PT  - JOURNAL ARTICLE
AU  - Yohei Oshima
AU  - Susumu Sato
AU  - Toyofumi F. Chen-Yoshikawa
AU  - Yuji Yoshioka
AU  - Nana Shimamura
AU  - Ryota Hamada
AU  - Manabu Nankaku
AU  - Akira Tamaki
AU  - Hiroshi Date
AU  - Shuichi Matsuda
TI  - Quantity and quality of antigravity muscles in patients undergoing living-donor lobar lung transplantation: 1-year longitudinal analysis using chest computed tomography images
AID  - 10.1183/23120541.00205-2019
DP  - 2020 Apr 01
TA  - ERJ Open Research
PG  - 00205-2019
VI  - 6
IP  - 2
4099  - http://openres.ersjournals.com/content/6/2/00205-2019.short
4100  - http://openres.ersjournals.com/content/6/2/00205-2019.full
SO  - erjor2020 Apr 01; 6
AB  - Background Skeletal muscle dysfunction is a common feature in patients with severe lung diseases. Although lung transplantation aims to save these patients, the surgical procedure and disuse may cause additional deterioration and prolonged functional disability. We investigated the postoperative course of antigravity muscle condition in terms of quantity and quality using chest computed tomography.Methods 35 consecutive patients were investigated for 12 months after living-donor lobar lung transplantation (LDLLT). The erector spinae muscles (ESMs), which are antigravity muscles, were evaluated, and the cross-sectional area (ESMCSA) and mean attenuation (ESMCT) were analysed to determine the quantity and quality of ESMs. Functional capacity was evaluated by the 6-min walk distance (6MWD). Age-matched living donors with lower lobectomy were evaluated as controls.Results Recipient and donor ESMCSA values temporarily decreased at 3 months and recovered by 12 months post-operatively. The ESMCSA of recipients, but not that of donors, surpassed baseline values by 12 months post-operatively. Increased ESMCSA (ratio to baseline ≥1) may occur at 12 months in patients with a high baseline ESMCT. Although the recipient ESMCT may continuously decrease for 12 months, the ESMCT is a major determinant, in addition to lung function, of the postoperative 6MWD at both 3 and 12 months.Conclusion The quantity of ESMs may increase within 12 months after LDLLT in recipients with better muscle quality at baseline. The quality of ESMs is also important for physical performance; therefore, further approaches to prevent deterioration in muscle quality are required.The quantity of antigravity muscles in patients undergoing lung transplantation (LTx) will increase within 1 year after LTx. The quality of muscles is important for increase of muscle quantity as well as physical performance. https://bit.ly/3bItfB9