Inter- and intraindividual variabilities of perforation forces of human and pig bowel tissue

Heijnsdijk, Eveline A.M.; Voort, Marjolein van der; Visser, Hans de; Dankelman, Jenny; Gouma, Dirk J.

doi:10.1007/s00464-003-9002-3

Cited by 43 publications

(34 citation statements)

References 13 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The damage-slip ratios determined on these healthy pigs can only be extrapolated to human tissue using large safety margins. Although in a previous study no differences were found between the perforation forces of healthy pig and human tissue [4], the strength of severely affected human tissue is unknown. The definition of damage used in this study was chosen so that all jaws could be compared, but the long-term effect of this kind of damage is unknown.…”

Section: Discussionmentioning

confidence: 96%

Slip and damage properties of jaws of laparoscopic graspers

et al. 2004

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 96%

Slip and damage properties of jaws of laparoscopic graspers

et al. 2004

Self Cite

View full text Add to dashboard Cite

show abstract

“…Relating the results to surgical practice, if the grasped object in this study had been human small bowel tissue, it would have frequently been perforated in condition T and GH, as pinch forces at which human small bowel is perforated are approximately 10.3 + 2.9 N (Heijnsdijk et al 2003). These perforation forces were measured with no pull force, meaning that adding a pull force would result in lower perforation forces.…”

Section: Discussionmentioning

confidence: 99%

Force feedback requirements for efficient laparoscopic grasp control

et al. 2009

View full text Add to dashboard Cite

During laparoscopic grasping, tissue damage may occur due to use of excessive grasp forces and tissue slippage, whereas in barehanded grasping, humans control their grasp to prevent slippage and use of excessive force (safe grasp). This study investigates the differences in grasp control during barehanded and laparoscopic lifts. Ten novices performed lifts in order to compare pinch forces under four conditions: barehanded; using tweezers; a low-efficient grasper; and a high-efficient grasper. Results showed that participants increased their pinch force significantly later during a barehanded lift (at a pull-force level of 2.63 N) than when lifting laparoscopically (from pull-force levels of 0.77 to 1.08 N). In barehanded lifts all participants could accomplish a safe grasp, whereas in laparoscopic lifts excessive force (up to 7.9 N) and slippage (up to 38% of the trials) occurred frequently. For novices, it can be concluded that force feedback (additional to the hand-tool interface), as in skin-tissue contact, is a prerequisite to maintain a safe grasp. Much is known about grasp control during barehanded object manipulation, especially the control of pinch forces to changing loading, whereas little is known about force perception and grasp control during tool usage. This knowledge is a prerequisite for the ergonomic design of tools that are used to manipulate objects.

show abstract

“…In tissue manipulation, inability to control these forces is associated with slippage of the tissue if the pinching forces are too low, and with damage to delicate tissue if the forces are too high [1,6]. The surgeon usually senses the magnitudes of applied forces peripherally via mechanoreceptors in the skin and muscles [5,7].…”

mentioning

confidence: 99%

Friction dynamics of trocars

2006

Self Cite

View full text Add to dashboard Cite

For some trocars, friction can be as great as the forces associated with instrument-tissue interaction. At movement reversals, friction fluctuates due to deformations of the rubber and silicon parts of the sealing mechanism. Such high variance can deteriorate surgical performance during high precision tasks (e.g., tissue manipulation) that typically involve many changes in movement direction. Comparisons of the investigated trocars indicate that the friction magnitude and variance can be reduced easily by changing the properties of the sealing cap or by lubricating the instruments.

show abstract

Inter- and intraindividual variabilities of perforation forces of human and pig bowel tissue

Abstract: The strength of the pig bowel is approximately comparable to the strength of the human bowel, and, therefore, testing of graspers on pig bowel is justified. However, due to the large interindividual variation, large safety margins should be taken into account.

Cited by 43 publications

References 13 publications

Slip and damage properties of jaws of laparoscopic graspers

Slip and damage properties of jaws of laparoscopic graspers

Force feedback requirements for efficient laparoscopic grasp control

Friction dynamics of trocars

Contact Info

Product

Resources

About