Extended dynamometry: reference values

Abstract

Grip strength is used as a measure of capacity in disability and personal injury claims. Although seemingly an objective measure, it is widely recognized that it is fallible to the effects of sub-maximal effort. We have developed an extended test protocol that uses the five positions of a Jamar dynamometer. The protocol mitigates the effect of inconsistency while retaining the ability to detect sub-maximal effort. Dynamometry was undertaken in 242 volunteers (male:female, 124:118) with a median age of 39 years (range 18–89, interquartile range 29–52). Normative values for consistency, curve deviation and variation from the expected curve pattern are provided. None of these measures were significantly affected by laterality, hand dominance, sex or age despite the effects of these variables on grip strength. The study defines the methodology and reference values to allow assessment of both the capacity of a patient and the reliability of the test for use in medicolegal practice. Level of evidence: II

Criterios GLIM: análisis de su consistencia interna y una comparación con respecto a la valoración global subjetiva

“…La media de edad fue de 70 años (DE + 16,26) con un mínimo de 20 y un máximo Tabla 1. Herramienta de diagnóstico nutricional, criterios GLIM (7) -Fuerza de agarre disminuido: < -2 DE según el sexo y la edad del dinamómetro utilizado (20)(21)(22)(23) .…”

Cost-effectiveness and cost-utility of the ball-and-socket trapeziometacarpal prosthesis compared to trapeziectomy and ligament reconstruction: study protocol for a randomized controlled clinical trial

“…Patient-Rated Wrist Evaluation (PRWE) is a widely used measure of patient-reported disability and pain related to wrist disorders [ 36 ]. The grip strength using a dynamometer [ 37 ], followed by lateral (key) and pulp-to-pulp pinch, will be recorded (both in kilograms) with a JAMAR pinch meter [ 38 ]. The goniometry measurement is determined by a change in the range of motion, as defined by the IFSSH (Atlas of Surface Anatomy and Joint Motion.…”