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Sidestream dark field imaging

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https://www.readbyqxmd.com/read/28977264/recent-advances-in-bedside-microcirculation-assessment-in-critically-ill-patients
#1
Philipe Franco do Amaral Tafner, Felipe Ko Chen, Roberto Rabello, Thiago Domingos Corrêa, Renato Carneiro de Freitas Chaves, Ary Serpa
Parameters related to macrocirculation, such as the mean arterial pressure, central venous pressure, cardiac output, mixed venous saturation and central oxygen saturation, are commonly used in the hemodynamic assessment of critically ill patients. However, several studies have shown that there is a dissociation between these parameters and the state of microcirculation in this group of patients. Techniques that allow direct viewing of the microcirculation are not completely disseminated, nor are they incorporated into the clinical management of patients in shock...
April 2017: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/28822141/applicability-of-quantitative-optical-imaging-techniques-for-intraoperative-perfusion-diagnostics-a-comparison-of-laser-speckle-contrast-imaging-sidestream-dark-field-microscopy-and-optical-coherence-tomography
#2
Sanne M Jansen, Daniel M de Bruin, Dirk J Faber, Iwan J G G Dobbe, Erik Heeg, Dan M J Milstein, Simon D Strackee, Ton G van Leeuwen
Patient morbidity and mortality due to hemodynamic complications are a major problem in surgery. Optical techniques can image blood flow in real-time and high-resolution, thereby enabling perfusion monitoring intraoperatively. We tested the feasibility and validity of laser speckle contrast imaging (LSCI), optical coherence tomography (OCT), and sidestream dark-field microscopy (SDF) for perfusion diagnostics in a phantom model using whole blood. Microvessels with diameters of 50, 100, and 400  μm were constructed in a scattering phantom...
August 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28812428/microvascular-perfusion-in-cardiac-arrest-a-review-of-microcirculatory-imaging-studies
#3
Petra Krupičková, Zuzana Mormanová, Tomáš Bouček, Tomáš Belza, Jana Šmalcová, Jan Bělohlávek
Cardiac arrest represents a leading cause of mortality and morbidity in developed countries. Extracorporeal cardiopulmonary resuscitation (ECPR) increases the chances for a beneficial outcome in victims of refractory cardiac arrest. However, ECPR and post-cardiac arrest care are affected by high mortality rates due to multi-organ failure syndrome, which is closely related to microcirculatory disorders. Therefore, microcirculation represents a key target for therapeutic interventions in post-cardiac arrest patients...
August 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28683162/an-observational-study-of-microcirculation-in-dialysis-patients-and-kidney-transplant-recipients
#4
Yu Chang Yeh, Anne Chao, Chih-Yuan Lee, Chen-Tse Lee, Chi-Chuan Yeh, Chih-Min Liu, Meng-Kun Tsai
BACKGROUND: Microcirculatory dysfunction contributes to acute and chronic kidney diseases. To the best of our knowledge, no study has compared differences in microcirculation among healthy volunteers, dialysis patients and kidney transplant recipients. MATERIALS AND METHODS: Sublingual microcirculation was examined using sidestream dark field imaging and was compared among 90 healthy volunteers, 40 dialysis patients and 40 kidney transplant recipients. The gender effect on microcirculation and the correlations among the microcirculation parameters, age, body mass index, heart rate and blood pressure were analysed...
July 6, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28420463/-changes-of-small-intestinal-villi-microcirculation-in-sidestream-dark-field-imaging-with-different-target-blood-pressure-in-rabbits-during-endotoxin-shock
#5
Fei Gao, Xiaoyun Fu, Mingjiang Qian, Yu Zhang, Guangsu Li, Jie Hu
OBJECTIVE: Changes of small intestine villus microcirculation perfusion in sidestream dark-field (SDF) imaging in the rabbits during endotoxic shock after fluid resuscitation with different target mean arterial pressure (MAP), and evaluation of feasibility of monitoring small intestine villus microcirculation by SDF were studied. METHODS: Sixty standard New Zealand white rabbits were randomly divided into two groups: low target MAP group (group A, n = 30) and high target MAP group (group B, n = 30)...
April 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28338505/effects-of-hypertonic-saline-and-sodium-lactate-on-cortical-cerebral-microcirculation-and-brain-tissue-oxygenation
#6
Vlasta Dostalova, Jitka Schreiberova, Vlasta Dostalova, Jiri Paral, Jaroslav Kraus, Alena Ticha, Vera Radochova, Pavel Dostal
BACKGROUND: Hyperosmolar solutions have been used in neurosurgery to modify brain bulk. The aim of this animal study was to compare the short-term effects of equivolemic, equiosmolar solutions of hypertonic saline (HTS) and sodium lactate (HTL) on cerebral cortical microcirculation and brain tissue oxygenation in a rabbit craniotomy model. METHODS: Rabbits (weight, 1.5 to 2.0 kg) were anesthetized, ventilated mechanically, and subjected to a craniotomy. The animals were allocated randomly to receive a 3...
March 23, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28298202/evaluation-of-sublingual-microcirculation-in-a-paediatric-intensive-care-unit-prospective-observational-study-about-its-feasibility-and-utility
#7
Rafael González, Jorge López, Javier Urbano, María José Solana, Sarah Nicole Fernández, María José Santiago, Jesús López-Herce
BACKGROUND: Evaluation of the microcirculation in critically ill patients is usually done by means of indirect parameters. The aim of our study was to evaluate the functional state of the microcirculation by direct visualization of sublingual microcirculation using Sidestream Dark Field Imaging, to determine the correlation between these findings and other parameters that are commonly used in the clinical practice and to assess the applicability of the systematic use of this technique in critically ill children...
March 15, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28219329/ultrafiltration-rate-is-an-important-determinant-of-microcirculatory-alterations-during-chronic-renal-replacement-therapy
#8
Gerke Veenstra, Andrius Pranskunas, Inga Skarupskiene, Vidas Pilvinis, Marc H Hemmelder, Can Ince, E Christiaan Boerma
BACKGROUND: Hemodialysis (HD) with ultrafiltration (UF) in chronic renal replacement therapy is associated with hemodynamic instability, morbidity and mortality. Sublingual Sidestream Dark Field (SDF) imaging during HD revealed reductions in microcirculatory blood flow (MFI). This study aims to determine underlying mechanisms. METHODS: The study was performed in the Medical Centre Leeuwarden and the Lithuanian University of Health Sciences. Patients underwent 4-h HD session with linear UF...
February 20, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28073175/postreperfusion-microcirculatory-derangements-after-liver-transplantation-relationship-to-hemodynamics-serum-mediators-and-outcome
#9
Carlo Pulitano, David Joseph, Charbel Sandroussi, Deborah Verran, Phong Ho, Ashe Debiasio, Adriano Luongo, Geoffrey W McCaughan, Nicholas A Shackel, Michael Crawford
Despite the growing data supporting the role of microcirculation in regulating liver function, little of this knowledge has been translated into clinical practice. The aim of this study is to quantify hepatic microcirculation in vivo using sidestream dark field (SDF) imaging and correlate these findings with hepatic blood flow, hemodynamic parameters, and soluble mediators. Postreperfusion hepatic microcirculation was assessed using SDF imaging. Hepatic microcirculation measurements included functional sinusoidal density (cm/cm(2) ), sinusoidal diameter (μm), red blood cell velocity (μm/second), volumetric blood flow (pl/second), and flow heterogeneity (FH) index...
April 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28057660/protocol-for-intraoperative-assessment-of-the-human-cerebrovascular-glycocalyx
#10
R H L Haeren, H Vink, J Staals, M A M J van Zandvoort, J Dings, J J van Overbeeke, G Hoogland, K Rijkers, O E M G Schijns
INTRODUCTION: Adequate functioning of the blood-brain barrier (BBB) is important for brain homoeostasis and normal neuronal function. Disruption of the BBB has been described in several neurological diseases. Recent reports suggest that an increased permeability of the BBB also contributes to increased seizure susceptibility in patients with epilepsy. The endothelial glycocalyx is coating the luminal side of the endothelium and can be considered as the first barrier of the BBB. We hypothesise that an altered glycocalyx thickness plays a role in the aetiology of temporal lobe epilepsy (TLE), the most common type of epilepsy...
January 5, 2017: BMJ Open
https://www.readbyqxmd.com/read/27984315/effect-of-pulsatility-on-microcirculation-in-patients-treated-with-extracorporeal-cardiopulmonary-resuscitation-a-pilot-study
#11
Petra Krupičková, Michal Huptych, Zuzana Mormanová, Tomáš Bouček, Tomáš Belza, Ondřej Šmíd, Aleš Král, Hana Skalická, Aleš Linhart, Jan Bělohlávek
The effect of pulsatile blood flow on microcirculation during extracorporeal cardiopulmonary resuscitation (ECPR) is not elucidated; therefore, we designed an observational study comparing sublingual microcirculation in patients with refractory cardiac arrest (CA) with spontaneously pulsatile or low/nonpulsatile blood flow after treatment with ECPR. Microcirculation was assessed with Sidestream Dark Field technology in 12 patients with CA who were treated with ECPR and 12 healthy control subjects. Microcirculatory images were analyzed offline in a blinded fashion, and consensual parameters were determined for the vessels ≤20 μm...
July 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/27931654/the-response-of-the-microcirculation-to-mechanical-support-of-the-heart-in-critical-illness
#12
REVIEW
Sakir Akin, Atila Kara, Corstiaan A den Uil, Can Ince
Critical illness associated with cardiac pump failure results in reduced tissue perfusion in all organs and occurs in various conditions such as sepsis, cardiogenic shock, and heart failure. Mechanical circulatory support (MCS) devices can be used to maintain organ perfusion in patients with cardiogenic shock and decompensated chronic heart failure. However, correction of global hemodynamic parameters by MCS does not always cause a parallel improvement in microcirculatory perfusion and oxygenation of the organ systems, a condition referred to as a loss of hemodynamic coherence between macro- and microcirculation (MC)...
December 2016: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/27698325/use-of-an-image-acquisition-stabilizer-improves-sidestream-dark-field-imaging-of-the-serosa-during-open-gastrointestinal-surgery
#13
COMPARATIVE STUDY
Anthonius F J de Bruin, Arthur Tavy, Koene van der Sloot, Anke Smits, Bert Van Ramshorst, Christiaan E Boerma, Peter Kars, Peter G Noordzij, Djamila Boerma, Mat van Iterson
AIM: To investigate whether an image acquisition stabilizer (IAS) mounted on the sidestream dark field camera (SDF) during gastrointestinal surgery improves image stability and acquisition. METHODS: Serosal SDF imaging was compared with SDF imaging combined with an IAS (SDF + IAS) during gastrointestinal surgery. Stability was assessed as the image drift in pixels and the time to obtain stable images. The success rate was determined as the percentage of analyzable images after recording...
2016: Journal of Vascular Research
https://www.readbyqxmd.com/read/27635767/effect-of-rbc-transfusion-on-sublingual-microcirculation-in-hemorrhagic-shock-patients-a-pilot-study
#14
Sebastien Tanaka, Etienne Escudier, Sophie Hamada, Anatole Harrois, Pierre Etienne Leblanc, Eric Vicaut, Jacques Duranteau
OBJECTIVES: The effects of RBC transfusion on microvascular perfusion are not well documented. We investigated the effect of RBC transfusion on sublingual microcirculation in hemorrhagic shock patients. DESIGN: Prospective, preliminary observational study. SETTINGS: A 28-bed, surgical ICU in a university hospital. PATIENTS: Fifteen hemorrhagic shock patients requiring RBC transfusion. INTERVENTION: Transfusion of one unit of RBCs...
February 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/27590460/dexmedetomidine-versus-propofol-sedation-improves-sublingual-microcirculation-after-cardiac-surgery-a-randomized-controlled-trial
#15
RANDOMIZED CONTROLLED TRIAL
Xu Liu, Kai Zhang, Wei Wang, Guohao Xie, Baoli Cheng, Yan Wang, Yaoqin Hu, Xiangming Fang
OBJECTIVES: To compare the effects of dexmedetomidine and propofol on sublingual microcirculation in patients after cardiac surgery. DESIGN: A prospective, randomized, single-blind study. SETTING: University hospital. PARTICIPANTS: Adult patients undergoing elective valve surgery with cardiopulmonary bypass. INTERVENTIONS: On arrival in the intensive care unit (ICU), patients were assigned randomly to receive either dexmedetomidine (0...
December 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27539312/impact-of-microcirculatory-video-quality-on-the-evaluation-of-sublingual-microcirculation-in-critically-ill-patients
#16
Elisa Damiani, Can Ince, Claudia Scorcella, Roberta Domizi, Andrea Carsetti, Nicoletta Mininno, Silvia Pierantozzi, Erica Adrario, Rocco Romano, Paolo Pelaia, Abele Donati
We aimed to assess the impact of image quality on microcirculatory evaluation with sidestream dark-field (SDF) videomicroscopy in critically ill patients and explore factors associated with low video quality. This was a retrospective analysis of a single-centre prospective observational study. Videos of the sublingual microcirculation were recorded using SDF videomicroscopy in 100 adult patients within 12 h from admittance to the intensive care unit and every 24 h until discharge/death. Parameters of vessel density and perfusion were calculated offline for small vessels...
August 18, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27480483/accessing-the-biocompatibility-of-layered-double-hydroxide-by-intramuscular-implantation-histological-and-microcirculation-evaluation
#17
Vanessa Roberta Rodrigues Cunha, Rodrigo Barbosa de Souza, Ana Maria Cristina Rebello Pinto da Fonseca Martins, Ivan Hong Jun Koh, Vera Regina Leopoldo Constantino
Biocompatibility of layered double hydroxides (LDHs), also known as hydrotalcite-like materials or double metal hydroxides, was investigated by in vivo assays via intramuscular tablets implantation in rat abdominal wall. The tablets were composed by chloride ions intercalated into LDH of magnesium/aluminum (Mg2Al-Cl) and zinc/aluminum (Zn2Al-Cl). The antigenicity and tissue integration capacity of LDHs were assessed histologically after 7 and 28 days post-implantation. No fibrous capsule nearby the LDH was noticed for both materials as well any sign of inflammatory reactions...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27401581/conjunctival-microcirculatory-blood-flow-is-altered-but-not-abolished-in-brain-dead-patients-a-prospective-observational-study
#18
Tomas Tamosuitis, Andrius Pranskunas, Neringa Balciuniene, Vidas Pilvinis, E Christiaan Boerma
BACKGROUND: The conjunctival microcirculation has potential as a window to cerebral perfusion due to related blood supply, close anatomical proximity and easy accessibility for microcirculatory imaging technique, such as sidestream dark field (SDF) imaging. Our study aims to evaluate conjunctival and sublingual microcirculation in brain dead patients and to compare it with healthy volunteers in two diametrically opposed conditions: full stop versus normal arterial blood supply to the brain...
July 11, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27277706/microcirculatory-blood-flow-during-cardiac-arrest-and-cardiopulmonary-resuscitation-does-not-correlate-with-global-hemodynamics-an-experimental-study
#19
Petra Krupičková, Mikuláš Mlček, Michal Huptych, Zuzana Mormanová, Tomáš Bouček, Tomáš Belza, Stanislav Lacko, Miloš Černý, Petr Neužil, Otomar Kittnar, Aleš Linhart, Jan Bělohlávek
BACKGROUND: Current research highlights the role of microcirculatory disorders in post-cardiac arrest patients. Affected microcirculation shows not only dissociation from systemic hemodynamics but also strong connection to outcome of these patients. However, only few studies evaluated microcirculation directly during cardiac arrest (CA) and cardiopulmonary resuscitation (CPR). The aim of our experimental study in a porcine model was to describe sublingual microcirculatory changes during CA and CPR using recent videomicroscopic technology and provide a comparison to parameters of global hemodynamics...
June 8, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27230099/association-of-microvascular-function-and-endothelial-biomarkers-with-clinical-outcome-in-dengue-an-observational-study
#20
Sophie Yacoub, Phung Khanh Lam, Le Hoang Mai Vu, Thi Lien Le, Ngo Thanh Ha, Tran Thi Toan, Nguyen Thu Van, Nguyen Than Ha Quyen, Huynh Thi Le Duyen, Nguyen Van Kinh, Annette Fox, Juthathip Mongkolspaya, Marcel Wolbers, Cameron Paul Simmons, Gavin Robert Screaton, Heiman Wertheim, Bridget Wills
BACKGROUND: The hallmark of severe dengue is increased microvascular permeability, but alterations in the microcirculation and their evolution over the course of dengue are unknown. METHODS: We conducted a prospective observational study to evaluate the sublingual microcirculation using side-stream dark-field imaging in patients presenting early (<72 hours after fever onset) and patients hospitalized with warning signs or severe dengue in Vietnam. Clinical findings, microvascular function, global hemodynamics assessed with echocardiography, and serological markers of endothelial activation were determined at 4 time points...
September 1, 2016: Journal of Infectious Diseases
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