Critical view arithmetic, groin vessels and nerves, thyroid preservation, and watershed discipline

(A) Open with the Strasberg baseline: laparoscopic injury 0.3 to 0.8 percent against open 0.2 percent, and the Italian 604-patient split — view non-use 54.6 percent where injury or bleeding occurred against 25.8 percent without events.^[1] Price the variants before clipping the small artery: conventional anatomy only 86.15/89.02 percent with duplicate cystic 7.18 percent and hump 6.26 percent; right hepatic origin 85.75 percent with single artery 88.59 percent; Moynihan's hump 3.81 percent overall.^[2][3][4] Classify any aberrant right hepatic duct: high-risk in 2.2 percent with a quarter needing subtotal resection — recognised variants finish without injury.^[5] Close consent with the Czech register: 76,345 electives, 186 major injuries at 0.24 percent, open 1.28 percent against laparoscopic 0.06 percent.^[7]

(B) Recite the layer: the defect lives only in transversus abdominis — deep ring, iliopubic tract, transversus arch, femoral sheath, Cooper's ligament.^[8] Triple-source the corona: CTA arterial 32.2 percent at 2.40 mm median; TEP endoscopy either-vessel 40 percent; in-vivo TEP arterial 28.4 percent with 1.5 percent tack injuries through thin vessels — staple Cooper's near the symphysis.^[9][11][13] Place the nerves: ilioinguinal in the Lichtenstein field, iliohypogastric cranial between obliques, genitofemoral beneath the cord — frequent fusion.^[12] Monitor the thyroid nerve: paralysis 2.0 against 10.0 percent randomised, pooled transient odds ratio 0.62 and permanent 0.49 — then stay honest on calcium: grafting gives no recovery advantage with 38.0 against 19.3 percent transient hypocalcaemia, while autofluorescence cuts hypocalcaemia from 21.7 to 9.1 percent.^{[14][15][16][17]}

(C) Excise in the envelope: Dutch 12-year local recurrence 5 against 11 percent with stage-III margin-negative survival 50 against 40 percent, and the national plane effect from 16 to 9 percent.^[20][21] Respect the watersheds: marginal artery absent in up to 18 percent at flexure and rectosigmoid, median 50 percent flow fall after ligation with no 5-day recovery, Sudeck anastomosis absent in 4.7 percent at 1.9 mm.^[22][24][25] Default the appendix retrocaecal at 35.98 and 26.9 percent with the perforation signal; restrain the axilla per Z0011 with 86.3 against 83.6 percent survival and nodal recurrence 0.5 against 1.5 percent.^{[26][27][28][29]} Treat cushions as vascular — 35 against 10 cm of water with identical sphincter thickness — and spare the dentate line for 3.0 against 7.8 percent recurrence; ligate the right colon centrally knowing ileocolic 99.7, right colic 72.6 and middle colic 96.9 percent with right colic absent in 27.4 percent.^[32][33][34]