Quantitative assessment of Thiel soft-embalmed human cadavers using shear wave elastography

Joy, Joyce; McLeod, Graeme; Lee, Nhan; Munirama, S.; Corner, George; Eisma, Roos; Cochran, Sandy

doi:10.1016/j.aanat.2015.06.007

Cited by 30 publications

(29 citation statements)

References 27 publications

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“…These remarkable physical properties can be attributed to the retention of elasticity during the embalming process. Young's modulus over nerves and soft tissue is similar to that measured in humans . Fascial planes distend in response to fluid injection and return to pre‐injection dimensions, dispersing fluid along tissue planes and permitting repeated injection with little if any change in anatomy.…”

Section: Discussionsupporting

confidence: 59%

An initial evaluation of the effect of a novel regional block needle with tip‐tracking technology on the novice performance of cadaveric ultrasound‐guided sciatic nerve block

et al. 2019

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Summary Visibility of the needle tip is difficult to maintain during ultrasound‐guided nerve block. A new needle has been developed that incorporates a piezo element 2–2.3 mm from the tip, activated by ultrasound. The electrical signal manifests as a coloured circle surrounding the needle tip, and allows real‐time tracking. We hypothesised that novice regional anaesthetists would perform nerve block better with the tracker turned on rather than off. Our primary objective was to evaluate the new needle by measuring the performance of novice anaesthetists conducting simulated sciatic block on the soft embalmed Thiel cadaver. Training consisted of a lecture, scanning in volunteers and practice on cadavers. Testing entailed scanning the sciatic nerve of a cadaver and conducting 20 in‐plane sciatic blocks in the mid‐to‐upper thigh region. Subjects were randomised equally, in groups of five, according to the sequence: tracker on/off/on/off; or tracker off/on/off/on. Video recordings were assessed by six raters for steps performed correctly and errors committed. Eight subjects were recruited and 160 videos were analysed. Using the tracking needle, five correct steps improved and one error reduced. The benefits included: better identification of the needle tip before advancing the needle, OR (95%CI) 3.4 (1.6–7.7; p < 0.001); better alignment of the needle to the transducer, 3.1 (1.3–8.7; p = 0.009); and better visibility of the needle tip 3.0 (1.4–7.3; p = 0.005). In conclusion, use of the tracker needle improved the sciatic block performance of novices on the soft embalmed cadaver.

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Section: Discussionsupporting

confidence: 59%

An initial evaluation of the effect of a novel regional block needle with tip‐tracking technology on the novice performance of cadaveric ultrasound‐guided sciatic nerve block

et al. 2019

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“…For this reason, Young's modulus is different from that of living human skin, though the exact difference could not be measured. Joy et al demonstrated a 15.0 kPa Young's modulus of masseter muscle in cadavers, which is lower than reported measurements in live human tissue (31.0 kPa) . We expect that the higher Young's modulus in live tissue would result in weaker penetration of injected materials.…”

Section: Discussionmentioning

confidence: 57%

Investigating skin penetration depth and shape following needle‐free injection at different pressures: A cadaveric study

Seok

Kwon

et al. 2016

Lasers Surg Med

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When injecting material into the skin using a pneumatic needle-free injector, higher-pressure injections result in a hole with smaller area than lower-pressure injections. The depth and shape of skin penetration vary according to the amount of pressure applied. For materials of low density and viscosity, there is a greater difference in penetration depth according to the degree of pressure. Lasers Surg. Med. 48:624-628, 2016. © 2016 Wiley Periodicals, Inc.

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“…For their part, Joy et al (2015) made a comparative quantitative evaluation with Young's modulus of the properties of Thiel-preserved tissues using shear wave elastography. The result was that the elasticity of the different tissues was similar in Thiel soft-embalmed cadavers and living humans.…”

Section: Authorsmentioning

confidence: 99%

Walter Thiel's Embalming Method: Review of Solutions and Applications in Different Fields of Biomedical Research

et al. 2016

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's embalming method. Review of solutions and applications in different fields of biomedical research. Int. J. Morphol., 34(4):1442Morphol., 34(4): -1454Morphol., 34(4): , 2016. SUMMARY:Walter Thiel developed the method that enables preservation of the body with natural colors in 1992. It consists in the application of an intravascular injection formula, and maintaining the corps submerged for a determinate period of time in the immersion solution in the pool. After immersion, it is possible to maintain the corps in a hermetically sealed container, thus avoiding dehydration outside the pool. The aim of this work was to review the Thiel method, searching all scientific articles describing this technique from its development point of view, and application in anatomy and morphology teaching, as well as in clinical and surgical practice. Most of these studies were carried out in Europe. We used PubMed, Ebsco and Embase databases with the terms "Thiel cadaver", "Thiel embalming", "Thiel embalming method" and we searched for papers that cited Thiel`s work. In comparison with methods commonly used with high concentrations of formaldehyde, this method lacks the emanation of noxious or irritating gases; gives the corps important passive joint mobility without stiffness; maintaining color, flexibility and tissue plasticity at a level equivalent to that of a living body. Furthermore, it allows vascular repletion at the capillary level. All this makes for great advantage over the formalinfixed and fresh material. Its multiple uses are applicable in anatomy teaching and research; teaching for undergraduates (prosection and dissection) and for training in surgical techniques for graduates and specialists (laparoscopies, arthroscopies, endoscopies).

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Quantitative assessment of Thiel soft-embalmed human cadavers using shear wave elastography

Cited by 30 publications

References 27 publications

An initial evaluation of the effect of a novel regional block needle with tip‐tracking technology on the novice performance of cadaveric ultrasound‐guided sciatic nerve block

An initial evaluation of the effect of a novel regional block needle with tip‐tracking technology on the novice performance of cadaveric ultrasound‐guided sciatic nerve block

Investigating skin penetration depth and shape following needle‐free injection at different pressures: A cadaveric study

Walter Thiel's Embalming Method: Review of Solutions and Applications in Different Fields of Biomedical Research

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