I had the first half of my tracheo-cutaneous fistula closure surgery last week and I'm recovering steadily.
ーI had the first half of my tracheo-cutaneous fistula closure surgery last week and I'm recovering steadily.
「先週、一回目の気管孔閉鎖術を受け、順調に回復しています」
2回に分けて手術を行うとのことですので、1回目は the first half を使って表現できます。tracheo-cutaneous fistula closure surgery で「気管孔閉鎖術」
to recover steadily で「順調に回復する」
ご参考まで!