scholarly journals Analysis of microcirculatory disorders in men with more than 10 years’ experience on night work

2021 ◽  
Vol 102 (4) ◽  
pp. 474-478
Author(s):  
I A Gribanov ◽  
E G Zarubina
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Saturation ◽  
Healthy Volunteers ◽  
Work Experience ◽  
Oxygen Exchange ◽  
Night Work ◽  
Control Group ◽  
Doppler Flowmetry ◽  
Arterial Blood

Aim. To study the nature and extent of the effects of long-term sleep and wake phase disorders (working at night for more than 10 years) on the characteristics of microcirculation in men. Methods. Laser Doppler flowmetry and spectophotometry, optical tissue oximetry, and laser-induced fluorescence spectroscopy were performed in 34 male patients with a mean age of 40.30.9 years and more than 10 years experience of night work to assess the effectiveness of microcirculation. 25 men with a mean age of 40.21.2 without night work experience were used as a control group. Microcirculation was studied on the laser diagnostic complex LAKK-M (LAZMA, Russian Federation). The measurement was carried out on the skin of the palmar surface of the terminal phalanx of the second finger of the hand. The following indicators were analyzed in automatic mode: the mean perfusion value, the index of specific oxygen consumption in the tissue, capillary blood saturation, the relative volume of the red blood cell fraction, arterial blood oxygen saturation, the index of perfusion oxygen saturation in the microcirculation, the efficiency of oxygen exchange and the fluorescent indicator of oxygen consumption. Statistical processing of the results was carried out using the Student's t-test for independent samples. Results. In patients working at night for more than 10 years, a decrease in microcirculation efficiency was revealed. The index of specific oxygen consumption in the tissue was lower than that of healthy volunteers by 34.1% (p=0.000255), and the index of oxygen exchange efficiency by 56.3% (p 0.001). Long-term night work (10 years) can lead to violations of microcirculation parameters and an irreversible decrease in the efficiency of oxygen exchange compared with the control group by an average of 56.3% (18.00.5 for the group with night work experience, 41.20.6 for the group of healthy volunteers, p 0.001), the index of specific oxygen consumption in the tissue by an average of 34.1% (1.530.03 for the group with night work experience, 2.320.2 for the group of healthy volunteers, p=0.000255) and an increase in the index of perfusion oxygen saturation in the microcirculation by 2 times compared with the control group (6.20.05 for the group with night work experience, 3.670.09 for the group of healthy volunteers, p 0.001), which is accompanied by an increase in the saturation of mixed (and venous) blood. Conclusion. The nature of the revealed violations of microcirculatory parameters in the long-term night work suggests their significance in the development of diseases that are currently attributable to the so-called group of diseases of civilization.

The response of skin perfusion and of rheological and immunological variables to intravenous prostanoid administration in Raynaud’s phenomenon secondary to collagenosis

VASA ◽  
2005 ◽  
Vol 34 (4) ◽  
pp. 243-249 ◽  
Author(s):  
Drinda ◽  
Neumann ◽  
Pöhlmann ◽  
Vogelsang ◽  
Stein ◽  
...  
Keyword(s):  
Laser Doppler Flowmetry ◽  
Raynaud’S Phenomenon ◽  
Raynaud's Phenomenon ◽  
Plasma Viscosity ◽  
Laser Doppler ◽  
Erythrocyte Aggregation ◽  
Control Group ◽  
Long Term Effects ◽  
Doppler Flowmetry

Background: Prostanoids are used in the treatment of Raynaud’s phenomenon and acral perfusion disorders secondary to collagenosis. In subjective terms, intravenous administration of these agents produces success in more than 50% of patients. The therapeutic outcome of clinical administration of alprostadil or iloprost may vary from individual to individual. Patients and methods: The following variables were analysed in a cross-over study in 27 patients with collagenosis and Raynaud’s phenomenon: plasma viscosity and erythrocyte aggregation (rheological variables), partial pressure of oxygen and laser Doppler flowmetry in the finger region, and lymphocyte phenotyping and interleukin (IL) determinations (immunological variables). Results: Laser Doppler flowmetry revealed significant differences between patients with secondary Raynaud’s phenomenon and a control group of 25 healthy subjects. Laser Doppler readings did not change significantly as a result of the treatments. Therapy with iloprost produced a reduction in IL-1beta, L-selectin (CD 62 L) and IL-6. Conclusion: The change in immunological variables due to iloprost may explain the long-term effects of prostaglandins in the treatment of Raynaud’s phenomenon. From our results it is not possible to infer any preference for iloprost or alprostadil.

scholarly journals WALANT–Epinephrine injection may lead to short term, reversible episodes of critical oxygen saturation in the fingertips

2021 ◽  
Vol 141 (3) ◽  
pp. 527-533
Author(s):  
P. Moog ◽  
M. Dozan ◽  
J. Betzl ◽  
I. Sukhova ◽  
H. Kükrek ◽  
...  
Keyword(s):  
Blood Flow ◽  
Oxygen Saturation ◽  
Substantial Reduction ◽  
Tissue Perfusion ◽  
Critical Levels ◽  
Short Term ◽  
Doppler Flowmetry ◽  
Epinephrine Injection ◽  
Venous Oxygen Saturation

Abstract Introduction Although the WALANT technique’s long-term safeness has been demonstrated in many studies, there are only few data investigating its short-term effects on tissue perfusion and oxygen levels. It was hypothesized that, temporarily, critical levels of tissue perfusion may occur. Methods Seventeen patients, who were scheduled for different procedures in WALANT technique, were injected with 5–7 ml of 1% Articain containing 1:200,000 epinephrine at the finger base. Capillary-venous oxygen saturation, hemoglobin volume in the capillaries, and relative blood flow in the fingertips were recorded once per second by white light spectrometry and laser Doppler flowmetry before, during and after injection for an average of 32 min. Results Clinically, no persistent tissue malperfusion was observed, and there were no postoperative complications. Capillary-venous oxygen saturation was reduced by ≥ 30% in seven patients. Critical levels of oxygen saturation were detected in four patients during 13 intervals, each lasting for 132.5 s on average. Oxygen saturation returned to noncritical values in all patients by the end of the observation period. Blood flow in the fingertips was reduced by more than 30% in nine patients, but no critical levels were observed, as with the hemoglobin. Three patients demonstrated a reactive increase in blood flow of more than 30% after injection. Conclusions Injection of tumescent local anesthesia containing epinephrine into finger base may temporarily cause a substantial reduction in blood flow and lead to critical levels of oxygen saturation in the fingertips. However, this was fully reversible within minutes and does not cause long-term complications.

The effectiveness of early local administration of hyaluronic acid in experimental traumatic ischemia of the limb muscles

2021 ◽  
Author(s):  
A.V. Shulepov ◽  
I.A. Shperling ◽  
Yu.V. Yurkevich ◽  
N.V. Shperling
Keyword(s):  
Oxygen Consumption ◽  
Hyaluronic Acid ◽  
Oxygen Saturation ◽  
Wistar Rats ◽  
Soft Tissues ◽  
Local Administration ◽  
Compression Injury ◽  
Doppler Flowmetry ◽  
Muscle Ischemia ◽  
Male Wistar Rats

The experiments were performed on 280 male Wistar rats weighing 300-340 g. The design of the study included: modeling of compression injury of the soft tissues of the thigh, local injection of the preparation of hyaluronic acid "Gialift 3.5" into the area of damage 3 hours after the cessation of compression, taking into account the results after 7, 14 and 28 days. The introduction of hyaluronic acid into the area of compression injury of soft tissues reduces the severity of myoglobinemia, increases the immunohistochemical density of VEGF-positive cells, improves the perfusion characteristics of microcirculation, oxygen saturation, and specific oxygen consumption by tissues. Keywords: traumatic muscle ischemia, hyaluronic acid, myoglobin, microcirculation, metabolism, laser Doppler flowmetry, morphometry.

P6480Asymmetric dimethylarginine (ADMA) predicts altitude-associated hypoxic pulmonary arterial hypertension

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
R H Boeger ◽  
P Siques ◽  
J Brito ◽  
E Schwedhelm ◽  
E Pena ◽  
...  
Keyword(s):  
Pulmonary Hypertension ◽  
Logistic Regression ◽  
Oxygen Saturation ◽  
High Altitude ◽  
Sea Level ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Arterial Blood ◽  
Pulmonary Arterial

Abstract Prolonged exposure to altitude-associated chronic hypoxia (CH) may cause high altitude pulmonary hypertension (HAPH). Chronic intermittent hypobaric hypoxia (CIH) occurs in individuals who commute between sea level and high altitude. CIH is associated with repetitive acute hypoxic acclimatization and conveys the long-term risk of HAPH. As nitric oxide (NO) is an important regulator of systemic and pulmonary vascular tone and asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of NO synthesis that increases in hypoxia, we aimed to investigate whether ADMA predicts the incidence of HAPH among Chilean frontiers personnel exposed to six months of CIH. We performed a prospective study of 123 healthy male subjects who were subjected to CIH (5 days at appr. 3,550 m, followed by 2 days at sea level) for six months. ADMA, SDMA, L-arginine, arterial oxygen saturation, systemic arterial blood pressure, and haematocrit were measured at baseline and at months 1, 4, and 6 at high altitude. Acclimatization to high altitude was determined using the Lake Louise Score and the presence of acute mountain sickness (AMS). Echocardiography was performed after six months of CIH in a subgroup of 43 individuals with either good (n=23) or poor (n=20) aclimatization to altitude, respectively. Logistic regression was used to assess the association of biomarkers with HAPH. 100 study participants aged 18.3±1.3 years with complete data sets were included in the final analysis. Arterial oxygen saturation decreased upon the first ascent to altitude and plateaued at about 90% during the further course of the study. Haematocrit increased to about 47% after one month and remained stable thereafter. ADMA continuously increased and SDMA decreased during the study course, whilst L-arginine levels showed no distinct pattern. The incidence of AMS and the Lake Louise Score were high after the first ascent (53 and 3.1±2.4, respectively) and at one month of CIH (47 and 3.0±2.6, respectively), but decreased to 20 and 1.4±2.0 at month 6, respectively (both p<0.001 for trend). In echocardiography, 18 participants (42%) showed a mean pulmonary arterial pressure (mPAP) greater than 25 mm Hg (mean ± SD, 30.4±3.9 mm Hg), out of which 9 (21%) were classified as HAPH (mPAP ≥30 mm Hg; mean ± SD, 33.9±2.2 mm Hg). Baseline ADMA, but not SDMA, was significantly associated with mPAP at month 6 in univariate logistic regression analysis (R = 0.413; p=0.007). In ROC analysis, a cut-off for baseline ADMA of 0.665 μmol/l was determined as the optimal cut-off level to predict HAPH (mPAP >30 mm Hg) with a sensitivity of 100% and a specificity of 63.6%. ADMA concentration increases during long-term CIH. It is an independent predictive biomarker for the incidence of HAPH. SDMA concentration decreases during CIH and shows no association with HAPH. Our data support a role of impaired NO-mediated pulmonary vasodilation in the pathogenesis of high altitude pulmonary hypertension. Acknowledgement/Funding CONICYT/FONDEF/FONIS Sa 09I20007; FIC Tarapaca BIP 30477541-0; BMBF grant 01DN17046 (DECIPHER); Georg & Jürgen Rickertsen Foundation, Hamburg

scholarly journals Breathing-coordinated exercise improves the quality of life in hemodialysis patients.

1995 ◽  
Vol 6 (5) ◽  
pp. 1392-1400
Author(s):  
T J Tsai ◽  
J S Lai ◽  
S H Lee ◽  
Y M Chen ◽  
C Lan ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Oxygen Consumption ◽  
Maximal Oxygen Consumption ◽  
Vena Cava ◽  
Hemodialysis Patients ◽  
Exercise Group ◽  
Control Group ◽  
Abdominal Sonography ◽  
Doppler Flowmetry

Breathing-coordinated exercise is a traditional Chinese exercise. These exercise maneuvers consist of slow diaphragmatic breathing, end-inspiratory pause, and Kegel's exercise. A total of 30 patients were enrolled in this study, with 12 patients as controls, to evaluate its effect on hemodialysis patients. Exercise was performed for 25 to 30 min twice a day for at least 3 months. Results from the exercise group showed a subjective improvement in appetite and physical strength, and an increase in the frequency of bowel movements, in addition to enhanced sexual activity and a significant increase in Karnofsky scores. Six patients in the exercise group underwent bicycle ergometry and demonstrated a stable maximal oxygen consumption, whereas the control group revealed a decline in maximal oxygen consumption. Photoelectric plethysmography and laser-Doppler flowmetry demonstrated a pulsatile enhancement of the peripheral microcirculation. Abdominal sonography revealed an oscillatory change in the diameter of the inferior vena cava. It was concluded that these gentle exercise maneuvers may improve the quality of life in hemodialysis patients, especially weak dialysis patients. The mechanism may be partly related to an improvement in microcirculation.

scholarly journals EFFICACY OF FREE AUTOVENOUS TRANSPLANT IN FEMORAL-POPLITEAL BYPASS BELOW THE JOINT SPACE OF THE KNEE

2016 ◽  
Vol 175 (4) ◽  
pp. 75-79
Author(s):  
B. S. Sykovatykh ◽  
L. N. Belikov ◽  
M. B. Sykovatykh ◽  
D. V. Sidorov ◽  
M. A. Inarkhov ◽  
...  
Keyword(s):  
Blood Flow ◽  
Joint Space ◽  
Arterial Blood Flow ◽  
Control Group ◽  
Treatment Technology ◽  
Critical Ischemia ◽  
Shunt Thrombosis ◽  
Atherosclerotic Lesions ◽  
Arterial Blood

The article presents an analysis of complex examination and treatment of 60 patients with critical ischemia of the lower extremities due to atherosclerotic lesions of femoral-poplitealtibia segment. Typical traditional autovenous bypass of reverse big saphena was performed for the first (control) group of patients. The operation, which used an original technology by free autovenous transplant with collapsed valves without vein reverse, was completed for the second (experimental) group of patients. An application of original treatment technology allowed an increase of blood flow volume in the extremity in 1,5 times, an arterial blood flow - in 1,6 times, rate of microcirculation - in 1,3 times. An early postoperative complications were decreased on 23,4%, the late shunt thrombosis - on 40%. Long-term shunt passability was improved in 2,6 times and physical component of health - on 10,6%, psychological - on 4,3%. The shunt functioned in 36,7% of the first group and in 83,3% patients of the second group after two years since operation. The extremity was saved in 60% of the first group and 90% patients of the second group.

scholarly journals Clinical efficacy of combinations of nebulised fluticasone, salbutamol and furosemide on lung function in premature calves with respiratory distress syndrome

2017 ◽  
Vol 62 (No. 10) ◽  
pp. 541-552 ◽  
Author(s):  
R. Yildiz ◽  
M. Ok
Keyword(s):  
Carbon Dioxide ◽  
Respiratory Distress Syndrome ◽  
Respiratory Distress ◽  
Oxygen Saturation ◽  
Distress Syndrome ◽  
Blood Gas Analysis ◽  
Gas Analysis ◽  
Control Group ◽  
Peripheral Oxygen Saturation ◽  
Arterial Blood

Surfactant deficiency, poor development of the lung structure and fibrosis as a result of inflammation are thought to play an important role in the development of respiratory distress syndrome in premature calves. Nebulised steroid (fluticasone), bronchodilator (salbutamol) and diuretics (furosemide) can be used in combination alongside standard treatment procedures for premature calves, and might improve viability as observed in infants, foals and horses with pulmonary disorders. Twenty-five premature calves with respiratory distress syndrome were used in this study. Oxygen and supportive treatment were administered to all groups. The first group was used as a control group (Group 1). The nebulised drug combinations were as follows: Group 2: fluticasone + salbutamol, Group 3: salbutamol + furosemide, Group 4: fluticasone + furosemide and Group 5: fluticasone + salbutamol + furosemide. During the 72-h time period of the study, fluticasone (15 µg/kg/12 h), salbutamol (0.025 mg/kg/6 h) and furosemide (1 mg/kg/12h) were applied for 5 min. Arterial blood samples were collected from the auricular artery at 0 h and at 1, 24, 48 and 72 h for blood gas analysis. Significant (P &lt; 0.05) increases in arterial partial oxygen, oxygen saturation and peripheral oxygen saturation and decreases in arterial partial carbon dioxide, lactate and respiration rate were observed in all the nebulised treatment groups, while a statistical difference was observed only for arterial partial carbon dioxide in control group. When comparing the treated groups with the control, it may be concluded that nebulised drugs are highly effective in the therapy of premature calves with respiratory distress syndrome, while the different nebulised groups exhibited similar efficacies.

scholarly journals Health of the intensively treated hemophiliac, with special reference to abnormal liver chemistries and splenomegaly

Blood ◽  
1977 ◽  
Vol 50 (1) ◽  
pp. 1-9 ◽  
Author(s):  
PH Levine ◽  
BA McVerry ◽  
B Attock ◽  
KM Dormandy
Keyword(s):  
Liver Function ◽  
Prospective Study ◽  
Special Reference ◽  
Healthy Volunteers ◽  
Hepatic Function ◽  
Control Group ◽  
Long Term Observation ◽  
A Prospective Study ◽  
Infusion Regimen

Liver function abnormalities have been noted in intensively treated hemophiliacs, and have led to less aggressive application of pooled plasma products by some physicians. In a prospective study, liver function was abnormal in 68 of 98 hemophiliacs. The abnormalities of hepatic function tended to persist over a 1-yr study period. There was no correlation between these abnormalities and the age of the patient, the presence of hepatitis-associated antigen or antibody, the presence or absence of splenomegaly (which was found in 26 of 98 patients), the number of infusions of plasma products, the type of hemophilia, or the type of product infused. Titers of antibodies to cytomegalovirus were generally higher in hemophilic patients than in a control group of healthy volunteers. These abnormalities did not suggest that a less aggressive infusion regimen was indicated for the hemophiliac, but did suggest the need for careful long-term observation of such patients.

eNOS involved in colitis-induced mucosal blood flow increase

2007 ◽  
Vol 293 (6) ◽  
pp. G1281-G1287 ◽  
Author(s):  
Joel Petersson ◽  
Olof Schreiber ◽  
Andreas Steege ◽  
Andreas Patzak ◽  
Anna Hellsten ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Blood Pressure ◽  
Blood Flow ◽  
Vascular Resistance ◽  
Control Level ◽  
Mucosal Blood Flow ◽  
Control Group ◽  
Trinitrobenzene Sulfonic Acid ◽  
Doppler Flowmetry ◽  
Arterial Blood

The role of NO in inflammatory bowel disease is controversial. Studies indicate that endothelial nitric oxide synthase (eNOS) might be involved in protecting the mucosa against colonic inflammation. The aim of this study was to investigate the involvement of nitric oxide (NO) in regulating colonic mucosal blood flow in two different colitis models in rats. In anesthetized control and colitic rats, the distal colon was exteriorized and the mucosa visualized. Blood flow (laser-Doppler flowmetry) and arterial blood pressure were continuously monitored throughout the experiments, and vascular resistance was calculated. Trinitrobenzene sulfonic acid (TNBS) or dextran sulfate sodium (DSS) was used to induce colitis. All groups were given the NOS inhibitor Nω-nitro-l-arginine (l-NNA) or the inducible NOS (iNOS) inhibitor l- N6-(1-iminoethyl)-lysine (l-NIL). iNOS, eNOS, and neuronal NOS (nNOS) mRNA in colonic samples were investigated with real-time RT-PCR. Before NOS inhibition, colonic mucosal blood flow, expressed as perfusion units, was higher in both colitis models compared with the controls. The blood flow was reduced in the TNBS- and DSS-treated rats during l-NNA administration but was not altered in the control group. Vascular resistance increased more in the TNBS- and DSS-treated rats than in the control rats, indicating a higher level of vasodilating NO in the colitis models. l-NIL did not alter blood pressure or blood flow in any of the groups. iNOS and eNOS mRNA increased in both colitis models, whereas nNOS remained at the control level. TNBS- and DSS-induced colitis results in increased colonic mucosal blood flow, most probably due to increased eNOS activity.

scholarly journals Comparative assessment of blood circulation at critical zones of anastomoses in urinary bladder reconstruction with iliac graft

2013 ◽  
Vol 94 (2) ◽  
pp. 190-193
Author(s):  
M I Nesterov ◽  
R A Akhmedov ◽  
M R Ramazanov ◽  
R Kh Galeev ◽  
M M Ramazanov
Keyword(s):  
Urinary Bladder ◽  
Oxygen Saturation ◽  
Urinary Bladder Cancer ◽  
Main Group ◽  
Control Group ◽  
Tissue Viability ◽  
Arterial Blood ◽  
Bladder Reconstruction ◽  
Critical Zones ◽  
Special Examination

Aim. To improve the instant results of urinary bladder reconstruction with iliac graft by examination of critical zones. Methods. Urinary bladder reconstruction using the iliac autograft was performed in 15 patients without special examination of critical zones (control group) and in 25 patients in whom these zones were examined (main group). Mean age of patients was 58 years (from 44 to 68). All patients underwent cystectomy because of urinary bladder cancer (stages T2-4N0M0). Blood microcirculation at the stitch area was performed by M.Z. Sigal, tissue viability index by M.R. Ramazanov was calculated, oxygen saturation of arterial blood was measured and microcirculatory blood flow was examined by the LAKK-01 machine. The same surgery and research methods were performed in 70 dogs with regular assessment of microcirculation at the stitch area (stitch color, arterial pulsation) and using the tensiometry by M.Z. Sigal, microcirculation at the stitch area, oxygen saturation of arterial blood and stitch tissue viability index were also determined. Results. In patients of the control group, in whom the condition of critical zones was not examined, 3 has developed a stitch dehiscence at the zones of anastomosis, with no such events registered in patients from the main group, in whom critical zones were examined. In dogs stitch dehiscence was not observed only in the group where microcirculation was assessed by tissue viability index calculation. Conclusion. It is important to examine critical zones of the iliac autograft and calculate the stitch tissue viability index performing urinary bladder reconstruction with iliac graft to prevent the stitch dehiscence.

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