Revista chilena de pediatría
versión impresa ISSN 0370-4106
ESCALONA D'A, PAMELA; NARANJO O, JEANNETTE; LAGOS S, VERÓNICA y SOLIS F, FRESIA. Normal Parameters in Hand Grasping Strength in subjects of both genders, 7 to 17 years of age. Rev. chil. pediatr. [online]. 2009, vol.80, n.5, pp.435-443. ISSN 0370-4106. http://dx.doi.org/10.4067/S0370-41062009000500005.
Introduction: Determining normal parameters in hand grasping strength will allow to determine clinical conditions and treatment results in patients with changes in hand dexterity. Purpose: Establish ranges of normal strength in three types of grasp in subjects of both genders, ages 7 to 17. Materials and Methods: 753 random subjects selected from schools in the Metropolitan Region, two-stage sampling, 2.12% error. The following tests were performed: cylindrical palmar (dynamometer), spherical palmar (vigorimeter), and subterminolateral clasp prehension (clasp). Means tests with 95% confidence were calculated. Results: 96.1% women and 95.6 men were right hand dominant. For cylindrical test, strength increased from 10.3 to 25 kg average at 17 years of age in women, in men in increased slowly up to 12 years of age reaching 39 kg at the end of the study. Spherical prehension showed slow, gradual increase reaching 0.45 bar in women and 0.65 bar in men at 17 years of age. Clasp at 17 years of age was 6.9 and 9.5 kg for women and men respectively. Conclusions: When the right hand is dominant, it is at least 6% stronger in clasp than the left hand in women, 5% in fist and clasp in men, with a 95% confidence between gender between the ages of 7 and 17. These data could be used as reference in patients with pathology that compromises dexterity in urban areas.
Palabras clave : Force; grasping; manual function; dynamometer; bulb dynamometer; pinch meter; age.