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Should the pericardium be closed routinely after heart operations?

BACKGROUND: Repeat coronary artery bypass grafting is more difficult if the right ventricle is firmly attached to the inner table of the sternum. Closure of the pericardium at the time of the initial procedure may prevent attachment of the right ventricle to the sternum. This study attempts to identify the geometric effects of pericardial closure early after isolated coronary artery bypass grafting. METHODS: Forty-two patients undergoing elective, isolated coronary artery bypass grafting were randomized into two groups: 20 patients underwent closure of the pericardium (Closure group) and the pericardium was left open in 22 patients (Open group). Radiopaque markers were attached to the anterior aspect of the right ventricular epicardium in both groups. RESULTS: Postoperative chest roentgenograms revealed that the distance between the epicardial surface and the posterior table of the sternum was larger in the Closure group compared to the Open group at 1 week and 3 months postoperatively (p < 0.001). Cardiac index and stroke work index in the early postoperative period was lower in the Closure group compared to the Open group (p < 0.001) despite similar filling pressures. CONCLUSIONS: Pericardial closure may reduce the risk of myocardial injury during sternotomy for repeat coronary artery bypass grafting by preventing right ventricular adhesions. However, adverse hemodynamic effects in the early postoperative period may preclude pericardial closure in patients with impaired ventricular function.

Aged↗

Measurement of irradiated small bowel volume in pelvic irradiation and the effect of a bellyboard.

From June 1992 to January 1993, 51 consecutive patients with pelvic cancers treated with radiotherapy alone, or surgery plus post-operative radiotherapy, were included in a study of the effectiveness of a false table-top (bellyboard) in displacing small bowel loops out of anteriorposterior (AP) and posterioranterior (PA) opposing pelvic fields. The small bowel was opacified with barium. The volume of small bowel within the radiotherapy fields in the prone position with a bellyboard was reduced by 134-300 ml (29%-61%) when compared with that in supine position, and by 136-216 ml (28%-50%) when compared with that in prone position without a bellyboard, depending on the type of previous surgical procedures. The differences were highly statistically significant and likely to be clinically significant. The bellyboard we used is simple, economical, convenient and well tolerated. Its use is recommended, especially when AP and PA pelvic fields are used.

Adult↗

Is it necessary to use a drain after harvesting radial artery? A randomized prospective study.

BACKGROUND: Radial artery (RA) is a second choice after internal thoracic artery in coronary artery bypass operations. There are some complications in forearm after harvesting RA. We have prospectively compared the necessity of inserting drain in the forearm cavity after RA harvesting to prevent such complications. METHODS: Eighty consecutive patients (younger than 65 years old, left ventricle ejection fraction >40%) undergoing coronary artery bypass operations were prospectively enrolled into study. Patients were divided into two groups by using, Table of Random Digit, for randomization. In group I patients (n = 40), we inserted drain during the forearm closing and in group II patients (n = 40), we did not use any drain. Patients in both groups evaluated for wound site complications such as hematoma, errythema, vascular complications, motor deficit, paresthesia, hand edema, and infection. RESULTS: We found two hand edemas, one hematoma, five paresthesias, one infection, and three ecchymosis in Group I patients and one hematoma, four paresthesias, one infection, and four ecchymosis in Group II patients. There was no statistically significant difference between the groups in complications. CONCLUSION: Placing of a drain into the forearm has not significant advantages but the cost and the complaints of patients could be reduced by not using the drain.

Coronary Artery Bypass↗

Anesthesia management for spine surgery using spinal navigation in combination with computed tomography.

The development of a spine surgery using neuronavigation with intraoperative computed tomography (CT) is of benefit to the patient. However, the procedure also has a major impact on anesthesia management. During the procedure, the patient remains in the prone position on the CT examination table and is moved extensively during CT scans. Furthermore, there is inadequate separation between operating field and anesthetic area. Problems encountered during the procedure were patient positioning, limited patient access, long tubing, and therefore the need for adequate monitoring. We report our experience using this approach in 35 patients with spinal fracture, spinal degeneration, and tumor and describe a step-by-step anesthetic management protocol that has been developed as a guideline for use in spinal neuronavigation with intraoperative CT at our center.

Adolescent↗

Limitations of the 1990 American College of Rheumatology classification criteria in the diagnosis of vasculitis.

BACKGROUND: The American College of Rheumatology (ACR) established criteria to discriminate among patients with seven types of vasculitis. Although designated as "classification criteria" for research, these criteria are often used for diagnosis. OBJECTIVE: To examine the operating characteristics of the 1990 ACR classification criteria in the diagnosis of Wegener granulomatosis, giant-cell arteritis, polyarteritis nodosa, and hypersensitivity vasculitis. DESIGN: Prospective cohort study. SETTING: University medical center and Veterans Affairs medical center. PATIENTS: 198 consecutive patients referred to rheumatologists for evaluation of possible vasculitis. MEASUREMENTS: Blinded chart audits were done to classify patients according to the 1990 ACR classification criteria for Wegener granulomatosis, polyarteritis nodosa, giant-cell arteritis, and hypersensitivity vasculitis on the basis of the patients' initial presentation. Chart audits done 2 to 8 months after baseline provided the patients' final diagnoses, which were considered the gold standard, as in the development of the ACR criteria. Test operating characteristics of the ACR classification criteria were calculated according to 2 x 2 tables for the entire cohort and for only the patients with a final diagnosis of vasculitis. RESULTS: Vasculitis was diagnosed in 51 (26%) patients. Thirty-eight (75%) of 51 patients with vasculitis and 31 (21%) of 147 patients without vasculitis met ACR criteria for one or more types of vasculitis. The positive predictive values for the four vasculitides according to ACR criteria were 17% to 29% for the entire cohort and 29% to 75% for only the patients with a final diagnosis of vasculitis. CONCLUSION: The 1990 ACR classification criteria function poorly in the diagnosis of specific vasculitides.

Diagnosis, Differential↗

[Methods of determination of the mammary gland volume, its resectable part and their applied significance in organ-preserving surgeries].

The main aim of the investigation was to work out accessible techniques of calculation of the parameters of the mammary gland (MG) necessary for the surgeons performing organ-preserving operations. Given one parameter only--the arch size of the MG--and using the table of standard parameters of the MG, one can determine the MG volume, the volume of the dissected tissues and the necessary sizes of the myotransplant.

Breast↗

Intraabdominal paraanastomotic aneurysms after aortic bypass grafting.

Although the reported incidence of intraabdominal paraanastomotic aneurysms after abdominal aortic bypass grafting ranges from 1% to 15%, the true incidence is unknown because few studies have used routine, serial radiographic or sonographic imaging studies. Since July 1, 1988, we have used yearly abdominal sonography examinations to monitor our patients with aortic grafts. In the first 33 months we studied 138 patients. Medical records of 111 of these were available for review and form the basis of this report. Eleven patients (10%) were found to have intraabdominal paraanastomotic aneurysms ranging in overall size from 4.1 to 6.2 cm (mean, 5.0 +/- 0.7 cm). The mean time between operation and detection of an aneurysm was 144 +/- 101 months (range, 8 to 336 months). Three paraanastomotic aneurysms occurred within 3 years of operation, and the remaining eight occurred late (7 to 28 years). By life-table analysis, the incidence of paraanastomotic aneurysms was 27% at 15 years. Paraanastomotic aneurysms were classified as either pseudoaneurysms (presumed disruption of the anastomotic suture line, n = 7) or as true aneurysms (widening of the adjacent aorta, n = 4). True aneurysms occurred only after repair of an abdominal aortic aneurysm, whereas pseudoaneurysms were more frequent after bypass for occlusive disease. The finding of paraanastomotic aneurysms in 10% of our patients supports the use of yearly sonography for routine follow-up after aortic grafting.

Aged↗

Differential origin and control mechanisms in small and large bovine luteal cells.

Studies of the calcium requirement and the relationship of intracellular calcium to progesterone synthesis in highly purified preparations of bovine luteal cells reveal a remarkably close relationship between intracellular calcium levels and steroidogenesis. The differential responses of the two cell types, summarized in Table 2, are beginning to reveal how the two cell types may co-operate to produce both luteotrophic and luteolytic responses at different stages of the oestrous cycle and early pregnancy. The luteotrophic mechanisms in the small cells are fairly clear; in addition to the luteotrophic effects of LH and cAMP, activation of protein kinase C leads to increased progesterone synthesis. Accordingly, PGF-2 alpha and several other prostanoids are luteotrophic in these cells. PGF-2 alpha stimulates phospholipase C activity in the small cells but does not reduce LH-stimulated cAMP or progesterone accumulation (Davis et al., 1989). This acute stimulus of protein kinase C activation to progesterone production in bovine small luteal cells is rapidly desensitized, although its stimulus to prostanoid production continues for at least 24 h. Large cells respond to LH, but only at relatively high levels. In addition, we have no good evidence for a role for protein kinase C in the control of progesterone synthesis in the large bovine luteal cells from mid-cycle corpora lutea. Phorbol esters have no effect on steroidogenesis and it is not yet established that protein kinase C provides the same high affinity receptor for phorbol esters that is found in the small cells. Experiments with inhibitors of protein kinase C, such as staurosporine, in large cells have been inconclusive. Evidence for several species suggests that both cell types co-operate, in ways not yet fully understood, to bring about maximal progesterone production at mid-cycle. Some evidence suggests that they may also co-operate to bring about luteolysis. The concept that PGF-2 alpha initiates luteolysis by inhibiting LH stimulated progesterone production in the large cells must be revised in light of the relative insensitivity of these cells to LH and the fact that they probably constitutively express the cholesterol side-chain cleavage enzymes (P-450scc) that represent the rate-limiting step in progesterone production. Oonk et al. (1989) have reported that, once P-450scc mRNA is induced in rat granulosa cells by the LH surge, it is constitutively maintained by the luteinized cells in the absence of gonadotrophins and is no longer regulated by cAMP.(ABSTRACT TRUNCATED AT 400 WORDS)

Animals↗

Hill antireflux operation.

There are multiple published reports of the efficacy of the Hill procedure in controlling problems with primary reflux, recurrent hiatal hernias, and failed previous operations, and in patients with reflux complicated by peptic esophageal stricture. There also are more recent reports demonstrating its applicability in laparoscopic antireflux operations. Currently, the longest follow-up study for patients undergoing antireflux surgery originated at the Virginia Mason Medical Center and was published in 1988. This review followed 167 patients for a minimum of 15 to 20 years (mean 17.8 years) following their Hill operations. This study demonstrated the durability of the Hill antireflux operation in that more than 85% of patients were still completely satisfied with their postoperative results 15 to 20 years following the operation. In 1993 the author and colleagues carried out a quality-of-life analysis 1 year following standard open antireflux surgery in 60 patients operated on between April 1991 and November 1992. Forty-nine of these patients underwent primary operations, whereas 11 (18%) were undergoing repeat operations. A prospective modified Visick-type classification as proposed by Dr. Pope was used and all patients were asked to prospectively rate their quality of life on a standard scale (from 0 = worst to 10 = best) preoperatively and then 1 year following operation. It was found that symptom scores on the modified Visick scale improved dramatically (Table 1) and that patients' individual perceptions of their quality of life were equally dramatically improved (see Table 1). We have found the Hill procedure to be highly effective, safe therapy for primary, recurrent, and complicated antireflux problems. The repair is durable in the long-term, and it can be applied laparoscopically. We have made some minor changes in surgical technique to make the procedure easier to understand and apply by all surgeons interested in treating patients with antireflux disease.

Esophagus↗

[Pharmacologic prevention of postoperative cystitis].

For prevention of postoperative cystitis the authors tested currently used drugs which influence the adherence of bacteria to the urothelium, nitrofurantoin (FurantoinR), 3 x 1 tabl. per day and trimetroprim with clotrimoxazole (BiseptolR), one tablet in the evening before operation. They found that Furantoin reduced the frequency of the inflammation in patients subjected to abdominal operations from 12.3% in the control group to 2.3% and in those subjected to vaginal operations from 46.1% to 9.6%. The disadvantage of the drug is that it must be taken every day and that it is poorly tolerated by the patients. Biseptol is excreted more slowly and therefore 1 tablet before operation blocks the development for a maximum of 48 hours. In patients with abdominal operations the frequency of inflammation was similarly as in controls, 12%, in patients with vaginal operations the number of inflammations declined to 24.5%. Biseptol, 1 tablet before operation, is suitable only in patients where it is not assumed that the catheter will be inserted for a prolonged period.

Cystitis↗

[Phonosurgery of chronic vocal cord edema].

INTRODUCTION: Chronic (Reinke's) oedema of the vocal folds is a frequent and declicate objective of phonosurgery. It is characterized by a marked bilateral subepithelial oedema, which develops by degrees, as a non-specific reaction of the vocal folds to various irritative noxious agents (especially smoking), in patients with some predisposition. It is found, by the light and electron microscopes and immunohistochemistry, that oedema is characterized by subepithelial fissure-like spaces, which accumulate a protein-rich fluid, and develops like neobursae. Therefore, mechanical factors and functional influences may also contribute to the development of Reinke's oedema. The voice is low pitched and with various degrees of hoarseness. Reinke's oedema alters the mechanical properties of the cover, which becomes very pliable and with reduced stiffness, incapacitating the vocal fold for production of high tones. Hoarseness is induced in subject with associated laryngitis, or disbalance in mechanical properties of the vocal folds. Hyperkinetic pattern of voice production can often be seen in patients with Reinke's oedema, which is a compensatory results of reduced functional capability of the vocal folds. Stroboscopy reveals a prolonged closed phase of the vibratory cycles and strikingly marked mucosal waves. MATERIAL AND METHOD: A series of 371 patients with Reinke's oedema was operated by direct microlaryngoscopy, under the general anaesthesia. The "excessive" mucosa was removed by bimanual micro-procedure, while the care was not taken to severe layers deeper than a superficial part of the intermediate layer of the vocal fold (Reinke's space). In this procedure we used the micro-forceps and scissors, to detach oedema parallel to the free edge of the vocal fold, at its upper and lower demarcation lines, beginning from the posterior part of oedema. Another 27 patients were operated by indirect procedures. Microstroboscopy (IMS) was used in subjects, while videostroboscopy (IVS) was carried out in another 18 patients. These procedures were used when general anaesthesia was contraindicated, and in patients with Reinke's oedema of the first degree (initial oedema). In these patients only a mucosal strip was removed from the upper surface of the vocal fold, apart from the free edge. Oedema was removed bilaterally, while the formation of the postoperative web was prevented by regular examinations of the patient. In several cases of adherence between the two folds in their anterior commissure, the problem was solved indirectly by the use of a curved forceps and under the topical anaesthesia. Postoperative voice rest and administration of steroids were mandatory. Surgical and functional results were followed-up by stroboscopy over the period of at least three years after surgery. The majority of patients were additionally treated by the voice therapy, while the decision about its use was made three weeks after surgery. RESULTS: Functional results of our therapeutic strategy were satisfactory in our series of 398 subjects with Reinke's oedema. In comparison with other benign lesions of the vocal folds, it was more time-consuming and required a more frequent use of the postoperative voice therapy (Table 1). Thus, we have not encountered recurrences. DISCUSSION: During the last 10 years we operated on 1550 patients with various benign lesions of the vocal folds, including 398 subjects with Reinke's oedema (25.7%). Excision of the "excessive" mucosa may appear today as a procedure which is too radical if compared with many techniques which have been offered during the last decades: conservative excision and suction, squeezing technique, laser. Nevertheless, the histological structure of Reinke's oedema, with subepithelial fissure-like spaces indicated that the latter procedures can hardly be expected to prevent recurrences. It was found that the use of laser was not favourable in this area for its deteriorative local effect.

Chronic Disease↗

Is cervical spondylosis an occupational hazard for urologists?

Amongst 248 urologists who spend a substantial amount of their operative work performing endoscopic procedures and who were surveyed with reference to symptoms of cervical spondylosis, 118 admitted that they were, or had been, troubled by such symptoms (47.6%). A control group of 113 General Practitioners matched for age at qualification had no significantly fewer symptoms (43.4%). Similar numbers in each group had a history of neck injury, often of a sporting nature, and also had similar incidences of symptoms including pain down the arm. Significantly more urologists have current severe symptoms and more frequent attacks of trouble. Urologists offered a variety of advice on how to ameliorate these symptoms, which included attention to posture, the need for self-controlled motorised endoscopic tables, an endoscopic stool with wheels and the limitation of the number of transurethral prostatectomies per operating list.

Adult↗

Comparison of the value of emergency mesenteric angiography and intraoperative colonoscopy with antegrade colonic irrigation in massive rectal haemorrhage.

The investigation of massive rectal haemorrhage has routinely included emergency mesenteric angiography to identify the site of bleeding in preparation for surgery. Nine cases over 18 months were identified from the angiography register and reviewed retrospectively. Angiography demonstrated the bleeding point in only one case, rendering colonoscopy unnecessary. However, that patient became shocked, requiring six units of blood during angiography. A second patient suffered cardiac arrest during angiography. The mean time taken was 1 1/2 h constituting a considerable delay before proceeding to surgery. On-table colonoscopy with antegrade lavage showed the bleeding site in seven out of nine cases and the mean time for operation was 3 h. One patient stopped bleeding spontaneously and there was one postoperative death from an unrelated cause. We conclude that there is no place for emergency mesenteric angiography in massive acute large bowel haemorrhage and that early surgery with antegrade colonic lavage and on-table colonoscopy is the treatment of choice.

Acute Disease↗

Osteoma of the inner table of the skull--CT diagnosis.

AIM: The purpose of this study was to ascertain CT criteria for the differentiation of osteoma of the internal table of the skull (OIT) from meningioma. MATERIAL AND METHODS: Thirty-eight patients with proven OIT by operation or by post-mortem examination and 100 patients with proven meningioma were studied. RESULTS: Unenhanced computed tomography (UCT) and enhanced CT (ECT) was performed in each case and images on brain and bone window settings were evaluated. Measurements were taken of the widest and narrowest diameters of the OIT on the bone window images. The OIT appeared as an ivory-density, mushroom-like mass with well-defined borders attached to the inner table of the skull by a bony stalk or neck. The ratio between the widest diameter of the mass and the narrowest area of the stalk or neck ranged from 1.6 to 6. The CT features of 100 meningiomas were not consistent with OIT, using the following parameters: contrast enhancement, surrounding vasogenic oedema, dural lucent line, osteolytic bone lesion and cystic component. Hard meningiomas without contrast enhancement did not present with a bony stalk or neck. No meningioma had the CT features of OIT, and no OIT had the CT features of meningioma. No patient operated on for OIT showed any clinical improvement following surgery. CONCLUSIONS: Computed tomography examination can be sufficient for the diagnosis of OIT and may therefore prevent unnecessary surgery.Avrahami, E., Even, I. (2000). Clinical Radiology55, 435-438.

Aged↗

Evaluating factors that influence hand-arm stress while operating an electric screwdriver.

The objective of this study is to evaluate the factors contributing toward hand-arm stress while operating an electric screwdriver. Hand-arm stress was investigated in terms of individual finger force exertion, flexor digitorum EMG, and hand-transmitted vibration. Two activation modes (push and push plus trigger (P + T)), two preset shut-off torque levels (low and high) and three horizontal operating distances (far, middle, and near) were evaluated. Thirteen healthy male subjects drove screws into a horizontally mounted iron plate with pre-tapped screw holes using an in-line electric screwdriver in randomly ordered experimental combinations. The results indicate that using push-to-start mode at low torque level was better than the other combinations of activation mode x torque because it resulted in less hand-arm stress. In addition, the far distance level (33-45 cm away from the work table edge) caused greater stress than the middle and near distances, and hence is best avoided. While operating an in-line electrical screwdriver, the force contribution of the small finger was greatest, followed by the ring finger. The average force contributions of the index, middle, ring, and small fingers were 19, 25, 27, and 30%, respectively, while operating with push-to-start mode.

Adult↗

Screening for depression in pregnancy: characteristics of the Beck Depression Inventory.

OBJECTIVE: To determine the test characteristics of a self-report questionnaire, the Beck Depression Inventory, when used as a screening test for depression in a population of ambulatory pregnant women. METHODS: One hundred five pregnant women completed the Beck Depression Inventory and underwent a structured interview using the National Institute of Mental Health Diagnostic Interview Schedule-version III. Current depression was diagnosed according to the criteria of the Diagnostic and Statistical Manual of Mental Disorders-III-R. A receiver operating characteristic curve was constructed for the Beck Depression Inventory score as a predictor of current depression. A table of sensitivities, specificities, predictive values, and likelihood ratios was created for various cutoff values. RESULTS: For the 105 women enrolled, the median Beck Depression Inventory score was 8.0. Twelve women (11%) were diagnosed with current depression and had a median Beck Depression Inventory score of 25.5, compared with those without current depression, who had a median score of 8.0 (P = .001). The area under the receiver operating characteristic curve was 0.9940. Using a cutoff range of greater than 16, the sensitivity of the Beck Depression Inventory to detect current depression was 0.83, the specificity was 0.89, the positive predictive value was 0.50, and the negative predictive value was 0.98. CONCLUSIONS: The Beck Depression Inventory can serve as a rapid screening test for depression during pregnancy. A higher cutoff value is required for pregnant women than is customarily used outside of pregnancy.

Adult↗

Risk adjustment for evaluating the outcome of urological operative procedures.

PURPOSE: Considerable public and media attention has been directed in recent years toward comparing performance at individual hospitals. So-called death league tables have been published in the media, ranking hospitals according to crude mortality rates. Crude rates of mortality and morbidity are clearly misleading. Therefore, scoring systems comparing treatment outcomes among physicians or hospitals on an objective basis are urgently required. MATERIALS AND METHODS: During a 12-month period we prospectively evaluated 651 patients at 2 urological units using a simple and well validated surgical scoring system. Patients had been admitted to the units for routine urological operations. The scoring system consists of a simple preoperative physiological score, a postoperative severity score and defined types of complications. RESULTS: The morbidity and mortality rates for unit 1 were 7.4% and 1.3%, respectively. For unit 2 the morbidity and mortality rates were 14% and 8.8%, respectively. Despite the marked differences in these crude rates risk adjusted analysis revealed no significant difference (p <0.05). Receiver operating characteristics curve analysis likewise demonstrated no significant difference in mortality and morbidity for the 2 units. CONCLUSIONS: Raw rates of mortality and morbidity are often inappropriately used to compare the performance of various surgical procedures, especially vascular and cardiothoracic surgery. In Great Britain at some institutions urological units are ranked according to mortality and morbidity outcome. As a consequence, important variables, such as patient physiological state at surgery and the type of procedure, are not considered. Our study shows that the scoring system applied is suitable for urological audit and may be a valuable tool for comparing performance at various units.

Female↗

Predictors of operative mortality and cardiopulmonary morbidity in the National Emphysema Treatment Trial.

OBJECTIVE: We sought to identify predictors of operative mortality, pulmonary morbidity, and cardiovascular morbidity after lung volume reduction surgery. METHODS: Univariate and multivariate logistic regression analyses were performed. Candidate predictors included demographic characteristics, physical condition characteristics, pulmonary function measures, measures of the distribution of emphysema as determined by radiologists and by means of computerized analysis of chest computed tomographic scans, and measures of exercise capacity, dyspnea, and quality of life. End points analyzed were operative mortality (death within 90 days of the operation), major pulmonary morbidities (tracheostomy, failure to wean, reintubation, pneumonia, and ventilator for > or =3 days), and cardiovascular morbidities (infarction, pulmonary embolus, or arrhythmia requiring treatment). RESULTS: Five hundred eleven patients in the non-high-risk group of the National Emphysema Treatment Trial underwent lung volume reduction. The incidence of operative mortality was 5.5%, major pulmonary morbidity occurred in 29.8% of patients, and cardiovascular morbidity occurred in 20.0% of patients. Predictors for these end points are as follows: [table: see text]. CONCLUSIONS: Although lung volume reduction can be performed in selected patients with acceptable mortality, the incidence of major cardiopulmonary morbidity remains high. The lone predictor for operative mortality of lung volume reduction was the presence of non-upper-lobe-predominant emphysema, as assessed by the radiologist. Pulmonary morbidity can be expected in elderly patients who have a low diffusing capacity for carbon monoxide and forced expiratory volume in 1 second. When assessing morbidity, the computer-assisted chest computed tomographic analysis proved useful only in predicting cardiovascular complications.

Aged↗