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Senna vs Polyethylene Glycol for Mechanical Preparation the Evening Before Elective Colonic or Rectal Resection
A Multicenter Controlled Trial
Alain Valverde, MD;
Jean-Marie Hay, MD;
Abe Fingerhut, MD;
Marie-Jeanne Boudet, MD;
Roberta Petroni, MD;
Xavier Pouliquen, MD;
Simon Msika, MD;
Yves Flamant, MD;
for the French Association for Surgical Research
Arch Surg. 1999;134:514-519.
Hypothesis Senna is more efficient than polyethylene glycol as mechanical preparation before elective colorectal surgery.
Design Prospective, randomized, single-blind study.
Setting Multicenter study (18 centers).
Patients Five hundred twenty-three consecutive patients with colonic or rectal carcinoma or sigmoid diverticular disease, undergoing elective colonic or rectal resection followed by immediate anastomosis.
Intervention Two hundred sixty-two patients were randomly allotted to receive senna (1 package diluted in a glass of water) and 261 to receive polyethylene glycol (2 packages diluted in 2-3 L of water), administered the evening before surgery. All patients received 5% povidone iodine antiseptic enemas (2 L) the evening and the morning before surgery. Ceftriaxone sodium and metronidazole were given intravenously at anesthetic induction.
Main Outcome Measures Degree of colonic and rectal cleanliness.
Results Colonic cleanliness was better (P=.006), fecal matter in the colonic lumen was less fluid (P=.001), and the risk for moderate or large intraoperative fecal soiling was lower (P=.11) with senna. Overall, clinical tolerance did not differ significantly between groups, but 20 patients receiving polyethylene glycol (vs 16 with senna) had to interrupt their preparation, and 15 patients (vs 8 with senna) complained of abdominal distension. Senna, however, was better tolerated (P=.03) in the presence of stenosis. There was no statistically significant difference found in the number of patients with postoperative infective complications (14.7% vs 17.7%) or anastomotic leakage (5.3% vs 5.7%) with senna and polyethylene glycol, respectively.
Conclusion Mechanical preparation before colonic or rectal resection with senna is better and easier than with polyethylene glycol and should be proposed in patients undergoing colonic or rectal resection, especially patients with stenosis.
From the Departments of Surgery, Hôpital Louis Mourier, Colombes (Drs Valverde, Hay, Boudet, Msika, and Flamant), Centre Hospitalier Intercommunal, Poissy (Dr Fingerhut), Hôpital Tenon, Paris (Dr Petroni), and Hôpital Victor Dupouy, Argenteuil (Dr Pouliquen), France.
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