PDF herunterladen
Facial Plast Surg 2015; 31(03): 295-300
DOI: 10.1055/s-0035-1555623
Rapid Communication
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Handheld-Level Electromechanical Cartilage Reshaping Device

Sehwan Kim
1   Department of Biomedical Engineering, College of Medicine, Dankook University, Cheonan-si, Chungnam, Republic of Korea
2   Beckman Laser Institute Korea, Dankook University, Republic of Korea
,
Cyrus T. Manuel
3   Department of Otolaryngology-Head and Neck Surgery, University of California Irvine, Orange, California, USA
,
Brian J. F. Wong
3   Department of Otolaryngology-Head and Neck Surgery, University of California Irvine, Orange, California, USA
4   Beckman Laser Institute and Medical Clinic, University of California, Irvine, California, USA
,
Phil-Sang Chung
2   Beckman Laser Institute Korea, Dankook University, Republic of Korea
5   Department of Otorhinolaryngology, College of Medicine, Dankook University, Cheonan-si, Chungnam, Republic of Korea
,
Ji-Hun Mo
2   Beckman Laser Institute Korea, Dankook University, Republic of Korea
5   Department of Otorhinolaryngology, College of Medicine, Dankook University, Cheonan-si, Chungnam, Republic of Korea
› Institutsangaben
Weitere Informationen

Publikationsverlauf

Publikationsdatum:
30. Juni 2015 (online)

    Lizenzen und Reprints

Abstract

We have developed a handheld-level multichannel electromechanical reshaping (EMR) cartilage device and evaluated the feasibility of providing a means of cartilage reshaping in a clinical outpatient setting. The effect of EMR on pig costal cartilage was evaluated in terms of shape change, tissue heat generation, and cell viability. The pig costal cartilage specimens (23 mm × 6.0 mm × 0.7 mm) were mechanically deformed to 90 degrees and fixed to a plastic jig and applied 5, 6, 7, and 8 V up to 8 minutes to find the optimal dosimetry for the our developed EMR device. The results reveal that bend angle increased with increasing voltage and application time. The maximum bend angle obtained was 70.5 ± 7.3 at 8 V, 5 minutes. The temperature of flat pig costal cartilage specimens were measured, while a constant electric voltage was applied to three pairs of electrodes that were inserted into the cartilages. The nonthermal feature of EMR was validated by a thermal infrared camera; that is, the maximum temperate of the flat cartilages is 20.3°C at 8 V. Cell viability assay showed no significant difference in cell damaged area from 3 to 7 minutes exposure with 7 V. In conclusion, the multichannel EMR device that was developed showed a good feasibility of cartilage shaping with minimal temperature change.

Keywords

electromechanical reshaping - multichannel EMR - cartilage reshaping - facial cartilage
 

  • References

  • 1 Wu EC, Sun V, Manuel CT , et al. Ex vivo investigations of laser auricular cartilage reshaping with carbon dioxide spray cooling in a rabbit model. Lasers Med Sci 2013; 28 (6) 1475-1482
    CrossrefPubMedGoogle Scholar
  • 2 Leclère FMP, Petropoulos I, Mordon S. Laser-assisted cartilage reshaping (LACR) for treating ear protrusions: a clinical study in 24 patients. Aesthetic Plast Surg 2010; 34 (2) 141-146
    CrossrefPubMedGoogle Scholar
  • 3 Keefe MW, Rasouli A, Telenkov SA , et al. Radiofrequency cartilage reshaping: efficacy, biophysical measurements, and tissue viability. Arch Facial Plast Surg 2003; 5 (1) 46-52
    CrossrefPubMedGoogle Scholar
  • 4 Manuel CT, Foulad A, Protsenko DE, Sepehr A, Wong BJ. Needle electrode-based electromechanical reshaping of cartilage. Ann Biomed Eng 2010; 38 (11) 3389-3397
    CrossrefPubMedGoogle Scholar
  • 5 Manuel CT, Foulad A, Protsenko DE, Hamamoto A, Wong BJ. Electromechanical reshaping of costal cartilage grafts: a new surgical treatment modality. Laryngoscope 2011; 121 (9) 1839-1842
    PubMedGoogle Scholar
  • 6 Badran K, Manuel C, Waki C, Protsenko D, Wong BJ. Ex vivo electromechanical reshaping of costal cartilage in the New Zealand white rabbit model. Laryngoscope 2013; 123 (5) 1143-1148
    CrossrefPubMedGoogle Scholar
  • 7 Oliaei S, Manuel C, Karam B , et al. In vivo electromechanical reshaping of ear cartilage in a rabbit model: a minimally invasive approach for otoplasty. JAMA Facial Plast Surg 2013; 15 (1) 34-38
    CrossrefPubMedGoogle Scholar
  • 8 Yau AY, Manuel C, Hussain SF, Protsenko DE, Wong BJ. In vivo needle-based electromechanical reshaping of pinnae: New Zealand White rabbit model. JAMA Facial Plast Surg 2014; 16 (4) 245-252
    CrossrefPubMedGoogle Scholar
  • 9 Wu EC, Protsenko DE, Khan AZ, Dubin S, Karimi K, Wong BJF. Needle electrode-based electromechanical reshaping of rabbit septal cartilage: a systematic evaluation. IEEE Trans Biomed Eng 2011; 58 (8) 2378-2383
    CrossrefPubMedGoogle Scholar