GI bleeding and obstruction

GI emergencies on the NCLEX turn on three maps: bleeding versus perforation, what kind of obstruction you are seeing, and how acid-reducing drugs are timed so they work and stay safe. Pediatric obstructive vignettes deepen further in Pediatric GI care. Variceal bleed in cirrhosis also links to Liver disease and complications.

Upper GI bleeding: stabilize first

Active upper bleeding looks like bright red or coffee-ground vomiting, often with pallor, diaphoresis, tachycardia, and falling blood pressure. Blood in the gut is volume leaving the vascular space. The first job is perfusion and airway protection, not a detailed ulcer history. A client who is vomiting blood can aspirate; a client who is losing volume can crash into hypovolemic shock.

1. Call for help or rapid response as the client destabilizes.
2. Protect the airway if vomiting is ongoing. Elevate the head of bed when safe.
3. Establish large-bore IV access and start volume resuscitation per order (crystalloid, then blood products as directed).
4. Keep NPO. Do not give oral meds or food during active hemorrhage.
5. Notify the provider and prepare for endoscopy or other source control.
6. Monitor vitals, mentation, urine output, and ongoing emesis or stool color as ordered.

Peptic ulcer disease is a common adult source. H. pylori and NSAID use are the usual drivers. Portal hypertension and varices rewrite the risk: the same hematemesis pathway applies, but trauma from a blind NG tube can start a catastrophic bleed when varices are known. Diverticulitis flares need bowel rest (often NPO or clear liquids early). Do not push a high-fiber tray during the acute phase.

The distractor that looks helpful is offering ice chips for comfort, sending the hypotensive client for a leisurely CT before IV access, or charting a full diet history while blood pressure falls. Stabilize first. History and source control come after the airway and volume pathway are moving.

Perforation and peritonitis

When bowel contents leak into the peritoneum, chemical then bacterial inflammation turns the abdomen into a surgical emergency. Board-like rigidity, rebound tenderness, fever, and absent bowel sounds mean peritonitis. Guarding is the muscle wall locking down around an inflamed peritoneum. Keep the client NPO, support IV access, prepare for imaging and surgery as ordered, and escalate now.

Why pain can vanish at rupture: pressure that stretched the organ wall is released into the peritoneum, so the localized agony briefly fades before diffuse peritonitis announces itself. Celebrating that quiet moment delays the OR. Watch for rising fever, tachycardia, and a belly that will not soften.

• NPO and IV access are non-negotiable once peritonitis is the picture.
• Do not give oral contrast, food, or cathartics on a whim when perforation is suspected.
• Pain control and antibiotics follow orders after the surgical pathway is activated. They do not replace notification.

Bowel obstruction (adult)

Mechanical blockage or ileus traps gas and fluid proximal to the problem. Expect cramping pain, distention, vomiting (sometimes feculent in distal obstruction), and changing bowel sounds (often high-pitched early, quiet later) with little or no flatus. Proximal small-bowel obstruction tends to vomit early with less dramatic distention; distal large-bowel obstruction distends more and may vomit later. The complication that rewrites the plan is ischemia and perforation into the peritonitis pattern above.

Early care usually includes NPO, IV fluids, and nasogastric decompression when ordered so the gut can rest and vomiting risk falls. Strict I&O, electrolyte replacement, and serial abdominal exams matter because obstruction is a moving picture. Rising pain with a rigid abdomen, fever, or rebound is no longer simple obstruction care.

• Do not feed through a mechanical blockage to keep calories up.
• After gastric surgery, dumping syndrome teaching differs from obstruction: small frequent meals, limit fluids with meals, reduce simple sugars, and rest after eating.
• Pancreatitis, when the stem lands here: severe epigastric pain to the back, NPO, aggressive IV fluid support, pain control, watch for hypovolemic shock.

Pediatric obstruction: use the peds chapter

Projectile nonbilious vomiting with an olive mass, currant-jelly stool with knees-to-chest crying, delayed meconium with ribbon stools, and first-feed choking/cyanosis are pediatric patterns. Full fingerprints, fluid-before-surgery, enema-reduction teaching, enterocolitis, and TEF NPO rules live in Pediatric GI care. This chapter keeps adult SBO/ileus and perforation. Do not treat an infant olive-mass stem as “NPO and NG like grandpa’s SBO” and stop there.

Pancreatitis (when the stem lands here)

Severe epigastric pain radiating to the back with nausea, tachycardia, and volume loss is acute pancreatitis until the workup says otherwise. Early priorities: NPO, aggressive IV fluid support, pain control, and watch for hypovolemic shock. Do not offer a full meal to settle the stomach. Enzyme labs and etiology workup follow; nursing priority stays perfusion and gut rest.

Acid-reducing agents: timing is the test

These drugs fail when taken at the wrong time relative to food and other meds. Teach the clock, then the risk. Acid suppression supports ulcer healing and bleed prevention pathways, but only if the drug reaches the target at the right moment.

• If the client stacks an antacid with a morning pill organizer, teach spacing, not take everything together for convenience.
• Long-term PPI users need more than reflux reassurance: watch magnesium trends, infection risk, and bone health conversations with the provider.

Priority map under pressure