Biomedical subjects
Publications and source records attributed to A Sagi.
We report a rare case of peritonitis caused by perforation of smooth muscle tumor of the jejunum. In spite of having all the reported presenting symptoms of these tumors, the diagnosis was not made preoperatively. Although histopathologically diagnosis was that of a benign tumor, the subsequent course was rapid and malignant. A complete review of the literature is presented.
Our experience with infrequent and unfamiliar types of injury caused by various compounds of bromine are described and discussed. While bromine containing compounds share some of the characteristics of other common causes of chemical burns, they also have a specific, exclusive mode of affecting the skin. The delay in the appearance of clinical signs and symptoms is an important factor to be considered by those who treat injuries caused by bromine or some of its compounds, or by those who may be the first to see persons who are injured by these agents. As most of the injuries occur at work (92 per cent) it is in these industrial premises that considerable stress should be made of the importance of wearing protective clothing in order to reduce local damage and prevent systemic effects. Prompt first aid, by thorough washing with large volumes of water reduces the extent and depth of the injury.
A rare case of high-pressure injection injury to the thumb with water is reported. The problem was managed without surgical exploration despite subsequent involvement of the small finger.
This experimental study in the chicken model compares the results of sheath closure during primary tendon surgery. Sheath closure after tendon grafting was accomplished by trapdoor of the original sheath, vein patch, and vein conduit. After casting in flexion for 14 days, the operated foot and digits were taken through a full passive range of motion every 3 days. At the 28th postoperative day, all immobilization was removed and free active range of motion and daily perching began. Active flexion was measured after death by continuous traction on the proximal profundus tendon: simulated active flexion. The unoperated contralateral foot served as the control. All operated middle toes achieved significantly greater functional return when the sheath was restored either with trap-door closure, vein conduit, or vein patch compared with simple excision of the sheath. The results indicate the efficacy of sheath closure as well as the possibility of utilizing vein patches or conduits during primary tendon repair.
A simple, inexpensive aid for nipple-areola site determination is the disposable electrocardiographic electrode. Patients participate in positioning of the future nipple-areola complex, and accurate localization can be checked even when the breast is covered with a brassiere.
A chemically treated bovine skin, Dermodress, is presented as a long-term skin substitute. Dermodress was applied over denuded surfaces of debrided deep burns and was kept in place for up to 56 days. Dermodress adheres to all contours of the debrided surfaces, has hemostatic effect and does not present any signs of infection or rejection. Dermodress can be removed in stages according to the availability of autografts, which may be applied immediately, since the exposed areas are clean and suitable for immediate grafting. Our clinical experience shows that Dermodress has most of the required properties of a long-term temporary skin substitute.
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A cutaneous horn (Cornu Cutaneum) is a relatively rare tumour, most often arising on sun-exposed skin in elderly men, usually after the Vth decade. The tumor is often conical, consisting of marked retention of stratum corneum. This lesion can be caused by many primary underlying processes that may be benign, premalignant or malignant, thus the importance of accurate determination of the nature of the conditions at the base of the lesion. Surgery is the treatment of choice. We describe an illustrative case with cutaneous horn of the forearm. We also review various known causes of cutaneous horn and the pertinent literature.
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Platelet functions were evaluated in 20 healthy pregnant women in the last months of pregnancy, during labor, and 5-12 weeks after labor. The results showed an increased platelet count, bleeding time and nitroblue tetrazolium (NBT) test, as well as an increased plasma calcium level postlabor. ADP- and epinephrine-induced aggregation during labor was markedly decreased, followed by a statistically significant increase postlabor. These findings are in correlation with the high incidence of thromboembolic phenomena occurring postlabor.
Most studies investigating the Stroop phenomenon have used duration of performance as a measure to demonstrate the interference effects. In the present study the Stroop phenomenon was examined by means of a recall test. Sixty male and female undergraduates, randomly assigned into one of three experimental conditions, were included in the study. The three conditions consisted of lists of six colored Xs, six colored words, and six color names printed in incongruent colors. The task was to recall the items in each list. Color names were recalled better than and at the expense of printed colors. These findings support the Norman and Bobrow notion regarding the limited amount of processing resources.
96 7- and 9-yr.-olds were under four experimental conditions. A "distinctive label" group (n = 24) associated four different gender-cued labels with four infants' faces. An "equivalent label" group (m = 24) associated only two of these labels. There were also two no-label groups (ns = 24), "differential perception" and "perception." In the former, perceptual cues were provided; no cues were provided in the latter. The main measure was a test of perception. 9-yr.-olds were not affected by the labels, 7-yr.-olds were but more significantly so during initial trials. It is proposed that perception is affected by labels, learning, and selective attention. These effects are determined developmentally. As age increases the effects of verbal cues diminish and of perceptual cues increase. The findings are related to cross-cultural data, indicating that Israeli toddlers classify according to gender earlier than do American children. This is probably because Hebrew more than English contains distinctive linguistic cues related to sex.
A case of a 3-year-old boy with anal stricture and megarectum is described. Overflow incontinence and soiling were corrected by local flaps and skin graft and were maintained by frequent dilatations after downward traction of the whole anus was performed. The options of immediate and late treatment of such burns and the colostomy procedure are discussed.
Patients who have sustained thermal injuries may require tracheostomies as a result of facial burns; these operations may also be required after prolonged intubation for smoke inhalation injury or respiratory failure. For a patient with a temporary tracheostomy, speech may be achieved by occluding the opening of the tracheostomy cannula with the tip of a finger, thereby directing airflow through the vocal cords and allowing phonation to be produced. However, some patients who also have hand burns may not be able to cover the opening of the tube because of the injuries to their fingers and the bulky dressings covering them. A simple tracheal occluder can be made out of a ping-pong ball and a syringe casing. The device presented in this article allows for the restoration of speech in the types of patients described above, and it promotes purposeful movement of their upper extremities.