Skip to main content

Table 1 Summary of studies evaluating power grip

From: Power grip, pinch grip, manual muscle testing or thenar atrophy – which should be assessed as a motor outcome after carpal tunnel decompression? A systematic review

Study Instrument Unit of measurement Handle position Patient positioning
Agee et al., 1992 [9] Jamar % all 5 settings NR
Bhattacharya et al., 2004 [28] Jamar % 2 NR
Brown et al., 1993 [10] Jamar lbs NR NR
Brüser et al., 1994 [18] Jamar % NR NR
Citron and Bendall, 1997 [16] Martin Vigorimeter kpa NR NR
Dias et al., 2004 [29] Jamar kg NR Y
Dumontier et al., 1995 [14] Jamar kg NR NR
Erdmann, 1994 [11] Jamar lb NR NR
Ferdinand and Maclean, 2002 [22] Baseline hydraulic Ib NR NR
Foulkes et al., 1994 [12] Jamar lb 22 NR
Helm and Vaziri, 2003 [26] Baseline hydraulic kg NR NR
MacDermid et al., 2003 [24] digit grip device1 kg NR but cites refs NR but cites refs
Mackenzie et al., 2000 [19] Baseline hydraulic kg 2 NR
Mackinnon et al., 1991 [8] NR kg NR NR
Nakamichi & Tachibana, 1997 [17] NR kg NR NR
Saw et al., 2003 [25] Jamar kg NR NR
Sennwald & Benedetti., 1995 [13] Jamar kg 2 NR
Trumble et al., 2002 [20] Jamar kg all 5 settings NR
Wong et al., 2003 [27] NR % NR NR
  1. 1NK Biotechnical Corp, Minneapolis, MN, USA;
  2. 2 data adjusted for age, sex, and side.
  3. % = percent change from preoperative value
  4. NR = not reported
  5. lb = pounds
  6. kpa = kilopastels
  7. kg = kilograms