Pasien sakit kritis mengalami peningkatan laju atrofi otot yang memengaruhi keberhasilan ekstubasi. Pemeriksaan massa otot dengan alat tervalidasi terbatas karena instabilitas klinis, kesulitan transfer pasien, dll. Lingkar betis (LB) berkorelasi dengan hasil pemeriksaan massa otot tervalidasi, sederhana, dan efisien. Studi bertujuan mengetahui hubungan LB awal admisi dengan keberhasilan ekstubasi. Studi kohort prospektif melibatkan 65 subjek berusia 18−70 tahun, pengguna ventilasi mekanis di RSUPN dr. Cipto Mangunkusumo dan RS Universitas Indonesia. Pemantauan sejak admisi ICU hingga pasien ekstubasi atau maksimal 14 hari pasca intubasi. Subjek didominasi laki-laki (67,7%), rerata usia 48,2 ± 13,8 tahun, dan indeks massa tubuh 23,77 ± 6,30 kg/m2. Sebagian besar pasien bedah (81,5%) dan memiliki komorbiditas (81,5%). Durasi intubasi 43 jam (12-401). Rerata LB awal 32,8 ± 3,4 cm dan LB akhir 32,1 ± 3,6 cm, terdapat beda rerata -0,68 cm (p <0,001). Tidak ditemukan hubungan LB awal dengan keberhasilan ekstubasi (RR 1,23; IK 95%: 0,89−1,69, p = 0,199). Lingkar betis awal sebagai pemeriksaan untuk massa otot bukan prediktor keberhasilan ekstubasi. Analisis tambahan menemukan perbedaan rerata bermakna LB awal dan LB akhir yang diukur. Perubahan LB didapatkan perbedaan nilai bermakna antara kelompok berhasil ekstubasi dibandingkan sulit ekstubasi.

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Critically ill patients experience an increased rate of muscle atrophy that affects the success of extubation. Examination of muscle mass with validated tools is limited due to clinical instability, difficulty in patient transfer, etc. Calf circumference (LB) correlates with the results of a validated, simple and efficient muscle mass examination. The study aims to determine the relationship between initial LB admission and successful extubation. A prospective cohort study involving 65 subjects aged 18−70 years, users of mechanical ventilation at RSUPN dr. Cipto Mangunkusumo and University of Indonesia Hospital. Monitoring from ICU admission until the patient is extubated or a maximum of 14 days after intubation. Subjects were predominantly male (67.7%), mean age 48,2 ± 13,8 years, and body mass index 23,77 ± 6,30 kg/m2. Most of the patients were surgical (81,5%) and had comorbidities (81,5%). Duration of intubation 43 hours (12-401). The mean initial LB was 32,8 ± 3,4 cm and final LB 32,1 ± 3,6 cm, there was a mean difference of -0,68 cm (p <0.001). There was no association between early LB and extubation success (RR 1,23; 95% CI: 0,89−1,69, p = 0,199). Initial calf circumference as a test for muscle mass is not a predictor of successful extubation. Additional analysis found significant mean differences in initial LB and final LB measured. There was a significant difference in LB changes between the successful extubation group compared to the difficult extubation group.