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Biomedical subjects

C Gardikas

Publications and source records attributed to C Gardikas.

At least 19 recordsLinked to original sources
PubMed1979

Effective time of the forced expiratory spirogram in health and airways obstruction.

We have calculated the effective time (t eff) of the forced expiratory spirogram in healthy non-smokers, in patients with simple chronic bronchitis, and in patients with chronic obstructive lung disease. Effective time was obtained by dividing the area underneath the forced expiratory spirogram by the forced vital capacity (FVC) and is equal to the time constant of lung emptying if the FVC-time curve is a single exponential. In 75 healthy non-smoking adults, t eff showed a linear increase with age but no difference between the sexes. In 37 patients with low forced expiratory volume in one second (FEV1)/FVC ratios, t eff, as expected, was increased. In 19 subjects with simple chronic bronchitis and normal FEV1/FVC ratios, t eff was longer than or at the upper limit of 2 SE above the mean for healthy subjects of the same age. A comparison of t eff with FEV1/FVC suggested that in most normal subjects and patients the forced expiratory spirogram was a multiple exponential and that t eff was a more sensitive index for the evaluation of airway obstruction than the FEV1/FVC ratio.

Adult↗
PubMed1977

Cytogenetic studies in preleukaemia using the G-banding staining technique.

15 patients with preleukaemia were cytogenetically studied during the preleukaemic state by using the G-banding staining technique. It was found that 9 patients had a completely normal karyotype, while the other 6 showed various chromosomal abnormalities, numerical (trisomies in 5 cases) and structural (deletion in 1 case and a marker chromosome in 1 case). The abnormalities concerned group C in all 6 cases, while group A was involved in 3 cases. G-banding technique revealed that trisomy C affected the chromosomes nos 8 (2 cases) and 9 (3 cases); also a deleted chromosome 11 (11q-) was identified in 1 case and a marker chromosome in 1, the origin of which was established as a translocation between chromosomes 3 and 6. The abnormalities of group A concerned chromosome no 3. The abnormalities found in our cases, using the G-banding technique, were similar to those described in acute leukaemia.

Aged↗
PubMed1977

Familial thrombosis due to antithrombin III deficiency in a Greek family.

A Greek family with hereditary antithrombin III (AT III) deficiency associated with venous thrombosis is reported. 5 members of the family were affected. In these patients, AT III and heparin cofactor activities were decreased. Immunoreactive AT III showed a positive correlation to both AT III and heparin cofactor activities. alpha2-Macroglobulin and alpha1-antitrypsin were normal. The pattern of inheritance of the defect is autosomal dominant.

Adult↗
PubMed1977

Postoperative platelet function in patients on small subcutaneous doses of heparin.

Several platelet function tests were performed on 31 patients undergoing major operations, who recieved prophylactically small subcutaneous doses of heparin. A group of 15 similar patients without heparin served as controls. It was found that postoperatively in both groups (a) the platelet retention in glass bead column was significantly increased (p less than 0.001), (b) the platelet aggregation by ADP 1 micronM was slightly increased, (c) the collagen-induced aggregation, ADP release and the bleeding time remained unchanged and (d) the platelet counts decreased in the first 2 postoperative days and increased thereafter. There was no difference between patients on heparin and controls.

Adenosine Diphosphate↗
PubMed1977

Erythrocyte delta-aminolaevulinic acid dehydratase, urinary porphyrins and porphyrin precursors in iron deficiency anaemia.

In 20 iron deficient patients and 21 normal controls the activity of the enzyme delta-ALA dehydratase of erythrocytes was assayed. In addition the urine porphyrins and porphyrin precursor excretions were measured. It was found that in sideropenic patients the erythrocyte delta-ALA dehydratase activity was almost constantly higher than in normals; the difference of the mean values being statistically significant (p less than 0.005). A significant diminution of delta-ALA (p less than 0.0025) urine excretion was observed, whereas the urine excretion of PBG, CP and UP was found within the normal limits. The results are compared to those reported by other authors.

Anemia, Hypochromic↗
PubMed1976

Increased proportion of B lymphocytes in human tonsils and appendices.

The percentage of T and B lymphocytes was studied in human tonsils and appendices. An increased percentage of B lymphocytes, 59.1% in tonsils and 54.5% in appendices, was found, whilst the percentage of T lymphocytes was 23.6% and 27.9%, respectively. In the peripheral blood of the corresponding figures were 12.5% for B cells and 50% for T cells.

Appendix↗
PubMed1975

Plasma alpha-lipoprotein pattern in acute viral hepatitis.

In the present study, the plasma levels of lipoproteins, triglycerides, and cholesterol were followed serially in a group of 57 patients with acute viral hepatitis. Mean plasma triglyceride levels were found elevated at the onset of the disease and gradually returned to normal, while mean plasma cholesterol values, low initially, gradually increased, alpha-lipoprotein was absent at the early stage of hepatitis in 41 out of 46 patients with mild or moderate course and reappeared gradually during the course of the disease. In 11 cases of viral hepatitis with impending or overt coma, alpha-lipoprotein was absent for the whole duration of the acute stage and never reappeared in those who eventually died, while it eventually returned to normal in those who survived. The reappearance of alpha-lipoprotein in acute viral hepatitis appears to be a sensitive index of improvement and a significant prognostic sign.

Acute Disease↗
PubMed1975

Hypercoagulability and hypofibrinolysis in sickle-cell disease.

Fifty-two patients with sickle-cell (SC) disease (48 with SC-beta-thalassaemia and 4 with homozygous SC-anaemia) were studied as regards blood coagulation and fibrinolysis. It was found that the thrombin and the reptilase times of the patients' plasma were significantly shorter than normal. The mean values of platelet count, fibrinogen level and factor VIII activity of patients with SC disease were higher than normal; however, in the group of patients transfused, with less than 50% haemoglobin S (HbS), the fibrinogen level and the factor VIII activity were significantly lower compared to the other patients. Antithrombin-III (At-III) activity was normal in all. The fibrinolytic activity was normal in patients with asymptomatic SC disease, but reduced in patients on painful crises. Plasminogen and fibrinogen/fibrin degradation product (FDP) levels were normal in all patients. Two patients on painful crises with complications had additional abnormal findings, namely prolonged prothrombin time, reduced At-III level and elevated FDP.

Adolescent↗
PubMed1975

Urine porphyrins and their precursors in homozygous beta-thalassaemia.

In 68 patients with homozygous beta-thalassaemia the excretion of porphyrins and porphyrin precursors in urine has been assayed. Though a definite excretion pattern has not been established, the majority of the thalassaemics excrete an increased amount of coproporphyrin and porphobilinogen. The results are compared to those published by other authors.

Adolescent↗