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Errors in Taping

Errors in Taping

Errors in taping arise from multiple factors that can significantly impact measurement accuracy in surveying. Misalignment of the tape, often due to human error, is one primary source. A skilled rear tapeman, using a telescope, can help correct alignment by guiding the head tapeman; however, human limitations still lead to small inaccuracies. These errors may include misplacement of pins or inaccurate tape readings due to common visual confusions, such as mistaking a six for a nine. Such...

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Assessing Tissue Damage Around a Tape Spring Steerable Needle With Sharp Turn Radii.

Omar T Abdoun¹, Mark Yim²

¹Department of Bioengineering and The Perelman School of MedicineUniversity of Pennsylvania Philadelphia PA 19104 USA.

IEEE Open Journal of Engineering in Medicine and Biology

|March 6, 2024

Summary

A novel tape spring steerable needle minimizes tissue damage during medical procedures. This innovative design offers improved steering capabilities and reduced harm compared to existing steerable needle technologies.

Keywords:

Interventional radiology minimally invasive steerable catheter steerable needle tape spring

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Area of Science:

Medical Devices
Surgical Technology
Biomedical Engineering

Background:

Steerable needles offer advanced capabilities for medical diagnostics and therapeutics.
Existing steerable needle designs face limitations in maneuverability and cause significant tissue damage.

Purpose of the Study:

To introduce and evaluate a novel tape spring steerable needle design.
To assess the needle's turning radius, steering ability in biological tissue, and potential for minimizing tissue damage.

Main Methods:

In vitro testing of the steerable needle's turning radius in porcine liver tissue using ultrasound.
Estimation of tissue damage in gel blocks via image analysis and 3D plaster casting.
Comparison of tissue damage with existing steerable needle designs.

Main Results:

The novel steerable needle demonstrated effective steering through biological tissue.
The new design exhibited reduced tissue damage compared to similar existing technologies.
Tissue stiffness was identified as a protective factor, mitigating tissue damage.

Conclusions:

The tape spring steerable needle represents a promising advancement in minimally invasive medical technology.
This design overcomes limitations of previous steerable needles, offering enhanced safety and efficacy.
Further research into tissue-tissue interactions and needle design optimization is warranted.