THE INFLUENCE OF CHANGES IN ARTERIAL BLOOD PRESSURE ON TRANSCUTANEOUS OXYGEN TENSION (tcPO2) IN THE NEWBORN

1982 ◽  
Vol 71 (3) ◽  
pp. 365-368 ◽  
Author(s):  
J. H. EICKHOFF ◽  
P. D. WIMBERLEY
PEDIATRICS ◽  
1982 ◽  
Vol 69 (5) ◽  
pp. 583-586
Author(s):  
Ronald N. Goldberg ◽  
Steven L. Goldman ◽  
R. Eugene Ramsay ◽  
Rosalyn Feller

In experimental animals neurologic damage may occur during seizure activity whether the seizure is accompanied by motor activity and hypoxemia or whether the animal is paralyzed and normoxemic. These findings suggest that it may be important to detect seizure activity in the paralyzed neonate. Nine infants who were mechanically ventilated and paralyzed with pancuronium had their condition diagnosed as seizure activity. Vital signs were continuously monitored and six infants had either oxygen saturation or transcutaneous oxygen measured during seizure activity. For the group as a whole, rhythmic fluctuations in vital signs, cardiac rhythm, and oxygenation occurred every four minutes (range one to seven minutes) and lasted two minutes (range one to four minutes). In seven patients whose seizures were not accompanied by cardiac arrhythmias the following mean increases were noted: systolic arterial blood pressure, 15 mm Hg (range 7 to 36 mm Hg); heart rate, ten beats per minute (-11 to 30/min); oxygen saturation, 12% (range 4% to 20%); and transcutaneous oxygen, 31 mm Hg (range 14 to 45 mm Hg). Seizures in the two patients with cardiac arrhythmias were accompanied by a decrease in systolic arterial blood pressure of 27 mm Hg (range 15 to 40 mm Hg) and in oxygen saturation of 24% (range 20% to 28%). The presence of rhythmic fluctuation in vital signs and oxygenation should alert the physician to the possibility of seizure activity in the paralyzed neonate.


Perfusion ◽  
2011 ◽  
Vol 26 (6) ◽  
pp. 510-515 ◽  
Author(s):  
V Lonsky ◽  
V Svitek ◽  
V Brzek ◽  
J Kubicek ◽  
M Volt ◽  
...  

Background: Regional hypoperfusion has been associated with the development of postoperative organ dysfunction in cardiac surgery involving cardiopulmonary bypass (CPB). Direct tissue oxymetry is a potentially new method for monitoring the quality of the peripheral tissue perfusion during CPB. The aim of this study was to assess the effects of CPB in skeletal muscle oxygenation when measured in the deltoid muscle by direct oxymetry during perioperative period. Method: Seven patients underwent on-pump coronary artery bypass grafting. Direct oxymetry was performed by an optical cathether introduced into the deltoid muscle. Continuous measurement was made during the surgical procedure and the postoperative period. Mean arterial blood pressure, blood flow during CPB, laboratory markers of tissue hypoperfusion, blood gases and body temperature were also recorded. Results: Interstitial muscle tissue oxygen tension (pO2) decreased after the introduction to anaesthesia and, more significantly, during CPB. After the disconnection from CPB at the end of the operation, the pO2 returned to pre-anaesthetic values. During the first hours after admission of the patients to the intensive care unit, the pO2 progressively decreased, reached a minimum value after four hours, and increased slowly thereafter. There was a significant correlation of pO2 with mean arterial blood pressure and blood flow during that time. Conclusion: The result of this first measurement seems to demonstrate that the standard technique of conducting cardiopulmonary bypass produces low muscle oxygen tension and, thus, little perfusion of skeletal muscle. The data also indicate that both high mean arterial blood pressure and high flow are necessary during CPB to ensure skeletal muscle perfusion. The investigation is continuing.


Angiology ◽  
1991 ◽  
Vol 42 (6) ◽  
pp. 481-490 ◽  
Author(s):  
Andrew W. Gardner ◽  
James S. Skinner ◽  
Bradford W. Cantwell ◽  
L. Kent Smith ◽  
Edward B. Diethrich

2020 ◽  
pp. 17-18
Author(s):  
S.V. Bolgarska

Background. Diabetic foot syndrome (DFS) is the presence of an infection and/or ulcer defect of the foot associated with neuropathy and circulatory disorders of the lower extremities of varying severity. Insensitivity of the foot, its deformation and constant load lead to the formation of necrosis under hyperkeratosis with the potential infectious process development. Objective. To describe the features of the course and treatment of DFS. Materials and methods. Analysis of literature data on this issue. Results and discussion. Classification of diabetic ulcers is carried out according to the PEDIS system, where P means perfusion, E – extent, D – depth, I – infection, S – sensation. To assess the circulatory status of the lower extremities, the ankle-brachial index (ABI) and transcutaneous oxygen tension are determined. Critical ischemia is determined by the following criteria: tibial systolic blood pressure <50 mm Hg, big toe blood pressure <30 mm Hg, or transcutaneous oxygen tension <30 mm Hg, or ABI <0.5. DFS treatment involves unloading the foot with the help of special shoes or orthoses, ultrasonic or vacuum cavitation of wounds, surgery, antibiotic therapy. If necessary, anti-pseudomonad antibiotics should be used (ceftazidime, cefoperazone, cefepime, imipenem, meropenem, ciprofloxacin, amikacin). 95 % of the microorganisms present in the world are able to coexist in the form of biofilms – communities of microorganisms in a matrix of polymers (mucopolysaccharides), which are released by the same bacteria. Taking this into account, one should choose antibiotics that can penetrate biofilms. Diabetic ulcers should be covered with dressings such as Hydroclean plus, which contain an antiseptic that protects the wound from secondary infection, prevents excessive evaporation of moisture and has an atraumatic contact layer that prevents traumatization of the young granulation tissue. This dressing continuously releases Ringer’s solution into the wound and absorbs the wound exudate, creating a continuous washing effect. Lacerta (“Yuria-Pharm”) can be used to stimulate the regeneration of long-term defects of connective tissues. Lacerta activates the migration and proliferation of fibroblasts, accelerates their metabolic activity, and enhances angiogenesis. Other methods of accelerating of the wound healing include the use of cryopreserved amniotic membranes and the injection of stem cells. Conclusions. 1. DFS is the presence of an infection and/or ulcerative defect of the foot associated with neuropathy and circulatory disorders of the lower extremities. 2. Classification of diabetic ulcers is carried out according to the PEDIS system. 3. Treatment of DFS involves unloading the foot with special shoes or orthoses, ultrasonic or vacuum cavitation of wounds, antibiotic therapy, surgery. 4. It is advisable to cover diabetic ulcers with hydrogel bandages. 5. Lacerta can be used to stimulate the regeneration of persistent skin defects.


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