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Biomedical subjects

W Janicki

Publications and source records attributed to W Janicki.

28 records · Page 2Linked to original sources
PubMedDate not supplied

[Neurologic complications after extracorporeal circulation in the light of experimental studies].

On the basis of experimental investigations the authors describe the causes of certain complications after extracorporeal circulation. The experiments were carried out in 11 sheep. The duration of extracorporeal circulation was from 1 to 2 hours. It was found that the intracranial pressure, which is an indicator of intracranial expansion, increased with increasing time of cannule introduction into the heart and veins, with the volume of perfusing fluid given during the procedure, with falling value of the arterial blood pressure and impairment of venous return. The intracranial pressure increased also with the duration of extracorporeal circulation. Falls of the arterial blood pressure and venous return occurred simultaneously with impairment of the cerebral blood flow causing cerebral hypoxia. The results of histological examinations of brain tissue were consistent with central nervous system hypoxia, and showed also that these changes developed within the first hour of extracorporeal circulation. The complications arising after extracorporeal circulation may be due to brain oedema. Thus it would be recommendable to pay attention during preoperative management of the patients to the possibility of brain oedema as a complication of the procedure.

Animals↗
PubMedDate not supplied

[Clinico-radiological correlation and treatment of patients with absence of lumbar vertebral arch fusion].

The authors observed 88 patients (18 women and 70 men) aged 16 to 61 years with lack of lumbar vertebral arch fusion (spina bifid occulta without spinal cord involvement). In 63 cases the clinical symptom complex was that of sciatic pains, in the remaining 25 cases no neurological defect was found. In 63 cases operation was done and 45 of them intervertebral disc prolapse was found. The decision to operate was based on the refractoriness and intensity of pain, presence of neurological defect and radiculography performed in 36 cases. It is stressed that such high proportion (51%) of cases with spina bifida coexistent with lumbar disc prolapse calls for a careful analysis of the cause of pain in patients with spina bifida.

Adolescent↗
PubMedDate not supplied

[Our evaluation of clinical usefulness of continuous extradural measurement of intracranial pressure in patients with cranio-cerebral injuries].

Continuous measurements of intracranial, pressure were conducted by the extradural method in 40 patients with various types of skull trauma. A correlation was demonstrated between the value of this pressure and the clinical condition of the patient only with high values of the pressure, in which nearly always wave-like pressure changes were observed. The occurrence of wave-like changes was a more reliable sign of threatening cranial hypertension than the value of intracranial pressure. Continuous measurement of pressure during intravenous administration of glycerol demonstrated that a significant fall of pressure preceded the regression of clinical signs of intracranial hypertension.

Adolescent↗
PubMedDate not supplied

[Electromanometric extradural recording of intracranial pressure].

The author studied experimentally the method of continuous electromanometric extradural recording of intracranial pressure. In the experiments a pressure chamber is introduced into the cranial bone extradurally. The pressure is transduced to a measuring set based on Elema-Schonander electromanometer. The pressure changes are being transduced by means of a hydraulic system. The experimental material comprised 12 dogs. Intracranial pressure measurements were carried out under condtions of considerable dynamic changes of this pressure caused by removal of cerebrospinal fluid, intravenous infusion of distilled water, expanding body (a baloon placed in the extradural space), brain oedema. The investigations confirmed the value of the method. Furthermore it was found that measurements of intracranial pressure by means of suboccipital tap give false results. The results of the reported experiments served for introduction of the method for clinical use.

Animals↗