Risk factors for reduced postoperative fecal output in horses: 37 cases (1997-1998).

The research investigates the prevalence of reduced postoperative fecal output (RPFO) or ileus in horses after surgery that’s unrelated to the gastrointestinal tract. The study suggests that older horses undergoing long orthopedic procedures without receiving post-operative phenylbutazone are at higher risk of developing RPFO, which could lead to postoperative colic issues.

Research Method and Participants

• The study is retrospective in nature, based on data from past medical records rather than a controlled experiment.
• It focuses on 37 horses that showed signs of RPFO after going through general anesthesia for surgical reasons unrelated to their gastrointestinal tract.
• For the purpose of this study, RPFO was defined as having equal to or less than three defecations in a 24-hour period following surgery.
• The control group, or reference population, comprised 48 horses that defecated four or more times within the same duration.

Variables Considered

• Various demographic, clinical, and surgical variables were taken into account for the study.
• These variables were evaluated for their potential association with the development of RPFO using logistic regression analysis.

Key Findings

• Results showed that 10 of the 37 horses (approximately 12%) developed signs of colic after undergoing surgery.
• All these horses exhibited RPFO after surgery.
• Specifically, horses aged five years or older that underwent orthopedic surgeries lasting longer than 60 minutes and did not receive phenylbutazone after surgery were found to be at high risk of developing RPFO.

Importance of the Research

• The research highlights an intermediate clinical phase characterized by reduced fecal output that precedes clear signs of colic post-surgery.
• The ability to identify and understand the occurrence of RPFO could help in reducing potential morbidity and mortality risks in horses following surgery.