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Biomedical subjects

A Landi

Publications and source records attributed to A Landi.

At least 73 records · Page 4Linked to original sources
PubMed1985

Changes in visual evoked potentials in children on chronic dialysis treatment.

Visual evoked potentials (VEP) were recorded in 20 children undergoing dialysis for chronic renal failure. VEP before treatment (72 h after last dialysis) were pathological in 17 patients (85%); responses obtained 3 h after treatment were abnormal in only 6 cases (30%). Furthermore, all patients improved after treatment, except two who were unchanged. However, VEP recorded immediately after dialysis were worse in 4 of 7 patients than before treatment, probably as an effect of the dysequilibrium syndrome; they improved spontaneously afterwards. The acute changes caused by dialysis seem to be more evident in children than in adults. No correlations have been found between blood chemistry indexes and VEP modifications. Finally, VEP have proved to be more sensitive than EEG in identifying a central nervous system (CNS) dysfunction in these uremic patients.

Adolescent↗
PubMed1985

The extensor digitorum brevis muscle island flap for soft-tissue loss around the ankle.

The extensor digitorum brevis muscle flap, which has already been suggested as a local flap for the foot, has been applied by us in 2 cases with excellent results. This flap, as with other muscle flaps, provides an excellent bed for the skin graft. Furthermore, because of its width, it allows for covering an area of skin loss 5 X 7 cm in size in areas that are difficult to cover by other reconstructive means. The arch of rotation of this flap allows for coverage of the lateromedial and posterior surfaces of the ankle with no functional loss at the donor site. The relative ease of elevating this flap presents a reasonable justification for its wider application as a single local procedure for skin problems around the ankle.

Adult↗
PubMed1984

Nocturnal prolactin secretion in carpal tunnel syndrome.

The correlation between plasma PRL levels and CTS was investigated in 21 patients in whom a specific causal agent of CTS could not be identified. No correlation between plasma PRL levels and other clinical and neurophysiological data was detected.

Adult↗
PubMed1984

Elastase-type activity, elastase inhibitory capacity, lipids and lipoproteins in the sera of patients with ischemic vascular disease.

Elastase-type activity and elastase inhibitory capacity were determined in the sera of 130 atherosclerotic patients, suffering from ischemic vascular disease (IVD) localized at various sites, and of 60 control subjects. The concentrations of serum lipoprotein constituents (triglycerides, total cholesterol, HDL cholesterol, apo-A, apo-B) have also been investigated. HDL cholesterol and apo-A levels were decreased at every site on IVD. Plasma HDL concentration in men was lower than that in women. There was a sex-related difference in the elastase-type activity of the sera: within every atherosclerotic group, elastase-type activity in women was significantly higher than in men. Elastase-type activity did not appear to vary with age and did not show any correlation with the concentration of serum lipoprotein constituents. Pancreatic elastase inhibitory capacity of sera was significantly elevated in the sera of atherosclerotic patients. There was a significant negative correlation between the inhibitory capacity and the HDL cholesterol and apo-A content of sera, respectively. Inhibitory capacity did not show sex-, or age-related variation. There was a significant positive correlation between elastase-type activity and elastase inhibitory capacity measured in control sera. In the sera of atherosclerotic patients this correlation could not be established.

Adult↗
PubMed1983

Sarcoidosis of the hand--report of two cases.

Sarcoidosis occurring as an isolated manifestation in the hand can pose a diagnostic problem. Skin, muscle, tendon sheath, and bone may be affected. The unusual clinical picture and operative findings are often misleading and malignancy may be suspected. Two cases of isolated involvement of bone and muscle are described.

Amputation, Surgical↗
PubMed1983

The blood flow of rabbits' tendons. Variation with age, activity and hypoxia.

The Xenon133 washout technique was used to measure the blood-flow rate in flexor tendons of rabbits in different conditions. No variation was found with age. On the other hand, activity caused by electrical stimulation of the muscle increased the flow rate in the tendon significantly, confirming that the tendon is a metabolically active structure. Ligation of the vessels to the tendons failed to achieve a decrease of the blood flow rate. This was probably due to a rapid revascularization or biochemical modification of the tissue.

Aging↗
PubMed1981

Diagnosis of brachial plexus traction lesions by sensory nerve action potentials and somatosensory evoked potentials.

Forty-two patients with unilateral brachial plexus traction lesions were investigated by recording sensory nerve action potentials (SNAPs) from the lower arm and somatosensory evoked potentials (SEPs) from the clavicle, the cervical spine and the scalp overlying the contralateral somatosensory cortex, in response to electrical stimulation of peripheral nerves. The median and radial nerves were assumed to derive principally from the C6 and C7 roots, and the ulnar nerve from the C8 and T1 roots. Combination of SEP and SNAP findings suggested a location for the lesion (preganglionic, postganglionic or combining pre-and postganglionic elements) which was found to be accurate in 10 out of 16 operated cases, and substantially accurate in another 3. There was a poor correlation, however, between the presence of absence of SNAPs in the musculocutaneous nerve and the location of the lesion to the C5 root.

Action Potentials↗
PubMed1980

The role of somatosensory evoked potentials and nerve conduction studies in the surgical management of brachial plexus injuries.

In 15 patients who underwent open exploration of the brachial plexus, the somatosensory evoked potentials and nerve action potentials recorded at the time of operation were useful as guides to the most appropriate surgical procedure, and also in predicting the outcome in certain lesions. In three patients the apparent normality of the upper trunk of the plexus was concealing a more proximal lesion which was irrecoverable. The presence of a somatosensory evoked potential showed functional continuity in three patients in whom the C7 root was clinically involved and who recovered after operation. In five patients proximal stumps of ruptured C5 roots showed functional central continuity; this indicated their suitability for grafting. These patients recovered except one who suffered from co-existing disease. The electrophysiological studies also confirmed the clinical diagnosis of avulsion of the C8 and T1 roots and therefore prevented unnecessary dissection.

Action Potentials↗