scholarly journals Intraoperative intestinal viability assessment in acute bowel obstruction

2015 ◽  
Vol 96 (2) ◽  
pp. 161-165 ◽  
Author(s):  
M I Nesterov ◽  
M R Ramazanov ◽  
M M Ramazanov ◽  
E A Aliev
Keyword(s):  
Oxygen Saturation ◽  
Bowel Obstruction ◽  
Peripheral Blood ◽  
Intestinal Resection ◽  
Suture Line ◽  
Hemoglobin Oxygen Saturation ◽  
New Device ◽  
Arterial Blood ◽  
Blood Hemoglobin ◽  
Peripheral Blood Circulation

Aim. To improve the results of surgical treatment of acute bowel obstruction by introducing a new device and a method for intraoperative assessment of intestinal viability and further choice of resection and enteroenteroanastomosis level.Methods. Our team has designed a new device for checking the arterial blood hemoglobin oxygen saturation, pulse rate, perfusion and intramural pressure in intestinal wall. A novel method for checking peripheral blood circulation was used for choosing the resection level during the surgery and for enteroenterostomy in 50 patients of the main group. Suture line viability index was also calculated using the formula proposed by M.R. Ramazanov (2008), suture line arterial blood hemoglobin oxygen saturation was also determined. Control group included 44 patients, in whom intestinal resection and enteroenterostomy for acute bowel obstruction were performed without examining the peripheral blood circulation before the device was introduced.Results.Intramural pressure in bowel obstruction area in 10 patients was significantly lower (48.4±0.6/36.3±0.6 mm Hg at arterial blood pressure of 120.2±0.8/80±0.6 mm Hg) compared to the similar parameter in 15 healthy patients (86.5±0,9/60.3±0,5 mm Hg, pConclusion. The developed device allows to adequately access the peripheral blood flow in bowel obstruction, intestinal viability index and arterial blood hemoglobin oxygen saturation might be used in bowel obstruction to specify the intestinal resection level during surgery.

scholarly journals Surgical component of lateral and central breast cancer treatment

2021 ◽  
Vol 102 (4) ◽  
pp. 479-485
Author(s):  
Z M Abdurakhmanova ◽  
M R Ramazanov ◽  
E I Sigal
Keyword(s):  
Breast Cancer ◽  
Lymph Nodes ◽  
Oxygen Saturation ◽  
Cancer Treatment ◽  
Comparison Group ◽  
Breast Cancer Treatment ◽  
Main Group ◽  
Regional Lymph Nodes ◽  
Hemoglobin Oxygen Saturation ◽  
Arterial Blood

Aim. To improve the results of the surgical component in the treatment of a nodular form of breast cancer with lateral and central localization by analyzing hemoglobin oxygen saturation of arterial blood in the foci of breast cancer, regional lymph nodes and resection line of the breast. Methods. The study involved 175 patients with a nodular form of breast cancer with lateral and central localization (T23N12M0), including 86 in the main group and 89 in the comparison group. In the main group, hemoglobin oxygen saturation in arterial blood of the foci of breast cancer, parenchyma, pectoral muscles and regional lymph nodes was examined for spread of cancer during surgery for nodular breast cancer by using a device developed by us (patent RU 2581266). This examination was not performed in the comparison group. Histopathological examination of resection specimens revealed confirmation of the main foci of breast cancer and the presence of metastases in the regional lymph nodes and pectoral muscles of the breast. Statistical analysis of the data was performed by using the Statistica 10 software. The arithmetic mean, the standard error of the mean and the standard deviation were calculated for the quantitative indicators. Results. In the main group, 86 patients had no recurrence and metastases in the follow-up, while in the comparison group, cancer recurrence was identified in 89 patients and metastases was found during cytological and histological studies in 9 patients. Conclusion. Determination of hemoglobin oxygen saturation of arterial blood during surgery in the subclavian, axillary and subscapular lymph nodes as well as in the pectoralis major and minor muscles allows clarifying the distribution of breast cancer, specifying the scope of the operation and improving the results of the surgical component of breast cancer treatment (T23N12M0).

Repeatability and accuracy of fingertip pulse oximeters for measurement of hemoglobin oxygen saturation in arterial blood and pulse rate in anesthetized dogs breathing 100% oxygen

2021 ◽  
Vol 82 (4) ◽  
pp. 268-273
Author(s):  
Tamas D. Ambrisko ◽  
Stephanie C. Dantino ◽  
Stephanie C. J. Keating ◽  
Danielle E. Strahl-Heldreth ◽  
Adrianna M. Sage ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Pulse Rate ◽  
Hemoglobin Oxygen Saturation ◽  
Arterial Blood ◽  
Anesthetized Dogs ◽  
Pulse Oximeters

Measurement of Carboxyhemoglobin and Methemoglobin by Pulse Oximetry

2006 ◽  
Vol 105 (5) ◽  
pp. 892-897 ◽  
Author(s):  
Steven J. Barker ◽  
Jeremy Curry ◽  
Daniel Redford ◽  
Scott Morgan
Keyword(s):  
Carbon Monoxide ◽  
Oxygen Saturation ◽  
Pulse Oximetry ◽  
Sodium Nitrite ◽  
Pulse Oximeter ◽  
Hemoglobin Oxygen Saturation ◽  
Arterial Blood ◽  
Human Volunteers ◽  
Oxygenation Monitoring ◽  
Intravenous Sodium

Background A new eight-wavelength pulse oximeter is designed to measure methemoglobin and carboxyhemoglobin, in addition to the usual measurements of hemoglobin oxygen saturation and pulse rate. This study examines this device's ability to measure dyshemoglobins in human volunteers in whom controlled levels of methemoglobin and carboxyhemoglobin are induced. Methods Ten volunteers breathed 500 ppm carbon monoxide until their carboxyhemoglobin levels reached 15%, and 10 different volunteers received intravenous sodium nitrite, 300 mg, to induce methemoglobin. All were instrumented with arterial cannulas and six Masimo Rad-57 (Masimo Inc., Irvine, CA) pulse oximeter sensors. Arterial blood was analyzed by three laboratory CO-oximeters, and the resulting carboxyhemoglobin and methemoglobin measurements were compared with the corresponding pulse oximeter readings. Results The Rad-57 measured carboxyhemoglobin with an uncertainty of +/-2% within the range of 0-15%, and it measured methemoglobin with an uncertainty of 0.5% within the range of 0-12%. Conclusion The Masimo Rad-57 is the first commercially available pulse oximeter that can measure methemoglobin and carboxyhemoglobin, and it therefore represents an expansion of our oxygenation monitoring capability.

Relationship of Oxygen Tension to Hemoglobin Oxygen Saturation in the Arterial Blood of Normal Men

1952 ◽  
Vol 4 (12) ◽  
pp. 873-885 ◽  
Author(s):  
Christian J. Lambertsen ◽  
Paul L. Bunce ◽  
David L. Drabkin ◽  
Carl F. Schmidt
Keyword(s):  
Oxygen Saturation ◽  
Oxygen Tension ◽  
Hemoglobin Oxygen Saturation ◽  
Arterial Blood ◽  
Normal Men ◽  
Relationship Of

Theoretical Analysis of Cerebral Venous Blood Hemoglobin Oxygen Saturation as an Index of Cerebral Oxygenation during Hypothermic Cardiopulmonary Bypass

1995 ◽  
Vol 83 (2) ◽  
pp. 405-412. ◽  
Author(s):  
Franklin Dexter ◽  
Bradley J. Hindman
Keyword(s):  
Cardiopulmonary Bypass ◽  
Oxygen Saturation ◽  
Oxygen Transfer ◽  
Cerebral Oxygenation ◽  
Venous Blood ◽  
Oxygen Solubility ◽  
Hemoglobin Oxygen Saturation ◽  
Hypothermic Cardiopulmonary Bypass ◽  
Brain Oxygen ◽  
Blood Hemoglobin

Background Jugular venous catheters and near-infrared spectroscopy can measure cerebral venous blood hemoglobin oxygen saturation (SvO2). We used computer simulation to characterize the relation between Sv02 and cerebral metabolic rate for oxygen (CMR02) during hypothermic cardiopulmonary bypass (CPB). Methods We developed a theoretical model of cerebral oxygen consumption and blood-brain oxygen transfer. Our model included the temperature dependence of blood and brain oxygen solubility; the temperature, age, and acid-base dependence of hemoglobin oxygen dissociation; and the temperature and age dependence of CMRO2. We simulated cerebral blood flow reductions that decreased Sv02 and CMR02. Results Our model predicts the relation between CMR02 and Sv02 to be dependent on temperature, because of a shift of the oxygen partial pressure at which hemoglobin oxygen saturation equals 0.50. For example, during normothermic CPB, Sv02 can decrease to 30% before CMR02 will decrease to less than 90% of normal. In contrast, for alpha-stat management of infants at 17 degrees C, Sv02 must be maintained at greater than 95% to maintain CMR02 at greater than 90% of its temperature appropriate value. Conclusions High Sv02 observed during hypothermic CPB may indicate impaired oxygen transfer from hemoglobin to brain, not "luxury perfusion." The relation between Sv02 and CMR02 depends dramatically on the temperature of the patient. Sv02 per se may not be reliable index of normal CMR02 during hypothermic CPB.

scholarly journals Assessment of the effects of energy drinks on the cardiovascular system among students of the medical science

2021 ◽  
Vol 24 (82) ◽  
pp. 23-27
Author(s):  
Jovana Trkulja ◽  
Slobodan Tomić ◽  
Sanja Tomić ◽  
Goran Malenković
Keyword(s):  
Blood Pressure ◽  
Side Effects ◽  
Oxygen Saturation ◽  
Arterial Blood Pressure ◽  
Medical Science ◽  
Energy Drinks ◽  
Energy Drink ◽  
Saturation Pulse ◽  
Hemoglobin Oxygen Saturation ◽  
Arterial Blood

Introduction: Energy potion is non-alcoholic drink, which is mostly used by young people to achieve wanted effects. But, these drinks can cause unwanted effects as well, such as cardiovascular disorder, CNS disorder and gastro-interstinal system disorder. The aim of the study was to assess the frequency of consumption of energy drinks and the knowledge of medical students regarding possible side effects, as well as to determine the acute effects after consuming energy drinks on arterial blood pressure, hemoglobin oxygen saturation, pulse and respiration. Material and methods: This study was conducted as an analytical, observational cross-sectional study at the Faculty of Medicine in Novi Sad. The Questionnaire on the level of knowledge and experience about the desired and unwanted effects of energy drinks was used as a research instrument. Results: Students consume energy drinks (80%) and have knowledge of possible side effects (88%). After consuming the energy drink, the differences between the average values of systolic and diastolic blood pressure, hemoglobin oxygen saturation and respiration rate were determined. Conclusion: The results of the study show that most students, although they have knowledge about side effects, still consume energy drinks. Changes in cardiorespiratory function after consuming an energy drink were most pronounced in the values of arterial blood pressure.

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