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Arquivos Internacionais de Otorrinolaringologia 2011; 15(03): 346-349
DOI: 10.1590/S1809-48722011000300013
Original Article
Thieme Publicações Ltda Rio de Janeiro, Brazil

Evaluation of the ultrasound reproducibility as a method to measure the subcutaneous tissue of the nasal tip

Avaliação da reprodutibilidade ultrassonográfica como método para medida do tecido subcutâneo da ponta nasal
Marcell de Melo Naves
1   Doctor. Otorhinolaryngology Department of the Federal University of Uberlândia's Medical School.
,
Rogério Costa Sousa
1   Doctor. Otorhinolaryngology Department of the Federal University of Uberlândia's Medical School.
,
Raphael Alves Ferreira Tomé
2   Doctor. Radiology Deparment of the Federal University of Uberlândia's Medical School.
,
Nicholas Godoy Canazza Damian
2   Doctor. Radiology Deparment of the Federal University of Uberlândia's Medical School.
,
Angélica Lemos Debs Diniz
3   Professor Doctor. Radiology Deparment of the Federal University of Uberlândia's Medical School.
,
Lucas Gomes Patrocinio
4   Professor Doctor. Head of the Deparment of Junior Doctors in Otorhinolaryngology of the Federal University of Uberlândia's Medical School.
› Author Affiliations
Further Information

Publication History

28 April 2011

25 June 2011

Publication Date:
12 February 2014 (online)

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Summary

Introduction: The previous evaluation of the patient's anatomy is crucial to achieve a sharp nasal tip in a rhinoplasty. The thickness of the subcutaneous tissue is indispensable for the esthetical harmony of the area. Techniques to measure such structures on the patient 'in vivo' are not found in literature.

Objective: Evaluate the inter-observer inconsistency of the ultrasound method to measure the thickness of the subcutaneous tissue of the nasal tip by way of an ultrasound.

Method: 47 volunteers were submitted to a nasal tip ultrasound performed by two radiology specialists, who used the same exam technique with a linear electronic transducer at a frequency between 5 and 9 MHz. The thickness of the subcutaneous tissue was evaluated by measuring the point with the highest protrusion of the largest alar cartilage dome towards skin. Prospective study.

Results: The measurement averages of the subcutaneous tissue of the nasal tip achieved by the examiners did not show statistically significant differences (p = 0.5303). When analyzing the reproducibility between examiners, an interclass 'r'correlation coefficient (Pearson) 0.9333, i.e., an excellent inter-observer reproducibility was found.

Conclusion: The ultrasound proved to be reproducible and examiners satisfactorily agree about evaluating the thickness of the subcutaneous tissue of the skin, thus helping the surgeon perform the pre-surgical analysis and find the best surgical technique for each case.

Resumo

Introdução: A prévia avaliação da anatomia do paciente é fundamental para atingir uma ponta nasal bem definida em rinoplastia. A espessura do tecido subcutâneo é essencial para a harmonia estética dessa região. Técnicas de mensuração dessas estruturas no paciente “in vivo” não estão padronizadas na literatura.

Objetivo: Avaliar a variabilidade interobservador do método ultrassonográfico para medida da espessura do tecido subcutâneo da ponta nasal por de ultrasonografia.

Método: 47 voluntários submeteram-se a ultrasonografia da ponta nasal por dois especialistas em radiologia que utilizaram a mesma técnica de exame com transdutor eletrônico linear na frequência de 5 a 9 MHz. Avaliou-se a espessura do tecido subcutâneo através da medida do ponto de maior projeção do domo da cartilagem alar maior até a pele. Estudo prospectivo.

Resultados: As médias das medidas do tecido subcutâneo da ponta nasal obtidas pelos examinadores não apresentaram diferenças estatisticamente significante (p = 0.5303). Na análise da reprodutibilidade entre examinadores encontrou-se coeficiente de correlação interclasse r (Pearson) 0,9333, isto é, uma excelente reprodutibilidade interobservadores.

Conclusão: A ultrassonografia demonstrou-se reprodutível e excelente concordância entre os examinadores para avaliação da espessura do tecido subcutâneo da pele, auxiliando o cirurgião na análise pré-operatória do paciente e na escolha da melhor técnica cirúrgica para cada caso.

Keywords

rhinoplasty - nasal cartilages - ultrasound

Palavras-chave

rinoplastia - cartilagens nasais - ultrassonografia
 

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