Biomedical subjects

N B Meske

Publications and source records attributed to N B Meske.

8 recordsLinked to original sources

PubMed1994

Interdevice reliability and validity assessment of the Nicholas Hand-Held Dynamometer.

The Nicholas Hand-Held Dynamometer (HHD) has been shown to have excellent interday and intraday reliability when using the same HHD. Since clinics may have more than one HHD with which to evaluate patients, it would be of value to know if two identical HHDs measure the same variable consistently. The purpose of this investigation was to assess interdevice reliability of the Nicholas HHD as well as to determine its validity. Thirty healthy female subjects between the ages of 20 and 56 years (mean age = 28.4) were tested for hamstring strength. Three measurements of maximum hamstring contractions were obtained using the first HHD (Device A). The average of these three measurements was compared with the average of three measurements obtained after a brief rest using a second HHD (Device B). Measurements from the two HHDs were also compared with measurements obtained from a Kin-Com isokinetic dynamometer. The Kin-Com measurements were used as criteria to determine validity of the HHD. An intraclass correlation coefficient (ICC) calculated to determine reliability between the two HHDs was low (ICC = .58). Pearson product-moment correlation coefficients were calculated between the Kin-Com and each of the two HHDs. These values were .85 and .83 for Device A and B, respectively. Analysis of variance showed no significant difference between the Kin-Com and Device A but a significant difference between the Kin-Com and Device B (p < .001). Measurements obtained from two identical HHDs may be significantly different and should not be compared.

Adult↗

PubMed1994

Cross-validation of height and gender estimations of femoral condyle width in osteochondral allografts.

A cross-validation study was conducted on the estimation of femoral condyle width from height and gender. An equation was published in 1989 for estimation of femoral condyle width using in vivo measurements of femoral condyle width from radiographs. Further cross-validation evidence for this equation is reported using in vitro measurements from 27 cadavers. The data indicated a high correlation (r = 0.85) between actual and estimated femoral condyle width and an acceptable standard error of estimate (range, 4.48-4.29 mm). It was concluded that the published equation which uses height and gender to form an estimate of femoral condyle width has acceptable validity and is a useful tool in the selection process of donors for osteochondral allografts.

Bone Transplantation↗

PubMed1990

Genucom knee analysis system: reproducibility and database development.

The Genucom is a relatively new computerized system that performs a multidimensional analysis of knee laxity. Therefore, the purposes of the present investigation were twofold: 1) to estimate the reproducibility of the testing system in its ability to obtain similar test values on the same test subject within a back-to-back two-test protocol and 2) to develop a database of normal values as a standard against which values of suspected ligament injury can be compared to reliably determine whether, in fact, ligament injury has occurred. In the reproducibility phase of the study, 20 subjects were tested in two trials each of eight tests, yielding 20 separate test values per trial, accounting for each angle of flexion and plane of force tested. Both legs were tested, providing an N of 40. Test-retest correlations of the two trials and dependent t-tests indicated that the Genucom provided generally stable and reproducible results. In the normal value database phase of the study, 218 different subjects were given one trial of the same eight tests. Testing of both legs provided an N greater than 400. Means and standard deviations were calculated for each test.

Adult↗

PubMed1989

The estimation of femoral condyle size. An important component in osteochondral allografts.

An important component of successful osteochondral allograft surgery of the knee is securing a donor with a femoral condyle (FC) of the appropriate size. The purposes of the present investigation were to analyze the effect of femoral rotation on measurement of FC size and to determine if easily measured variables, such as manual caliper measurements, height, weight, and gender, are useful in matching donors and recipients. Three separate investigations were conducted to accomplish these purposes. The results indicated that femoral rotation has a significant negative effect on accurate sizing of the FC. Height and gender provide an acceptable prediction of femoral condyle size and can be used effectively in the donor selection process.

Body Height↗

PubMedDate not supplied

Concentric and eccentric torque comparisons for knee extension and flexion in young adult males and females using the Kinetic Communicator.

The purposes of this investigation were to establish average leg torque values as a proportion of body weight for both concentric and eccentric contractions for leg extension and leg flexion, to determine leg flexion/extension ratios for both concentric and eccentric contractions, and to compare those values in males and females from ages 15 to 34 years. The Kinetic Communicator (Kin-Com, Chattecx Corp., Chattanooga, TN), a relatively new computerized strength testing device, was used so that both concentric and eccentric torques could be measured. Pilot study results indicated that Kin-Com results were reliable, r greater than 0.88. Average torque, across the full range of motion, and peak torque expressed in newton meters were divided by body weight in kilograms to produce torque values adjusted by body weight. No differences across age or sex were observed for flexion/extension ratios, but the males' weight-adjusted torque values were significantly (P less than 0.01) greater than the females'. Younger (ages 15 to 24 years) male and female subjects produced significantly (P less than 0.01) greater torque for concentric contractions than older subjects (25 to 34 years). In rehabilitation programs using the Kin-Com, the weight-adjusted torque values and flexion/extension ratios will be useful in determining patients' strength recovery from knee or leg injury and/or surgery.

Adolescent↗

PubMedDate not supplied

Genucom, KT-1000, and Stryker knee laxity measuring device comparisons. Device reproducibility and interdevice comparison in asymptomatic subjects.

Generally, three devices (the Genucom Knee Analysis System, the MEDmetric KT-1000 Arthrometer, and the Stryker Knee Laxity Tester), which have been presented in the literature, may be used to assess clinically the amount of knee laxity in an objective manner. This study compared the reproducibility of the anterior and posterior knee laxity values for each and made direct comparisons of the results obtained. Thirty asymptomatic subjects were given a test-retest protocol on both legs with all three devices. Devices were tested in a counterbalanced order. Repeatability of test values within devices was variable, but all were acceptable, the lowest being r = 0.74. Analysis of variance (AN-OVA), and correlational analysis revealed that device-specific anterior and posterior laxity values were produced. We concluded that each commercially available knee laxity testing device can provide reproducible quantitative measurements of knee laxity; however, due to differences in device sensitivities and functional design, numerical results from one device cannot be generalized to another device.

Adult↗

PubMedDate not supplied

KT-1000 arthrometer: conscious and unconscious test results using 15, 20, and 30 pounds of force.

A recent published report indicated that the reliability and validity of anterior laxity measurements obtained by using the KT-1000 arthrometer were questionable. The purpose of our study was to examine the diagnostic validity of anterior laxity measurements testing patients in conscious and unconscious states using the KT-1000 arthrometer at 15, 20, and 30 pounds of force. The sample included 68 patients with confirmed anterior cruciate ligament disruption. They were given anterior-posterior drawer tests at 20 degrees in both unconscious and conscious states; measurements were recorded at 15, 20, and 30 pounds of force. The results indicated that the measurements in the unconscious state were significantly higher (P less than 0.01) than the values obtained in the conscious state. The anterior cruciate ligament-disrupted knees produced significantly higher (P less than 0.01) anterior laxity. The difference between anterior cruciate ligament-disrupted knees and normal knees grew significantly larger (P less than 0.01) as force increased. More patients demonstrated a difference greater than 2 mm between anterior cruciate ligament-disrupted knees and normal knees at 30 pounds (81% to 83%) than at 20 pounds (64% to 72%) of force. Seventy-nine percent of the patients demonstrated a compliance index difference greater than 1 mm using 15 and 30 pounds between the normal and anterior cruciate ligament-disrupted knee. These data provide statistical validity for the compliance index and support for the use of anterior laxity measurements at 30 pounds of force. However, approximately 20% of these patients did not demonstrate an anterior cruciate ligament-disrupted-normal knee difference greater than 2 mm or a compliance index difference of greater than 1 mm.

Anterior Cruciate Ligament↗

PubMedDate not supplied

Arthroscopy of the knee. Ten-day pain profiles and corticosteroids.

A prospective study was conducted to determine 10-day pain and analgesic use profiles of outpatients after arthroscopic surgery of the knee and to examine the effects of oral corticosteroid use on analgesic intake, perceived pain, and functional outcomes. Sixty-two patients who underwent a variety of arthroscopic procedures of the knee were matched on level of injury and surgical repair, and were assigned to two groups. The experimental group received a standard dosage of oral postoperative corticosteroids. The placebo group received the same dosage of a placebo (sugar pill). Both groups received the same prescription of an analgesic for pain relief after surgery. Results indicated that there were no significant differences for any dependent variables between the experimental and placebo groups. There were significant (P < 0.001) decreases in analgesic use and perceived pain throughout the 10 days. Conclusions were that most patients who have undergone arthroscopic surgery of the knee perceive pain at low levels, use limited amounts of analgesics, and return to work within a week. The addition of oral corticosteroids does not influence this profile.

Acetaminophen↗