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Ergonomic aspects of four different types of laparoscopic instrument handles with respect to elbow angle. An electromyogram-based study.
Surg Endosc. 2002 Nov; 16(11):1528-32.SE

Abstract

BACKGROUND

Only few studies have tested different ergonomic aspects of the working posture assumed by laparoscopic surgeons. Although no experimental data are available for a laparoscopic setting, a working posture with a horizontal forearm or an elbow angle 90 degrees to 120 degrees has been recommended for performing minimally invasive surgery (MIS). The comparison of electromyogram (EMG) activities in different muscles provides information about the force developed by each muscle and allows assessment of its contribution to a functional movement. The current study aimed to investigate whether certain handles do not support this posture.

METHODS

For this study, 12 volunteers were postured in two different standardized arm positions, defined by elbow angles of 90 degrees and 120 degrees. They were manipulating a 0.1-N and a 2.5-N microswitch with four different types of instrument handle design: axial handle, ring handle, shank handle, Hirschberg handle. During the test, the EMG activities of five forearm muscles were recorded and normalized with respect to the maximum voluntary activity of the respective muscle.

RESULTS

Virtually no significant difference in EMG activity was found between the two elbow angles in any of five forearm muscles for a simple grasping maneuver. Thus, the muscle activity required to manipulate different types of MIS handles is similar for the elbow angles of 120 degrees and 90 degrees.

CONCLUSIONS

The current study did not show relevant differences between the two elbow angles for any of the four handles during a simple grasping maneuver with respect to the force required in the main forearm muscles.

Authors+Show Affiliations

Department of General Surgery, Study Group Surgical Technologies, University Hospital Freiburg, Hugstetter Strasse 55, 79106 Freiburg i. Br., Germany. matern@ch11.ukl.uni-freiburg.deNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

12085133

Citation

Matern, U, et al. "Ergonomic Aspects of Four Different Types of Laparoscopic Instrument Handles With Respect to Elbow Angle. an Electromyogram-based Study." Surgical Endoscopy, vol. 16, no. 11, 2002, pp. 1528-32.
Matern U, Giebmeyer C, Bergmann R, et al. Ergonomic aspects of four different types of laparoscopic instrument handles with respect to elbow angle. An electromyogram-based study. Surg Endosc. 2002;16(11):1528-32.
Matern, U., Giebmeyer, C., Bergmann, R., Waller, P., & Faist, M. (2002). Ergonomic aspects of four different types of laparoscopic instrument handles with respect to elbow angle. An electromyogram-based study. Surgical Endoscopy, 16(11), 1528-32.
Matern U, et al. Ergonomic Aspects of Four Different Types of Laparoscopic Instrument Handles With Respect to Elbow Angle. an Electromyogram-based Study. Surg Endosc. 2002;16(11):1528-32. PubMed PMID: 12085133.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ergonomic aspects of four different types of laparoscopic instrument handles with respect to elbow angle. An electromyogram-based study. AU - Matern,U, AU - Giebmeyer,C, AU - Bergmann,R, AU - Waller,P, AU - Faist,M, Y1 - 2002/06/27/ PY - 2001/08/16/received PY - 2002/04/01/accepted PY - 2002/6/27/pubmed PY - 2002/12/31/medline PY - 2002/6/27/entrez SP - 1528 EP - 32 JF - Surgical endoscopy JO - Surg Endosc VL - 16 IS - 11 N2 - BACKGROUND: Only few studies have tested different ergonomic aspects of the working posture assumed by laparoscopic surgeons. Although no experimental data are available for a laparoscopic setting, a working posture with a horizontal forearm or an elbow angle 90 degrees to 120 degrees has been recommended for performing minimally invasive surgery (MIS). The comparison of electromyogram (EMG) activities in different muscles provides information about the force developed by each muscle and allows assessment of its contribution to a functional movement. The current study aimed to investigate whether certain handles do not support this posture. METHODS: For this study, 12 volunteers were postured in two different standardized arm positions, defined by elbow angles of 90 degrees and 120 degrees. They were manipulating a 0.1-N and a 2.5-N microswitch with four different types of instrument handle design: axial handle, ring handle, shank handle, Hirschberg handle. During the test, the EMG activities of five forearm muscles were recorded and normalized with respect to the maximum voluntary activity of the respective muscle. RESULTS: Virtually no significant difference in EMG activity was found between the two elbow angles in any of five forearm muscles for a simple grasping maneuver. Thus, the muscle activity required to manipulate different types of MIS handles is similar for the elbow angles of 120 degrees and 90 degrees. CONCLUSIONS: The current study did not show relevant differences between the two elbow angles for any of the four handles during a simple grasping maneuver with respect to the force required in the main forearm muscles. SN - 1432-2218 UR - https://www.unboundmedicine.com/medline/citation/12085133/Ergonomic_aspects_of_four_different_types_of_laparoscopic_instrument_handles_with_respect_to_elbow_angle__An_electromyogram_based_study_ L2 - https://doi.org/10.1007/s00464-001-9157-8 DB - PRIME DP - Unbound Medicine ER -