Complications in surgical treatment of varicose veins of the lower limbs and their prevention]

To prevent hemorrhage and hematomas in the bed of subcutaneously removed large saphenous vein after Babcock the authors somewhat modified tactically the order of manipulations during the operative procedure. This method was employed while operating 42 patients with primary and secondary venous varices. It was feasible to prevent hemorrhage and hematomas along the vascular bed in every case. The suggested tactical modification of the removal of venous varices wound improve the postoperative course and shorten the terms of patients' stay at the hospital postoperatively.     

Use of autohemotransfusion in lung cancer surgery

The authors report their experience with over 100 operations, using autohemotransfusions in patients with malignant pulmonary neoplasms. Autohemotransfusion was performed after the modern technic now employed. 3-7 days before the operation exfusion of 250-450 ml of blood was made. During 10 days after exfusion patients were given hemostimulating therapy. Autohemotransfusion was employed during the operative procedure. Before the exfusion, pre- and postoperatively at the 1st-5th-10th day and before patient's discharge a parallel determination of CBV, CPV, HV, circulating protein volume and clinical analysis of blood, blood bilirubin, residual nitrogen in blood, urine analysis were made. Based on the data obtained and literature survey the use of autohemotransfusion in most planned operative interventions is believed by the authors to be rational.     

The characteristics of the contact area of an endoprosthesis made from Ostek graphite-based material and of the mandibular bone fragment

Interactions between endoprostheses made of carbonic composition "Ostec" and bone tissue were studied after plastic repair of experimental vast defects in the mandible in 22 rabbits and 10 dogs over the course of 2 years. Histologic findings showed the formation of a layer of fibrous connective tissue 3 months after the operation and later; at some places the implant directly joins the rabbit bone, which frequently undergoes chondroid transformation. Microscopically, the structure of "Ostec" represents carbonic threads forming large bundles. By the 6th and 12th months of experiment connective tissue elements penetrate the fissures between the bundles and the perforation gaps of the endoprosthesis, forming bone-like and bone structures in them.     

Disorders of the processes of protein biosynthesis and a decrease in the content of cytochromes P-450 and b5 in the microsomal fraction of rat kidney in the dynamics of development of acute pyelonephritis

Out of 970 carotid endarterectomies (CE) performed for high-grade (> 80%) stenosis of the internal carotid artery (ICA) until 1995, 147 patients with neurological non side-related symptoms (NSRS) and without any cardiac, ocular or vestibular significant pathology have been evaluated, analyzing the medium and long-term functional results (mean follow-up 37.6 months) related to the morphological status of the ICA contralateral and the vertebral arteries. NSRS disappeared in 126 pts (85.71%): contralateral ICA was non-stenotic in 32 cases (25.39%), stenotic < 75% in 68 cases (53.96%), stenotic > 75% in 7 cases (5.55%) and occluded in 19 cases (15.09%); vertebral arteries were pathological in only 6 cases (4.75%), among which 4 were on the same side and 2 on the opposite side of CE. NSRS persisted in 20 pts (13.6%): contralateral ICA was non-stenotic in 5 cases (25%), with a stenosis < 75% in 11 cases (55%) and with stenosis > 75% in 4 cases (20%); vertebral obliterative lesions were 3 (15.78%), among which 1 on the same and 2 on the opposite side of CE. No one statistical comparison among the groups of cases obtained on the ground of the status of ICA and vertebral arteries were significant (p always > 0.05 at chi-square analysis). Authors' data confirmed that high grade stenoses of ICA can cause NSRS and that CE--always performed at the aim to prevent major neurological attacks--can relieve also these functional disorders in the most of cases, independently from the status of the contralateral ICA and the vertebral arteries.     

Aging of titania hydrosols prepared via ultrasonic processing

We have studied the effect of aging conditions on the properties of titania hydrosols produced via ultrasonic processing and containing aggregates of 5-nm-diameter amorphous particles. The results demonstrate that, at room-temperature, 0.44 M to 0.11 M hydrosols are stable for 3 to 22 days. During aging for 40 to 45 days, the properties of 0.01 M to 0.0025 M hydrosols remain unchanged. Aging for a longer time causes the amorphous particles to crystallize in the anatase structure. Raising the temperature to 75°C reduces the induction time to 3–4 h.     

Changes in biochemical parameters of erythrocytes in workers engaged in pyromellitic dianhydride production

When health plans say no, most patients back off. Only a few states guarantee independent reviews for treatment denials, but politicians and activists want to change that. The right to redress is the flash point of a larger movement to mandate consumer rights under managed care.