Search PubMed⌕ Search

Biomedical subjects

F Hashimoto

Publications and source records attributed to F Hashimoto.

At least 55 records · Page 3Linked to original sources
PubMed1986

Free peroneal flap coverage of the great toe defect resulting from a wrap-around flap transfer.

In thumb reconstruction, the wrap-around free flap from the great toe with distal terminal phalanx attached gives a better replica of a thumb esthetically and functionally and has many advantages. However, there are problems in the great toe, such as delayed wound healing, pain caused by long-time walking, ulceration, and skin erosion. We closed the skin defect of the great toe with a free peroneal flap in seven cases. In all cases of both the wrap-around flap and peroneal flap complete healing was obtained after the operation without trouble. The donor great toe causes no significant morbidity.

Adult↗
PubMed1986

The suppressive effect of gammaglobulin preparations on in vitro pokeweed mitogen-induced immunoglobulin production.

The effect of the supplementation with several gammaglobulin (GG) preparations on the in vitro immunoglobulin synthesis of peripheral blood mononuclear cells (PBMC) from normal subjects stimulated with pokeweed mitogen (PWM) was studied. Among the GG preparations used in this study, immune serum globulin (ISG) demonstrated the most suppressive effect, and S-sulfonation and polyethylene glycol (PEG)-treated preparations also had a suppressive effect. However, the preparation of pepsin degradation had no suppressive effect. And because IgG F(ab')2 fragments also failed to induce the suppressive effect, it was considered to be triggered by the attachment of the Fc portion of GG to the corresponding membrane receptor. To determine the cellular targets, PBMC were fractionated into E-rosetting cells (T cells) and non E-rosetting cells (B cells). The suppressive effect was induced by pre-incubation of either T cells or B cells with the GG preparations for 1 h, at 37 degrees C in PWM-induced immunoglobulin (Ig) production. The failure of T cells pretreated with OKT8 monoclonal antibody and complement to induce the suppressive effect suggested that T8 positive T cells are one of the effector cells involved. The activation step of the suppressive effect was prostaglandin E2-independent, and as effector cells contain an Fc receptor which is sensitive to pronase, it was suggested that monocytes were not involved in this activation process. Our observations further suggested that the Ig effects of GG therapy are not limited to antibody transfer, since GG preparations also suppress directly the differentiation of B cells and induce suppressor T cells in in vitro immunoglobulin production stimulated with PWM.

Dose-Response Relationship, Immunologic↗
PubMed1986

[Effects of the intravenous injection of an ionic contrast medium on the circulating plasma volume: an assessment with plasma colloid oncotic pressure].

UNLABELLED: We investigated effects of intravenous injection of ionic contrast medium (ICM) on circulating plasma volume (CPV) by measurements of changes in plasma colloid oncotic pressure (COP). METHOD: ICM (60% meglumine iothalamate 30 ml) was injected intravenously as a bolus into 7 healthy male volunteers. The venous blood samples were drawn before, and 1, 2, 3, 5 and 10 minutes after the injection. Relatively massive doses of the ICM (150-180 ml) were infused intravenously into 6 male cardiac patients with normal cardiac and renal function during ECG gated cardiac X-ray computed tomography. The blood samples were drawn before, soon after and an hour after the infusion. The plasma COP values of the blood samples were measured with a needle-type osmometer and the sequences of CPV were estimated from the changes of COP values. RESULTS: The bolus injection of the ICM increased the CPV by 10%, 8-9 ml of the CPV per 1 ml of the ICM, and the increase continued during the study (at least for 10 minutes). The massive infusion of the ICM resulted in about 20% increase of the CVP soon after the infusion, and then induced a diuletic effect. The CVP returned to the basal level in one hour, but some patients became rather dehydrated. CONCLUSION: These findings suggested that an intravenous injection of ICM produced considerable expansion of CPV and subsequent dehydration. Careful considerations would be necessary when patients with impaired cardiac or renal function are treated with intravenous ICM during X-ray computed tomography or digital subtraction angiography.

Adult↗
PubMed1985

Palm temperature monitoring during exercise in patients with heart disease.

The quantitative use of palm temperature changes during a fixed-load treadmill exercise was evaluated in normal subjects and patients with various degrees of cardiac disability. Treadmill exercise revealed different temperature patterns between subject groups. Normal subjects showed an initial transient decrease to a plateau phase, followed by a prompt return to the control level after cessation of exercise. Cardiac patients with severe disabilities showed a progressive decrease during and even after exercise, and the return to the control level was delayed. Patients with less severe cardiac disabilities showed an intermediate pattern. A significant correlation was observed between the temperature pattern and the plasma catecholamine concentration. The simultaneous measurement of forearm and hand blood flow, and palm temperature during a supine ergometer exercise showed that the temperature change reflected the blood flow changes. In conclusion, palm temperature monitoring during treadmill exercise is a simple and useful method for assessment of the vasoconstrictor response to exercise and, therefore, the pattern of temperature changes indicates indirectly the exercise capacity in heart disease.

Blood Pressure↗
PubMed1984

[The effect of gammaglobulin preparations on in vitro immunoglobulin production induced by pokeweed mitogen].

It has been recognized in the experiments of animals, that high dose of administration of IgG suppresses the immunoglobulin production in vitro, because of masking of antigen determinants. The study evaluated the effect of several gammaglobulin preparations on in vitro immunoglobulin production induced by pokeweed mitogen. And the effect of these preparations was estimated by following system. Mononuclear cells (5 X 10(5)/ml) were incubated (37 degrees C, 5% CO2) in the presence of gammaglobulin preparations (0.01 mg/ml-1.0 mg/ml). On the sixth day of culture, the cells were spun down, washed three times, resuspended in MEM without L-4,5 [3H]-leucine. After 24 hours, supernatants were harvested, and the concentration of immunoglobulin produced by mononuclear cells was analyzed by solid-phase RIA. And the results which have been obtained as follows. PWM induced immunoglobulin production (IgG) was analyzed in the presence of immunoglobulin preparations. Among these preparations, the suppressive effect of ISG was most significant, and the effect was dose dependent. S-sulfonated and PEG-treated preparations also suppressed the IgG production, but not so strong as ISG. In the suppressive effect between S-sulfonation and PEG treatment, no significant difference was found. Pepsin treated preparation had no suppressive effect. Not only IgG production, but also IgA, IgM production were suppressed by the co-culture of ISG, S-sulfonated, and PEG treated IgG. ISG inhibits directly the differentiation of B cells, and also induces the activation of suppressor T cells. ISG was considered to suppress immunoglobulin production in vitro by these both pathways. The suppressor T cells, which are induced by ISG, are radiation resistant, hydrocortisone resistant and same population with OKT 8 positive cells.

Dose-Response Relationship, Drug↗
PubMed1984

Differences between right and left arm blood pressures in the elderly.

Recommendations vary on whether blood pressures should be measured in the right or in the left arm because no frequency distributions for a pressure difference between the arms exist. We took a total of 12 blood pressure determinations in both arms of 174 elderly persons and analyzed the data by a least-squares components of variance method. The mean difference between the arms (right minus left) was 0.93 mm of mercury for systole and 0.70 mm of mercury for diastole. For systole the proportion of persons having arm pressure differences exceeding 10 mm of mercury is 1.4% and that exceeding 7.5 mm of mercury is 6.5%. For most people, the pressure difference between the arms is small.

Aged↗
PubMed1984

Neuroleptic malignant syndrome and dopaminergic blockade.

After receiving 90 mg of haloperidol and 100 mg of chlorpromazine hydrochloride within 25 hours, a 29-year-old man was found to have neuroleptic malignant syndrome (NMS), characterized by the acute onset of hyperpyrexia, extreme muscular rigidity, autonomic instability, and coma. Subsequently, rhabdomyolysis developed, with myoglobinuric renal failure and bilateral anterior tibial compartment syndromes. The patient's initial neuroleptic levels were in the therapeutic and nontoxic ranges. He was treated with supportive measures and his clinical improvement was paralleled by decreased neuroleptic levels, a return toward normal of an elevated prolactin level, and an increased responsiveness to a dopamine hydrochloride infusion. This supports an association between NMS and dopamine receptor blockade.

Adult↗
PubMed1983

An improved method for separation of low-molecular-weight polypeptides by electrophoresis in sodium dodecyl sulfate-polyacrylamide gel.

An improved system for SDS-polyacrylamide gel electrophoresis, capable of analyzing polypeptides having molecular weights from 1500 to 100,000 (especially showing high resolving power in the 1500 to 25,000 molecular weight range) is described. The 10 to 18% linear gradient gel containing 7 M urea with an acrylamide:bisacrylamide ratio of 20:1 and the Laemmli discontinuous buffer was used. The use of the gel with a high crosslinkage ratio is shown to be effective in lowering the leakage of low-molecular-weight polypeptides from the gel. This method has facilitated rapid detection of small amounts of low-molecular-weight polypeptides in body fluids by the use of silver stain. A procedure is presented for the elimination of false bands on the gel frequently encountered during silver staining. The separation patterns of enzymatic cleavage products of proteins, uremic plasma, and urines from nephropathy patients are illustrated. This system is also applicable in the separation of lipopolysaccharides and also for the detection of phospholipids.

Electrophoresis, Polyacrylamide Gel↗
PubMed1983

Determination of anaerobic threshold for assessment of functional state in patients with chronic heart failure.

The use of anaerobic threshold in assessment of aerobic capacity was evaluated in 34 normal subjects and 47 patients with various kinds of chronic heart disease. Anaerobic threshold was determined as the oxygen consumption (VO2) at which a linear relationship between pulmonary ventilation (VE) and VO2 was lost during progressive treadmill exercise. Anaerobic threshold determined in this manner was validated with that determined by blood lactate measurements in eight normal subjects and nine cardiac patients (r = .962, p less than .001). Thereafter, anaerobic threshold was determined only by respiratory measurements. In symptom-limited, maximal exercise, anaerobic threshold was reached well before maximal effort and corresponded to 70% of maximal VO2 both in normal subjects and cardiac patients. Anaerobic threshold decreased as age progressed in normal subjects (r = - .70, p less than .001). Anaerobic threshold in cardiac patients was lower than that in the normal subjects and decreased progressively as New York Heart Association functional classification advanced (normal, 32.95 +/- 6.17 ml/min/kg; class I, 22.78 +/- 3.74; class II, 16.99 +/- 3.66; class III, 12.97 +/- 2.76; p less than .01 between each group other than between class II and class III). Anaerobic threshold in cardiac patients correlated poorly with other objective indices, e.g., cardiomegaly (r = -.54, p less than .001) and rise in pulmonary wedge pressure (r = -.64, p less than .001). At anaerobic threshold, cardiac patients subjectively graded the work load as light (13%), light-to-moderate (27%), moderate (30%), and moderate-to-heavy (28%). Thus determination of anaerobic threshold by respiratory measurements is a safe, accurate, and objective method to measure aerobic capacity in cardiac patients and in normal subjects.

Adult↗
PubMed1983

[Plasma bradykinin concentration in patients with cardiovascular diseases].

The present study was undertaken to quantify the circulating kinins in patients with various cardiovascular diseases using a newly developed radioimmunoassay technique and to evaluate this method in terms of its clinical application. For the determination of bradykinin (BK), this assay uses a rabbit anti-serum which has been injected with kallidin. This assay shows good specific activity, recovery and reproducibility. In order to avoid the formation of kinin as well as to block its inactivation, human blood samples were collected with a polypropylene syringe containing an inhibitor mixture (EDTA, trasylol, 1-10-phenanthroline, soybean trypsin inhibitor, polybrene). 1) The plasma BK concentration in normal human subjects, in patients with essential hypertension, effort angina and other cardiac diseases were 12.2, 9.2, 8.0 and 14.0 pg/ml, respectively. 2) Thirty min after captopril (12.5 mg, p.o.) administration, blood pressure and pulmonary wedge pressures decreased, and cardiac output increased accompanied with increases in plasma renin activity, plasma BK concentration and plasma norepinephrine concentration. 3) During the cold pressor test, both plasma BK concentration and blood pressure increased in the normal human subjects, whereas plasma BK levels decreased and blood pressure increased in the patients with hypertension. This radioimmunoassay for plasma BK determination makes it possible to measure plasma BK concentration in patients with various cardiac diseases.

Adult↗