptor agonist;1 nM-10 uM). Collectively, these findings highlight the contribution of splanchnic venous dilation in 5-HT-induced hypotension and propose a possible mechanism for 5-HT reduction in blood pressure.

Comparison of tissue viability imaging and colorimetry: skin blanching

2009 ◽  
Vol 15 (1) ◽  
pp. 20-23 ◽  
Author(s):  
Hongbo Zhai ◽  
Heidi P. Chan ◽  
Sara Farahmand ◽  
Gert E. Nilsson ◽  
Howard I. Maibach
Keyword(s):  
Tissue Viability ◽  
Viability Imaging

Neonatal eye screening for 203 healthy term newborns using a wide-field digital retinal imaging system

2019 ◽  
Author(s):  
Kenneth Teow Kheng Leong ◽  
Siti Nur Amira Abu Kassim ◽  
Jasvinjeet Kaur Sidhu ◽  
Zayani Zohari ◽  
Thivakar Sivalingam ◽  
...  
Keyword(s):  
Imaging System ◽  
Retinal Imaging ◽  
Common Finding ◽  
Wide Field ◽  
Retinal Haemorrhage ◽  
Cross Sectional ◽  
Ocular Abnormalities ◽  
Eye Screening ◽  
Term Newborns ◽  
Retinal Haemorrhages

Abstract Purpose This study aimed to determine the proportion and types of ocular abnormalities detected in healthy term newborns and also the risk factors associated with retinal haemorrhages. Method This cross-sectional study comprised of 203 participants, all healthy term newborn infants in the Obstetrics and Gynaecology ward at Hospital Kuala Lumpur over a six months period. The examination list includes external eye examination, red reflex test, and fundus imaging using a wide-field digital retinal imaging system (Phoenix Clinical ICON Paediatric Retinal Camera) by a trained Investigator. The pathologies detected were documented. The results were compared with similar studies previously published in the literature. Results Total ocular abnormalities were detected in 34% infants. The most common finding was retinal haemorrhage in 29.6% infants, of which 53.3% occurred bilaterally. Spontaneous vaginal delivery (SVD) remained the greatest risk factor which has nearly four times higher risk of newborns developing retinal haemorrhage compared to Lower Segment Caesarean Section (LSCS). There was a 6% increased likelihood of developing retinal haemorrhage for every 1 minute increment in the duration of 2nd stage of labour. Newborns delivered via SVD with episiotomy had 2.5 higher odds of developing retinal haemorrhage in newborns compared to SVD without episiotomy. Conclusion Universal eye screening for all newborns using a wide-field digital imaging system is possible, safe and useful in detecting posterior segment disorders. The most common abnormality detected is retinal haemorrhage. Although most resolve spontaneously, a longitudinal study is needed to study the long term effect of retinal haemorrhages in these infants.

Tissue Viability Imaging

2012 ◽  
pp. 165-195
Author(s):  
Jim O'Doherty ◽  
Martin J. Leahy ◽  
Gert E. Nilsson
Keyword(s):  
Tissue Viability ◽  
Viability Imaging

scholarly journals Digital Holographic Multimodal Cross-Sectional Fluorescence and Quantitative Phase Imaging System

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Manoj Kumar ◽  
Xiangyu Quan ◽  
Yasuhiro Awatsuji ◽  
Yosuke Tamada ◽  
Osamu Matoba
Keyword(s):  
Imaging System ◽  
Phase Imaging ◽  
Quantitative Phase Imaging ◽  
Cross Sectional ◽  
Quantitative Phase

An Improved Medical Ultrasonic Imaging System for Scanning Peripheral Anatomy

1981 ◽  
Vol 3 (4) ◽  
pp. 309-322 ◽  
Author(s):  
K. W. Marich ◽  
S. D. Ramsey ◽  
D. A. Wilson ◽  
J. F. Holzemer ◽  
D. J. Burch ◽  
...  
Keyword(s):  
Blood Flow ◽  
Imaging System ◽  
Arterial Disease ◽  
Cross Sectional ◽  
Anatomic Structure ◽  
Doppler System ◽  
Diagnostic Potential ◽  
Simultaneous Evaluation ◽  
Blood Flow Dynamics ◽  
Very High

An Improved Ultrasonic B-scan/Doppler system has been developed for the noninvasive assessment of atherosclerotic arterial disease. Very high-resolution cross-sectional images of anatomic structures are produced by the 10-MHz B-scan subsystem. Instantaneous profiles of blood flow velocity as a function of position are produced by a bidirectional 16-channel pulsed-Doppler subsystem, operating at 5 MHz. Flow profiles are superimposed on the B-scan image, allowing simultaneous evaluation of anatomic structure and blood flow dynamics. Images of the carotid artery, thyroid gland, testicle, and eye are presented to demonstrate the diagnostic potential for imaging peripheral anatomy.

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