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Intussusception is defined as the telescoping of one a segment of the gastrointestinal tract into an adjacent one [1]. It was reported initially by Barbette of Amsterdam in 1674 [2]. Sir Jonath Hutchinson was the first to successfully operate on intussusception patients in 1871 [3]. Post-operative intussusception is defined as defined as acute intussusception occurring within 30 days of index surgery, is a recognized and well-described, on the other hand, an extremely rare clinical entity [4,5]. Adult intussusception is rare cause of intestinal obstruction [6]. It is usually caused by existing pathology such as tumor and sometimes the cause is idiopathic [7,8]. Preoperative diagnosis of intussusception is infrequent in adult population, secondary to varying presentations [9].

Since clinical presentation is often nonspecific, imaging is a vital role in the preoperative diagnosis of intussusception [10,11]. So physicians often do not suspect the presence of acute intussusception if the condition occurs in early post-operative period [12]. Therefore as in my case postoperative intussusception especially the first operation done for small bowel obstruction is very uncommon cause of immediate post-operative morbidity and the topic discussed is very helpful in the surgical world.

Case Presentation

A 40 years old patient presented to the emergency room with colicky type of central abdominal pain of 3 days. He had also abdominal distention, failure to pass feces and flatus and 2-3 episode of vomiting of bilious matter. For this complaint diagnosed with small bowel obstruction 2ry to volvulus and resuscitated with after 3 L of crystalloid fluid resuscitation, NG tube and catheter inserted and taken to operation room and operate. The intraoperative finding was 360° counter clock wise rotated distended small bowel, around 100 mL of reactive fluid inside general peritoneum, for which derotation and retrograde decompression was done.

He was in smooth post-operative course until 3rd day with stable vital signs after which he restarted to have central colicky type of He was in smooth post-operative course until 3rd day with stable vital signs after which he restarted to have central colicky type of

Physical examination

• General appearance-acutely sick looking

• Blood pressure-120/60, Pulse rate-82, Respiratory rate-24, Temperature-36.7°C

• HEENT-He had pink conjunctiva and non-icteric sclera.

• Chest-He had clear and good, comparable air entry on bilateral lung field.

• Cardiovascular system-S1 and S2 is well heard, there was no murmur or gallop.

• Abdomen-There was clean surgical scar

• Slightly distended abdomen, tympanic to percussion with shifting dullness.

• There was hyperactive bowel sound.

• Per-rectal examination-There was dried stool on examining finger, but no mass or bleeding per rectal examination.

• Genitourinary system-There was no costo-vertebral angle tenderness.

• Musculoskeletal system -There was no deformity or any edema.

• Integumentary system-There was no signs of palmar paler.

• Central nervous system -He was conscious and oriented.

• Assessment-SBO 2ry to Early post-operative adhesion R/O ileus

For the above assessment, NG tube inserted and the patient kept NPO and put on maintenance fluid and the following investigations were sent (Figure 1).

Figure 1: Picture of Erect abdominal X-ray Arrow shows multiple small bowel air fluid level.

Investigation on the 3rd post operative day results

Complete blood count

• White blood cells-6000 cells/mm³,

• Hemoglobin-11 mg/dL,

• Neutrophil-79%

Serum electrolyte

• K⁺ 3.59 mmol/L,

• Na⁺ 145.3 mmol/L,

• Cl^- 109.8 mmol/L,

• iCa⁺⁺ 1.06 mmol/L,

• Serum Albumin-4 g/dL,

• Urea - 36.1 mg/dL,

• Creatinine-1.1 mg/dL

Plain abdominal X-ray showed centrally located numerous small bowel loops with multiple air level, paucity of gas in the lower abdomen.

On the 4^th post op day the patient still didn't improve and abdominal ultrasound was done. The Abdominal ultrasound result was 4.7 by 8.7 cm whorled bowel and mesentery in the right para-umbilical region, free peritoneal fluid seen and other organs liver, spleen, pancreas were with normal findings (Table 1).

Table 1: Vital sign sheet in the wards for initial post-operative condition.

The Assessment confirmed to be small bowel obstruction 2ry to intussusception. After that the patient was resuscitated with 2 L of Ringer Lactate, Catheter and inserted then taken to the operation theatre and re-laparotomy was done.

The intraoperative finding was around 150 mL of serous fluid inside the peritoneum, ileoileal intussusception around 80 cm proximal to ileocecal valve with proximal distended bowel, around 2.5 cm imminent perforation at the mesenteric side of intussucipiens due to hugely distended intussuceptum (Figures 2 and 3).

Figure 2: Lower view of ileoileal intussusception (from pelvic side).

Figure 3: Upper view of ileoileal intussusception (from epigastric side).

What we did intra-operatively was evacuation of peritoneal fluid, reduction of the intussusception, resection of the imminent perforation part of the ileum and end to end ileoileal anastomosis. There was no mass inside the remaining or resected ileum. The patient had smooth post-operative course and was discharged after 7 days of hospital stay.

I would like to thank the department of surgery who did a lot in the management of this patient. My kind gratitude goes to the OR nurses and anesthetist above all my assistant Surgeon Dr. Etsub Abebaw for their good did and active participation.

The authors have no conflicts of interest.