Abdominal computed tomography demonstrating the “whirlpool sign” over the jejunal branches of the superior mesenteric vessels (asterixis) with the feeding jejunostomy tube in place (arrows). In fact, if we conducted POCUS immediately after the physical examination, as an extension of the physical examination, we could obtain the final diagnosis faster without waiting for laboratory tests and symptom relief. This is where the real usefulness of POCUS lies—in speeding up diagnosis and management. Owing to how crowded and busy the emergency department is, many physicians order laboratory studies just after taking patient history and conducting physical examinations without POCUS. If the patient does not have a peritoneal sign and laboratory tests are not abnormal, physicians will screen for abdominal pain. If any of the above changes or abdominal pain persists or worsens, the physicians will arrange an abdominal CT for further confirmation. Abdominal CT has been shown to reduce early return visits [26]. However, if a patient suffers from a vascular emergency such as superior mesenteric artery dissection [27] or abdominal aortic aneurysm [28], “waiting for the laboratory tests” will result in a disaster, due to interventions being delayed. Moreover, abdominal pain is the leading presenting symptom, which accounts for 31% of the symptoms among patients who spend >4 h in the ED [29]. If we perform POCUS immediately after taking the patient’s history and conducting a physical examination, we will obtain the impression earlier, and it will help us to obtain the correct disposition faster. Moreover, it will help to create more order in the emergency department. It may help to relieve overcrowding in the ED and decrease inpatient mortality, the length of stay, and the costs for the admitted patients [30]. However, there is still no direct evidence for this. In the literature, there is only evidence that POCUS could reduce the disposition time in patients with dyspnea [31] and deep vein thrombosis [32]. Feeding jejunostomy is a common surgical procedure for enteral nutrition. However, complications that require re-exploration and that can be life-threatening may develop. Common complications include tube dislocation, abdominal wall or intra-abdominal infection, gastrointestinal symptoms, bowel necrosis, pneumatosis intestinalis [33], fluid and electrolyte imbalances [34], enteral migration [35], and intussusception [36]. Small-bowel volvulus, which refers to the torsion of the alimentary tract, is a rare complication of changing the jejunostomy tube [33,37]. A patient with volvulus may present with abdominal pain, abdominal distension, constipation, nausea, or vomiting. The characteristics of whirlpool signs (mesenteric vessels that have a whirling or spiral shape) can be detected via POCUS [38] or CT. Although abdominal CT is considered the optimal tool for diagnosis [39], POCUS can detect specific and dynamic signs of small-bowel volvulus [38] with no radiation, contrast exposure, lesser expenses, and higher availability. Patients who present with small-bowel volvulus should obtain immediate surgical consultations. If left untreated, it may eventually lead to catastrophic bowel ischemia, necrosis, and perforation [40]. Our case illustrates that abdominal pain immediately after jejunostomy tube insertion is a sign of life-threatening iatrogenic small-bowel volvulus with a characteristic “whirlpool sign”, which may be detected by POCUS. The pain may be mimicked by benign colic or traction pain caused by the tube. If we performed POCUS as an extension of the physical examination, we would obtain the final diagnosis faster. In addition to the utilization of POCUS in ED patients with abdominal pain, this review identified whether POCUS could reduce the disposition time, length of stay in the ED, and number of return visits for patients with abdominal pain in the ED, as an area for potential policy research and future exploration.