Search PubMed⌕ Search

Biomedical subjects

A Mayo

Publications and source records attributed to A Mayo.

At least 19 recordsLinked to original sources

Recombinant activated factor VII (NovoSeven): addition to replacement therapy in acute, uncontrolled and life-threatening bleeding.

BACKGROUND AND OBJECTIVES: Recombinant activated factor VII (rFVIIa, NovoSeven) has been used off-label for various conditions. A protocol for its use in acute, uncontrolled life-threatening bleeding, was devised and employed. A haematologist/transfusion specialist was assigned as a member of the team. MATERIALS AND METHODS: The clinical data were reviewed and summarized. A scoring system for the assessment and monitoring of coagulopathy was employed. Each parameter of prothrombin time (PT), activated partial thromboplastin time (aPTT), platelet number and fibrinogen level was allocated points according to the degree of abnormality. Three scoring levels emerged. RESULTS: Between April 2001 and April 2003, 13 patients received rFVIIa for acute, uncontrolled life-threatening bleeding. Nine of 13 patients remained alive for 15 days or longer after rFVIIa infusion. All patients who experienced a reduction or cessation of bleeding after rFVIIa infusion, also had a lower coagulopathy score after replacement therapy, prior to rFVIIa infusion, compared with their score at rFVIIa request. There was a reduction in the average use of blood products after rFVIIa infusion. The coagulopathy score was statistically predictive of response to rFVIIa and survival. CONCLUSIONS: In an area where very little data exists, we report the usefulness of rFVIIa. We propose that transfusion replacement should aim to correct coagulopathy before infusion of rFVIIa and that a haematologist/transfusion specialist should be involved in the management of these patients. A prognostically significant coagulopathy scoring system is offered.

Acute Disease↗

Terror bombing-mechanisms, consequences and implications.

Our objective in this review is to describe the unique features of bombing injury and to outline some special elements of their management. This is to allow the timely improvement and adjustment of existing mass casualty protocols. Forensic studies, detonation and explosion, mechanisms of injury in explosion and their bodily effects, chemical effects of the explosive, site of the explosion and the wounding potential, the Multidimensional Injury Pattern, diagnostic evaluation of Multidimensional Injury Pattern, and surgical and treatment dilemmas associated with it are described and discussed.

Blast Injuries↗

Transdermal testosterone application: pharmacokinetics and effects on pubertal status, short-term growth, and bone turnover.

The aim of the study was to assess the effect of transdermal testosterone on free testosterone concentrations in saliva and on short-term growth and bone turnover in boys with growth or pubertal delay. A prospective, randomized, crossover study was conducted over 26 wk with 4 wk of run-in, 8 wk of treatment I (8 or 12 h), 4 wk of washout, 8 wk of treatment II (8 or 12 h), and 4 wk of final washout. The main outcome measures were salivary testosterone profiles during the different study periods; weekly change in lower leg length (LLL) as measured by knemometry, i.e. LLL velocity; absolute and percentage change in bone alkaline phosphatase (bALP) levels; and deoxypyridinoline cross-links measured in urine. Eight boys who took part in the study had a median age of 13.5 yr (range, 12.4-14.9 yr), testicular volume of 3 ml (range, 2-6 ml), height SD score of -2.4 (range, -1.44 to -3.35), and bone age delay of 2 yr (range, 1-3.2 yr). Median salivary testosterone during 8- and 12-h treatments [179 pg/ml (range, 7-3579 pg/ml) and 150 pg/ml (range, 12-3472 pg/ml) (not significant)] was significantly higher than during the run-in and washout blocks (P < 0.0001) [9 pg/ml (range, <7 to 122 pg/ml) and 13 pg/ml (range, <7 to 285 pg/ml) (not significant)]. LLL velocity in the treatment blocks (median, 0.64 mm/wk; range, 0.1-1.08 mm/wk) was significantly higher than during the run-in and washout periods (median, 0.48 mm/wk; range, -0.06 to 0.92 mm/wk) (P < 0.001). The main rise in bALP occurred during the first treatment block with a median percentage change in bALP of 44.2% (range, -4 to 87%) and a smaller percentage change in bALP at the end of the second treatment block of 9.8% (range, -4 to 55%). The increases in bALP were not significantly different between the 8- and 12-h treatment periods, and there was no significant decline during the washout periods. Overnight transdermal testosterone application, as Virormone (5 mg), may be a potentially acceptable method of induction of puberty and stimulates short-term growth and bone turnover.

Administration, Cutaneous↗

Randomized, crossover comparison study of the short-term effect of oral testosterone undecanoate and intramuscular testosterone depot on linear growth and serum bone alkaline phosphatase.

AIM: To compare the effects of oral testosterone undecanoate (TU) 40 mg daily and intramuscular depot sustanon 50 (SUS), 4 weekly, on short-term growth and bone turnover. METHOD: Prospective, randomised, cross-over study over 26 weeks with 4 weeks of run-in, 8 weeks of treatment I (TU/SUS), 4 weeks of wash-out, 8 weeks of treatment II (SUS/TU) and 4 weeks of final wash-out. MAIN OUTCOME MEASURES: Weekly change in lower leg length (LLL) as measured by knemometry, i.e. LLL velocity (LLLV) and absolute bone alkaline phosphatase levels (bALP), as well as percentage change in bALP (%bALP). PATIENTS: Fourteen boys with delayed growth and puberty; two declined and one boy with sickle cell trait dropped out with priapism a week after SUS. The remainder had a median age of 14.3 years (range 12.5-17.4), testicular volume of 2 ml each (2-6), HtSDS of -2.1 (-3.3 to -1.0) and BA delay of 2.4 years (0.7-4.4). RESULTS: Median LLLV in the treatment blocks was 0.7 mm/wk (-0.27 to 2.2) and LLLV during the run-in and wash-out periods was 0.27 mm/wk (-0.3 to 0.6) (p <0.005). LLLV during treatment with TU and SUS was 0.51 mm/wk (-0.22 to 2.17) and 0.67 mm/wk (-0.27 to 2.2), respectively (NS). Median LLLV during the washout phases that followed the TU block and the SUS block was similar at 0.28 mm/wk (-0.1 to 0.6) and 0.3 mm/wk (-0.2 to 0.6), respectively. LLLV peaks and troughs that were related to the timing of the injection were more evident during SUS therapy. Median bALP during the run-in period was 94.2 U/l (16-282) and the median %bALP during this period was 1.2% (-57, 16). The main rise in bALP occurred during the treatment blocks with a %bALP of 19.3% (-28.8, 121.7) (p <0.005). Median bALP at the beginning and end of the SUS block was 99.7 U/l (51.7, 225) and 170 U/l (64.8, 273), respectively (p <0.05). Median bALP at the beginning and end of the TU block was 111 U/l (51, 287) and 127.6 U/l (66.4, 298) (NS). Median %bALP during SUS was higher than during TU at 28.1% (4.4, 121.7) and 11.8% (-28.8, 83.6) (p = 0.07). CONCLUSION: At the doses studied, testosterone undecanoate was as effective as sustanon at promoting short-term growth but changes in bone alkaline phosphatase were more marked during sustanon therapy.

Administration, Oral↗

Levels of mucin gene expression in normal human conjunctival epithelium in vivo.

PURPOSE: Conjunctival impression cytology (CIC) samples were used to determine the mean and normal range of mRNA levels of human MUC1, MUC2, MUC4, MUC5AC, and MUC7 mucin genes. METHODS: Real time PCR was performed to determine normal mRNA levels in CIC samples of 24 male and 19 female healthy donors. Correlation coefficients between gene expression levels were obtained. RESULTS: All five mucin genes were expressed in the CIC samples. MUC1 and MUC4 were present at the highest level and MUC2 was at the lowest. There were no gender differences. Significant positive correlations existed between MUC2 and MUC4 and between MUC2 and MUC7 levels. CONCLUSIONS: Normal levels and ranges of mRNAs for MUC1, MUC2, MUC4, MUC5AC and MUC7 conjunctival mucin genes have been established for the first time. These data may serve as the normal threshold values for future comparisons in different experimental and pathological conditions involving the ocular surface.

Adult↗

[Clinical risk factors for postoperative proliferative vitreoretinopathy (PVR). A prospective study].

PURPOSE: To identify clinical risk factors for development of postoperative PVR, to determine the incidence of this complication and its time of onset by a prospective multicentric study. METHODS: A multicentric and prospective study of 223 patients with rhegmatogenous retinal detachment (RD) was conducted. Logistic regression analysis was used to identify risk factors for PVR among 83 variables related to preoperative, intraoperative and postoperative characteristics. RESULTS: 22 out of 223 RD developed PVR (incidence 9.9%, confidence interval 95%: 5.9-13.9). After logistic regression analysis, four variables showed an odds ratio higher than 1.0 (RD affecting 4 quadrants, cryopexy, aphakia/pseudophakia and those RD in which an encircling band was implanted). None of these factors showed a < > value lower than 0.05. Most of postoperative PVR (77.2%) appeared in the first month after surgery. CONCLUSIONS: This study establishes the incidence of PVR, and its time of onset, but it was not effective to identify clinical risk factors with a high level of confidence.

Adolescent↗

Pars planitis: epidemiology, treatment, and association with multiple sclerosis.

During retrospective and prospective studies, we attempted to determine the clinical characteristics, treatment, and visual outcome of patients with pars planitis and to evaluate the association between pars planitis and multiple sclerosis (MS). The retrospective study included 44 patients with pars planitis, who had been examined between October 1986 and January 1999. We analyzed age, sex, visual acuity (VA), median follow-up time, and medical and surgical treatments. The prospective study, which included 21 consecutive patients with pars planitis, was performed to determine the presence of MS. In the retrospective study, the mean patient age was 22.4 years (SD +/- 11.5) and the median follow-up was 34.9 months (SD +/- 27.2). Complications included macular edema (47.7%), vitreous opacities (38.6%), papillitis (38.6%), vasculitis (36.4%), and cataract (20.5%). Forty patients (90.9%) had a final bilateral VA better than 20/40. In the prospective study, magnetic resonance imaging (MRI) was performed. Demyelinating lesions were found in 10 (47.6%) of the 21 patients and relapsing-remitting clinically definite MS was diagnosed in seven (33.3%). With the exception of age, no significantly statistical differences were observed when the visual prognosis and the clinical and epidemiologic characteristics were compared between the two groups of patients with and without associated MS; a diagnosis of MS was more frequently made in patients over 25 years of age. With appropriate treatment, patients with pars planitis have a good visual prognosis. Because the presence of demyelinating lesions seems to be high among patients with pars planitis, MRI should be considered, especially in patients over 25 years of age.

Adolescent↗

Bupivacaine wound instillation via an electronic patient-controlled analgesia device and a double-catheter system does not decrease postoperative pain or opioid requirements after major abdominal surgery.

UNLABELLED: To assess the analgesic efficacy of patient-controlled bupivacaine wound instillation, 50 patients undergoing major intraabdominal surgery were enrolled into this prospective, placebo-controlled, double-blinded study. In all cases, a standard general anesthetic was administered. On completion of surgery, two multihole 20-gauge epidural catheters were tunneled through the proximal and distal apices of the surgical wound and placed above the fascia such that the tips were at the margin of the first and second thirds of the surgical wound, respectively. Postoperatively, a patient-controlled analgesia (PCA) device was connected to the instillation system. Either bupivacaine 0.25% (Bupivacaine Group) or an equal volume of sterile water (Control Group) was administered. The PCA device was programmed to deliver 9.0 mL with a 60-min lockout interval and no basal infusion. During the first six postoperative hours, a coinvestigator administered "rescue" morphine (2 mg IV). Thereafter, meperidine 1 mg/kg IM was administered on patient request for additional analgesia. Instillation attempts and actual number of injections were similar between the groups. The mean number of pump infusions and the mean "rescue" opioid requirements during the 24-h study period were similar between the groups. The total "rescue" morphine administered during the first six postoperative hours was 16 +/- 17 mg vs 18 +/- 14 mg for the Bupivacaine and Control Groups, respectively. The total meperidine administered during this period was 1.6 +/- 1.4 mg/kg and 2 +/- 1.2 mg/kg for the Bupivacaine and Control Groups, respectively. Preoperatively, hourly for the first six postoperative hours, and on removal of the instillation catheter, patient-generated visual analog scales for pain were similar at rest, on coughing, and after leg raise. In conclusion, bupivacaine wound instillation via an electronic PCA device and a double-catheter system does not decrease postoperative opioid requirements after surgery performed through a midline incision. IMPLICATIONS: After major abdominal surgery performed through a 20-cm incision, repeated 0.25% bupivacaine wound instillation via an electronic patient-controlled analgesia device and a double-catheter system does not decrease postoperative pain or opioid requirements.

Abdomen↗

Volvulus of the stomach in childhood: the spectrum of the disease.

INTRODUCTION: During a 5-year time frame, five cases of symptomatic gastric volvulus were diagnosed and treated in our department. Four presented with the acute form of gastric volvulus and underwent emergency surgery. The fifth suffered the chronic variant of the syndrome and was benefited by nonoperative management. The cases serve to remind emergency physicians of the spectrum of gastric volvulus. The report supplements the sparse clinical description in the emergency literature. RESULTS: In the operated patients, there were no postoperative complications. The outcome, to the time of publication, has been good in every instance. The history, etiology, presentation, and treatment of the disease are discussed in detail. CONCLUSIONS: Not infrequently, gastric volvulus in children fails to exhibit the full gamut of signs and symptoms such as abdominal distension, vomiting, pain, and retching. For this, as well as for other stated reasons, symptomatic gastric volvulus in infancy and childhood may not be as rare as is commonly assumed.

Acute Disease↗

A pilot study of a long acting somatostatin analogue for the treatment of refractory rheumatoid arthritis.

OBJECTIVE: To evaluate the efficacy and safety of a long acting somatostatin analogue in a subset of patients with refractory rheumatoid arthritis (RA). METHODS: Ten patients with active, refractory RA, who had failed to respond to at least four disease modifying antirheumatic drugs (DMARDs), were treated with monthly intramuscular injections of 20 mg of a long acting preparation of octreotide (Sandostatin-LAR) for three months. They were evaluated every two weeks in an open label pilot study. The primary measure of clinical response was the American College of Rheumatology criteria for a 20% improvement in measures of disease activity (ACR 20). RESULTS: Eight patients completed the 14 week trial, while two patients received only one or two doses of the somatostatin analogue, but were eligible for evaluation. On an intention to treat basis 6/10 patients responded: four patients met the ACR 20 criteria at weeks 6-10, while two patients continued to improve with time, and met the ACR 50 and 70 criteria respectively, at week 14. On evaluation of the 10 patients as a group, a significant improvement (p<0.05) was noted in the mean visual analogue scales of pain, doctor's and patient's global assessment of disease activity, and in the mean number of swollen joints. Adverse effects were minor: transient bloating and loose stools, an urticarial rash (n=1), and a transient increase of liver enzymes (n=1). CONCLUSION: Treatment with a long acting somatostatin analogue led to significant clinical improvement in a subset of patients with active, refractory RA. The treatment was relatively safe and well tolerated. Further large, placebo controlled studies are required to evaluate this drug as a potential DMARD for patients with RA.

Adult↗

[Acute colonic pseudo-obstruction].

Colonic Pseudo-obstruction is a poorly understood syndrome. It was first described by Ogilvie in 1948 and is characterized by signs of large bowel obstruction with a non-mechanical etiology. The suggested cause of this pathophysiology is an imbalance in the autonomic nerve supply to the colon. The syndrome affects mainly old, bedridden patients, usually hospitalised for non-colonic causes. The actual incidence of this syndrome is unknown, mainly due to the fact that spontaneous recovery may occur. When massive abdominal distention is apparent, diagnosis and treatment are usually problematic and other causes of obstruction must be ruled out. It is usually managed by water soluble contrast administered orally or rectally, or by colonic decompression. In extreme cases surgical treatment is required with significant morbidity and mortality. Pharmacologic management with parasympathomimetic drugs has been suggested recently. We describe the successful treatment of a patient with neostigmine and review the current literature.

Acute Disease↗

Consumer satisfaction with telehealth advice-nursing.

An increase in interest in the establishment of telephone advice services has resulted in the proliferation of call centers. Despite their wide usage, research for the most part has not addressed the quality of care in relation to consumer satisfaction. This paper examines consumer outcomes of satisfaction, and follow-up with recommendations, within a framework of the nursing process and its associated components of assessment (including problem identification), care planning, intervention, and evaluation. The data for the study were obtained from seven after-hours call centers operating under the auspices of health maintenance organizations, preferred provider organizations, and private insurance companies. A sample of 157 non-redundant telephone calls from adults with medical-surgical problems were audiotaped with providers' and callers' consent. Sociodemographic information of the advice nurses, and chief complaints of the callers were obtained. The quality of nursing of the audiotaped calls was rated through an implicit review method by registered nurse raters using an advice nurse structured implicit review (AN-SIR) form developed for the study. Follow-up information was obtained through telephone calls to ascertain the consumers' perceptions of satisfaction, helpfulness, and follow-through with recommendations. Results indicated that consumers calling with a variety of general complaints contacted 32 nurses in advice nurse call centers. The quality of nursing process was found to be the best in the area of intervention. Evaluation was also well above the midpoint on a transformed scale of zero to 100. Assessment, although slightly above midpoint, was the lowest of the three components of the nursing process examined. Consumer satisfaction was high with 95.4 percent of the consumers rating the calls as completely or at least somewhat satisfied, and 93.2 percent, stating the advice was very or somewhat helpful. Exploratory regression analysis showed that the component of intervention was significantly related to consumer satisfaction. The present study pioneers the way to rate the quality of the advice nurses' interactions with consumers, and lays the groundwork for further investigations of health care provider behavior and consumer outcomes. Further studies are recommended to investigate predictors of consumer satisfaction, and cost-benefit in terms of consumer expenditures of time, funds, and energy.

Adult↗

[In vitro toxicity of non-preserved artificial-tear formulations].

PURPOSE: To analyse the putative toxic effect of three commercially available non-preserved artificial tear formulations on in vitro human conjunctival cells. MATERIAL AND METHOD: A conjunctival human epithelial cell line was exposed to Cellufresh, Oculotect and Acuolens formulations during 1, 3 and 24 hours. Cytotoxicity was measured by calculating the percentage of cell viability examination and scanning electron microscopy (SEM). Controls underwent exposure to supplement free DMEM-F12 (negative control) and exposure to 0.005% benzalkonium chloride solution (positive control). RESULTS: Cell viability after 1 or 3 hours incubation with Cellufresh and Oculotect was similar to that obtained for negative controls. With Acuolens incubation however, cell viability showed significant reduction after 3 and 24 hours compared to control. SEM showed that Cellufresh and Oculotect exposed cells presented similar behavior to control cells. All three cell lines presented evidence of cellular surface alteration after incubation for 1 or 3 hours compared to controls, Acuolens showing the highest rate of alterations in exposed cells and an additional increment in cell loss was observed. CONCLUSION: In the present study, non preserved artificial tears formulations showed a different degree in their in vitro toxicity, Acuolens being more toxic than Cellufresh or Oculotect.

Cell Survival↗

Effects of unilateral deprivation in postnatal development of the olfactory bulb in an altricial rodent, the gerbil (Meriones unguiculatus).

To establish if olfactory bulb sensitivity to functional deprivation is related to the degree of development at birth, we studied the effects of surgical closure of one naris in the gerbil olfactory bulb development. The naris closure was performed at three different ages: at birth, P7 and P14 and maintained for 30 or 60 days. In coronal sections we measured total bulbar surface area and surface area of the different bulbar layers establishing an estimate multiple regression model for the percentage of surface area decrease in the deprived bulb related to non deprived one. The internal and external plexiform layers are the most sensitive layers to deprivation and age and duration of deprivation were factors in their mathematical models. The glomerular layer showed a surface reduction of about 25% without dependence either on age or duration. The deprived glomerular layer showed a much lower tyrosine hydroxylase-immunoreactivity and immunoreactive cell density than those in the non deprived one. However, differences in calbindin-immunoreactive and NADPH-diaphorase positive cell density between deprived and non deprived glomerular layer were not significant. Our results indicate that olfactory bulb sensitivity to functional deprivation is not related to the degree of precocity and changes in age and duration of deprivation cause different effects on the olfactory bulb layers.

Animals↗

Treatment of acute colonic pseudo-obstruction with neostigmine.

BACKGROUND: Colonic pseudo-obstruction is a poorly understood syndrome, described by Ogilvie, and characterized by signs of large-bowel obstruction, without a mechanical cause. An imbalance in the autonomic nerve supply to the colon has been suggested as the pathophysiology. Recently, promising results with pharmacologic manipulation with neostigmine have been described. STUDY DESIGN: A prospective study was undertaken with 11 consecutive patients with clinical and radiologic signs of colonic pseudo-obstruction, in one general hospital, over a 1-year period. Patients were treated primarily with 2.5 mg of neostigmine in 100 mL of saline for 1 hour, under cardiac monitoring. Results were assessed by the clinical and radiologic responses. RESULTS: Rapid and effective spontaneous decompression of the colon was achieved in 8 patients after a single dose of neostigmine, within a mean of 90 minutes from the beginning of treatment. In another two patients decompression occurred only after a second dose was administered 3 hours after the first dose. In one patient, no changes were observed and colonoscopic decompression was performed. No significant bradycardia was observed in any of the patients. CONCLUSIONS: Neostigmine is a simple, safe, and effective therapy for treatment of colonic pseudo-obstruction.

Acute Disease↗

Octreotide treatment in patients with severe acute pancreatitis.

We investigated the effect of octreotide in the treatment of severe acute pancreatitis in a case-control study. Experimental and clinical studies on the effect of octreotide in the treatment of acute pancreatitis have shown controversial results. Since January 1992, we have been conducting a prospective randomized study on the effect of octreotide in severe acute pancreatitis, in three hospitals in Israel. The entering criteria included three or more of the Ranson prognostic signs and CT findings of severe pancreatitis. Patients were randomly assigned to conservative treatment either with or without octreotide (0.1 mg subcutaneously three times a day). The end points of the study included: complication rate (ARDS, sepsis, renal failure, pseudocyst, fistula, and abscess), length of hospital stay, and mortality. From January 1992 to December 1996, 60 patients entered the study. After evaluating the files, 10 patients were excluded due to failure to meet the entering criteria, incomplete data, or incorrect diagnosis. Of the remaining 50 patients, 25 were assigned to octreotide (treatment group) and 25 to conservative treatment only (control group). The two groups matched with regard to age, sex, etiology, and severity of the disease. The complication rate was lower in the treatment group with regard to sepsis (24% vs 76%, P = 0.0002) and ARDS (28% vs 56%, P = 0.04). The hospital stay was shorter in the treatment group (20.6 vs 33.1 days, P = 0.04). Two patients died in the treatment group and eight in the control group (P < 0.019). These results suggest that octreotide may have a beneficial effect in the treatment of severe acute pancreatitis.

Adult↗