The PROEF diet--a new postoperative regimen for oral early feeding. Early feeding after cesarean: randomized trial. Safety and efficacy of early postoperative solid food consumption after cesarean section. Postoperative management of cesarean patients: the effect of immediate feeding on the incidence of ileus. Immediate postoperative oral hydration after caesarean section.
The purpose of this study was to determine if immediate postoperative feeding of a new oral elemental diet (PROEF diet) would be tolerated by patients and to determine its effect on gastrointestinal function after cesarean section.
                One hundred eighteen patients undergoing cesarean section were randomly assigned by a computer-generated list of numbers to receive either the PROEF diet (60 patients) or routine postoperative dietary management (58 patients). Gastrointestinal morbidity was analyzed by an independent-samples t test.
                The PROEF diet group has a more rapid return of normal bowel sounds, 10.3 versus 14.5 hours (p = 0.001), and earlier acceptance of a regular diet, 2.0 versus 2.3 days (p = 0.008).
                The PROEF diet was well tolerated in cesarean section patients with no increase in gastrointestinal morbidity when compared with a control group of patients. This dispels the classic teaching that postoperative patients may not have oral intake until the return of normal bowel function. Further study is necessary to support the theoretic benefits that may accrue from early feeding of an elemental diet. To study the rate of ileus symptoms and hospital course of women who are offered solid food shortly after cesarean delivery.
                This study involved women delivered by cesarean under regional anesthesia. Exclusion criteria included general anesthesia, magnesium sulfate, intra-operative bowel injury or bowel surgery, or other conditions that precluded early feeding. Early-fed women were offered regular diets within 8 hours of surgery, and controls were given nothing by mouth for 12-24 hours, advanced to clear liquids on the first postoperative day, and then given solid food on the second or third postoperative day.
                Sixty women were assigned randomly to each method. Early-fed women received solid food sooner after surgery, 5.0 +/- 1.2 hours versus 40.0 +/- 10.6 hours. The incidences of mild ileus symptoms and postoperative complications were similar in both groups; however, the study did not have an adequate sample size to definitively assess safety concerns. Women in the early-fed group had shorter hospital stays (49.5 +/- 12.7 hours versus 75.0 +/- 12.3 hours, P <.001), and shorter time intervals from surgery to bowel movement, 34.5 hours (interquartile range 25.3-48.8) versus 51.0 (43.3-62.0) hours, P <.001. In the early-fed group, women whose operative times exceeded 40 minutes were more likely to have symptoms of mild ileus.
                Early initiation of solid food after cesarean delivery appears to be well tolerated and may be associated with a shorter hospital stay. Early-fed women whose operations exceed 40 minutes may be more likely to have mild ileus symptoms. Traditionally patients have received a physician-dictated regimen of gradual expansion of their diets following cesarean section. This has been based upon concern about the possibility of ileus from expanding the diet too rapidly. Given the economic necessity of earlier postoperative discharge following abdominal delivery, many patients have solid food reintroduced in their diets around the time they leave the hospital. This prospective, randomized, controlled study compared a traditional, gradual dietary expansion scheme with patient-determined reintroduction of solid food, which was offered within eight hours of surgery. The hypotheses were that women would eat more rapidly after cesarean section when given the opportunity and that early solid food consumption would reduce the need for analgesia. The results indicated that both hypotheses were correct. Given the opportunity, women will eat solid food very soon after cesarean section (mean +/- SD 10.2 +/- 5.2 hours from surgery to onset of solid food consumption) as compared to women on a traditional dietary expansion regimen (mean +/- SD 41.5 +/- 16.0 hours, P < .001). Women offered food within hours of cesarean section required less patient-requested injectable narcotic postoperatively than did women on gradual dietary expansion (median, 75 mg versus 225 mg meperidine, P < .05). There was no evidence of compromise of safety or comfort from introducing solid food early and allowing the patient to decide when to eat postoperatively. The conclusion from these data is that early postoperative feeding after cesarean section is a safe and effective alternative for most women, who now face early hospital discharge. To evaluate the effect of immediate feeding on gastrointestinal function in patients undergoing cesarean delivery.
                A prospective study was conducted in which patients were randomized to one of two groups, either early feeding or delayed feeding, ie, feeding according to the institution's current protocol. Questionnaires were filled out by the subjects on the day of discharge. Fisher exact test was used to compare the two groups with respect to the type of anesthetic used and to compare the incidence of gastrointestinal symptoms. A one-sided exact binomial confidence interval was used to determine the upper bound of the likelihood of paralytic ileus. Logistic regression analysis was used to evaluate the presence of ileus symptoms when controlling for the type of anesthetic used.
                There were no significant differences between the control and study groups. There was no significant difference in the number of gastrointestinal symptoms between the two groups. The incidence of postoperative paralytic ileus was zero in both the study and control groups.
                Routine early feeding of subjects undergoing cesarean delivery can be implemented without an increase in gastrointestinal symptoms or paralytic ileus. A study was carried out to assess the effects of immediate postoperative oral rehydration in 51 unpremedicated women undergoing caesarean section under epidural anesthesia. The patients were randomly assigned to 2 groups: group 1 (n = 22)--fasting at least until 24 hours after the end of the operation, and group 2 (n = 29)--receiving immediate oral intake of fluids (water, tea or coffee with sugar) without limitation of quantity. The 2 groups were compared for the occurrence of postoperative nausea and vomiting, onset of peristalsis, rectal gas emission, first bowel movement, and possible complications. The results demonstrate no significant differences between the parturients who drank immediately postoperatively as compared to those in whom oral fluid intake was delayed for 24 hours or more. It is concluded that immediate postoperative oral rehydration had no harmful effect upon peristalsis post-caesarean section.
There was no evidence from the limited randomised trials reviewed, to justify a policy of withholding oral fluids after uncomplicatedcaesarean section. Further research is justified.