Gender specific correlations of adrenal gland size and body fat distribution: a whole body MRI study.

OBJECTIVE: The aim of this study was to investigate the gender specific correlations of stress related tissues [adrenal gland volume (AV), visceral fat] and alimentary dependent fat compartments with cortisol concentrations in healthy male and female subjects. METHODS: Fourteen men and 13 women were examined. Fat compartments [whole body fat, visceral adipose tissue (VAT) and subcutaneous adipose tissue (SCAT)] were determined using whole body MRI. Adrenal gland volume was assessed by a 3D MR data set. The salivary cortisol was determined at 9 AM and 4 PM. RESULTS: Men had significantly more visceral fat and less subcutaneous fat than women. Adrenal gland size correlated significantly with the visceral and subcutaneous fat in women (r=0.7, p=0.008), but not in men (r=0.2, p=0.4). There was a negative correlation between the decrease of cortisol between 9 AM and 4 PM with VAT (r=-0.451, p=0.027) in the whole group. DISCUSSION: The high correlation between the adrenal gland volume and VAT in women underlines the link between hypothalamic-pituitary-adrenal (HPA) axis, stress, and circadian cortisol rhythm, respectively, and an increased abdominal fat volume. The lack of correlation between visceral fat and adrenal volume in men points to an additional influence of sex hormones.

[Minimal invasive pediatric surgery: development and progress by innovative technology]. / Minimalinvasive Kinderchirurgie: Entwicklung und Fortschritt durch innovative Technologie. Die ATCS-Klebung.

BACKGROUND: Minimally invasive pediatric surgery (MIPS) has a solid tradition in which technique and technology have made key contributions to an already broad range of indications. This surgical method still has a deficiency with regard to tissue management of large-area defects, however. Sealing techniques can further expand the range of application. METHOD: Technological evaluation provided outstanding data of fleece-bound collagen- and fibrinogen-based sealing systems (TachoComb) on biodegradability, adhesive strength and practicability. A relevant instrument was developed for MIS application and was introduced as the ATCS (AMISA-TachoComb-System). PATIENTS: From 1993-2000, ATCS sealing was carried out in the scope of thoracoscopy (105 procedures) and laparoscopy (53 procedures) and specifically for recurring pneumothorax, traumatic chylothorax and splenic trauma. RESULTS: Pneumothorax: 59 ACTS procedures in 49 patients (mean age: 11.4 yrs) with 6 reoperations (10.2%) and one recurrence (1.7%). The drainage dwell time was reduced (p < 0.05) using a conventional comparison (31.9 hours vs. 17 days) and further relevant parameters were also reduced. Chylothorax: 3 ATCS procedures in 3 patients (mean age: 6.3 years) with reduction in the drainage dwell time (p < 0.05) based on a conventional comparison (35 hours vs. 18 days). Splenic trauma: 17 ATCS procedures in 16 patients (mean age: 8.9 years) with one re-operation (5.9%) for associated liver trauma, organ conservation in each case and no significant drainage volumes. CONCLUSION: The ATCS is an innovative instrument for MIPS and ca be employed for efficient and socio-economic (e.g. DRGs) closure of large-area defects.

Collagen patches impregnated with antimicrobial agents have high local antimicrobial efficacy and achieve effective tissue gluing.

BACKGROUND: Local antimicrobial systems have gained importance, as illustrated by current research on drug delivery systems (DDS). We aimed to develop materials that combine hemostatic and antimicrobial efficacy as well as adhesiveness for use in surgical tissue management. MATERIALS AND METHODS: Materials were evaluated by in vitro studies employing microbiological and technological methods. RESULTS: Antimicrobial impregnation of a collagen fleece, which is a pre-coated fibrinogen-based adhesive and therefore ready-to-use (TachoComb), is significantly more efficient--both in terms of the antimicrobial efficacy (p < 0.001) as well as the adhesive strength (p = 0.03) -than coating an antibiotic-containing collagen fleece "on-site" with fibrin glue. CONCLUSION: Due to ease of practical handling and favorable pharmacoeconomics, this DDS is recommended for both open and minimally invasive surgery.

Practice versus knowledge when it comes to pressure ulcer prevention.

PURPOSE: This study was completed to determine the current knowledge and documentation patterns of nursing staff in the prevention of pressure ulcers and to identify the prevalence of pressure ulcers. METHODS: This pre-post intervention study was carried out in three phases. In phase 1, 67 nursing staff members completed a modified version of Bostrom's Patient Skin Integrity Survey. A Braden Scale score, the presence of actual skin breakdown, and the presence of nursing documentation were collected for each patient (n = 43). Phase II consisted of a 20-minute educational session to all staff. In phase III, 51 nursing staff completed a second questionnaire similar to that completed in phase I. Patient data (n = 49) were again collected using the same procedure as phase I. RESULTS: Twenty-seven staff members completed questionnaires in both phase I and phase III of the study. No statistically significant differences were found in the knowledge of the staff before or after the educational session. The number of patients with a documented plan of care showed a statistically significant difference from phase I to phase III. The number of patients with pressure ulcers or at risk for pressure ulcer development (determined by a Braden Scale score of 16 or less) did not differ statistically from phase I to phase III. CONCLUSION: Knowledge about pressure ulcers in this sample of staff nurses was for the most part current and consistent with the recommendations in the Agency for Health Care Policy and Research guideline. Documentation of pressure ulcer prevention and treatment improved after the educational session. Although a significant change was noted in documentation, it is unclear whether it reflected an actual change in practice.

Orthopedic nursing practice guidelines. The NAON Standards Task Force.

The NAON Standards Task Force has revised Orthopaedic Nursing: Process and Outcome Criteria for Selected Nursing Diagnoses published jointly by the American Nurses' Association (ANA) and NAON in 1986. The new document is entitled Orthopaedic Nursing Practice Guidelines. It contains guidelines for the care of orthopaedic patients with 11 selected nursing diagnoses and is an important decision-making tool for orthopaedic nurses. This article contains excerpts from the new guidelines with suggestions for its use.

A convenient and reproducible filtration technique for the determination of erythrocyte deformability.

A simple method for the determination of red cell filterability (deformability) in leucocyte-free suspensions of washed erythrocytes is described. All equipment used is inexpensive and readily available. Polycarbonate membranes of 5 microns porosity are regenerated after each filtration. Consecutive filtration measurements allow for very good precision. The proposed method has high sensitivity for suspensions of overall slightly stiffened red cells or mixtures of normal and small numbers of greatly abnormal erythrocytes. In the latter case the method also fractionates. The method has been tested in vitro. Both human albumin solution and acetyl salicylic acid increased erythrocyte filterability. Chlorhexidine and silver sulphadiazine on the other hand adversely affected filterability. The technique is very suitable for the investigation of the effect of pharmacologically active materials on red cell filterability (deformability).

Effect of surgery on the systemic inflammatory response to intermittent claudication.

The hypothesis that intermittent claudication initiates a systemic inflammatory response was investigated by studying the effect of exercise on markers of neutrophil activation and vascular permeability in 25 claudicants and 10 controls. Urinary albumin excretion, previously demonstrated to reflect vascular permeability, increased significantly after exercise in claudicants and was associated with decreased neutrophil filterability and increased serum lysozyme activity. No similar exercise-induced changes were seen in controls or in claudicants after successful arterial bypass surgery. These results suggest that intermittent claudication is associated with potentially deleterious systemic manifestations that are surgically reversible.