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At least 109 records · Page 6Linked to original sources

Intraoperative custom press-fit and standard press-fit femoral components in total hip arthroplasty. A comparison of surgery, charges, and early complications.

A consecutive group of 60 patients who had intraoperative custom press-fit total hip arthroplasties (67 hips; Identifit, Thackray, London, United Kingdom) was compared with a similar group of 60 patients who had standard press-fit arthroplasties (66 hips; McCutchen, Wright Medical Technologies, Arlington, Tennessee) to determine if there were differences in operative time and charges, as well as early complications and early radiographic results. The unilateral intraoperative custom group had an average anesthesia time of 3 hours, 39 minutes, an operating time of 2 hours and 26 minutes, and a blood loss of 725 mL. The averages for the standard group included an anesthesia time of 2 hours, 19 minutes, a surgical time of 1 hour, 25 minutes, and a blood loss of 480 mL. By 6 months after surgery, 49 (73%) in the custom group had subsidence of 2 mm or more, compared with 10 hips (15%) in the standard group. The custom group had 17 early postoperative complications versus 3 in the standard group. The charge for the hospital stay averaged $19,950 for the custom group and $14,322 for the standard group. At the present time, the high incidence of complications and the increased charges make the intraoperative custom hip replacement an unlikely first choice of recommendation.

Adult↗

Use of a loudness model for hearing aid fitting. IV. Fitting hearing aids with multi-channel compression so as to restore 'normal' loudness for speech at different levels.

Many researchers have proposed that multi-channel compression hearing aids should process sounds so as to restore loudness perception to 'normal'. However, procedures for achieving this have generally been based on measurements or calculations using narrowband stimuli, and these procedures may not be accurate for broadband sounds such as speech. Here, a model for predicting loudness for people with cochlear hearing loss is used to calculate the frequency- and level-dependent gains that would be required to restore loudness perception to 'normal' for speech-like signals. The calculations are based entirely on the pure tone audiogram, and do not require measures of loudness growth. The model was applied to several different hypothetical hearing losses, varying in slope and severity. In each case, the model was used to calculate the insertion gains (IGs) that would be required as a function of frequency so that speech-shaped noise with a level of 65 dB SPL would evoke a specific loudness pattern matching that for a normal ear. A similar procedure was applied using speech-shaped noise with a level of 85 dB SPL (with the spectral characteristics of shouted speech). The results were used to derive functions relating the required IG to hearing loss for each audiometric frequency and each speech-shaped noise level. These functions were used in turn to derive compression ratios and gains for each channel of a multi-channel compression system. The derivations apply to systems with any number of channels. The outcome is a method than can be used for the initial fitting of multichannel compression hearing aids, so as to restore loudness perception to near 'normal' for broadband speech-like signals.

Acoustic Stimulation↗

Fitness to work: fitness to travel.

1. According to Edwards (1988), "Fitness to work means being able to do the tasks involved effectively and without risk to one's own, or to others' health and safety." 2. Travel hazards can be biological, chemical, physical, and psychological in nature. 3. Travel hazard management includes pre- and posttravel health assessments, immunization, use of antimalarials, travel kit preparation, health insurance coverage, compliance to country admission regulations, and country-specific health and cultural briefing. 4. Educational and preventive practices are needed to prepare employees for high risk international travel. Through counseling and advice, occupational health services can help employees and employers with health risk management. High risk travel can be lowered to a moderate-low risk situation.

Health Education↗

Military fitness class of Finnish 18-year-old men--prediction of military fitness class at call-up with the YASR and sociodemographic factors.

OBJECTIVE: The aim of this study was to examine psychosocial factors associated with military fitness class, classified as capability of service, vs. temporary or permanent exemption from service. METHOD: Participants were 2,340 (80% of the original sample) Finnish 18-year-old men at call-up for obligatory military service who filled in the Young Adult Self-Report (YASR) questionnaire. RESULTS: Temporary exemption from military service was independently associated with the YASR total problem score, externalizing and internalizing problems, excessive alcohol use, drug use, problems with peers and family, and mental health service use. Permanent exemption was independently associated with problems with peers and family. CONCLUSION: The YASR is a potential selection tool to be used at call-up. Temporary exemption was more strongly associated with psychosocial problems than permanent exemption. Because of the high level of psychological problems among those temporarily exempted, the call-up situation offers a unique opportunity to identify those with problem behaviour and risk of marginalization.

Adolescent↗

NL-FIT: a microcomputer program for non-linear fitting.

A program for a microcomputer (HP 85) has been written using BASIC language. Given the analytical form of a model y: R leads to R the program computes the optimal parameters for non-linear least-squares fitting and gives information for its statistical evaluation. The program uses the Gauss-Newton algorithm with Marquardt's modification and other tricks. During the run a message is displayed if there is a high correlation between one or more couples of parameters to establish an interactive dialogue with the user on critical problems. The authors' aim was to make the program sufficiently quick and easy to use, efficient for a wide class of models and robust enough to deal with bad starting parameters.

Computers↗

ICSH recommendations for the analysis of red cell, white cell and platelet size distribution curves. Methods for fitting a single reference distribution and assessing its goodness of fit. International Committee for Standardization in Haematology. ICSH Expert Panel on Cytometry.

The algorithm in Figure 7 summarizes the overall approach to fitting a single reference distribution. If no statistically significant difference is found, the investigation should assess whether the power of the chi-squared test was insufficient to detect differences of practical significance. If a statistical difference is found, Appendices B and C and Figure 6 may be used to determine whether the sample size and the power have led to the detection of an effect size too small to be of importance.

Algorithms↗

Fitting fitness into women's lives: effects of a gender-tailored physical activity intervention.

Although regular exercise has important health benefits, women's physical activity participation remains low. Addressing the gender- and generation-specific barriers in an intervention may help women become more physically active. Fifty women (mean age = 45 years) participated in a six-session cognitive-behavioral intervention. Baseline, post-intervention, and follow-up data were collected. Total physical activity levels increased from baseline to post-intervention and were maintained at long-term follow-up. This research suggests that participation in a comprehensive, cognitive-behavioral, and empowerment-based physical activity intervention, tailored to address women's distinct constraints and pressures due to sociopsychological experiences, can facilitate increased physical activity among white, middle-aged women.

Behavior Therapy↗