Comprehensive Nursing Management: Gastrointestinal, Oral, Esophageal, and Peripheral Vascular Disorders

Flashcards covering gastrointestinal anatomy and diagnostic assessments, oral and esophageal diseases, enteral and parenteral nutrition, and peripheral arterial, venous, and lymphatic disorders.

What are the three primary functions of the digestive system?

The breakdown of food particles into the molecular form for digestion, absorption into the bloodstream of small nutrient molecules produced by digestion, and elimination of undigested, unabsorbed foodstuffs and other waste products.

Which segment of the gastrointestinal tract is primarily responsible for the reabsorption of water and electrolytes?

The colon (reabsorption of water and electrolytes is its primary function, while digestion and nutrient breakdown occur in the small intestine).

How do the exocrine functions of the pancreas differ from its endocrine functions?

Exocrine functions involve the secretion of protein-rich digestive enzymes (including amylase, trypsin, and lipase) and electrolyte-rich fluid into the gastrointestinal tract, whereas endocrine functions involve hormone production (insulin from beta cells, glucagon from alpha cells, and somatostatin from delta cells) directly into the bloodstream.

What are the anatomical characteristics and primary function of the gallbladder?

It is a pear-shaped, hollow, saclike organ approximately $10\,\text{cm}$ ($4\text{ inches}$) long that lies in a shallow depression on the inferior surface of the liver and serves as a storage area for bile.

What clinical manifestations occur when bilirubin excretion is disrupted or prevented from entering the small intestine?

Elevated blood bilirubin levels cause jaundice and icterus (yellowing of the sclerae); increased renal excretion of urobilinogen causes dark-colored urine, and failure of bile to reach the small intestine results in clay-colored stool.

In what chronological order should a physical assessment of the abdomen be executed?

Inspection, auscultation, percussion, and palpation.

What is the recommended medication restriction prior to undergoing gastric analysis and a gastric acid stimulation test?

Any medications that affect gastric secretions must be withheld for $72\text{ hours}$ before the test.

What is the initial diagnostic test of choice when screening a non-distressed patient suspected of having a chronic gastrointestinal bleed?

Stool testing, specifically fecal occult blood testing (FOBT) for occult (non-visible) blood.

What diagnostic procedure utilizes an endoscope combined with X-ray techniques to visualize the ductal structures of the biliary tract?

Endoscopic retrograde cholangiopancreatography (ERCP).

What anatomical distinction differentiates a radical neck dissection from a modified radical neck dissection?

A radical neck dissection removes all cervical lymph nodes from the mandible to the clavicle, along with the sternocleidomastoid muscle (SCM), internal jugular vein (IJV), and spinal accessory nerve (CN XI); a modified radical neck dissection preserves one or more of these nonlymphatic structures.

Following a radical neck dissection for oral cancer, what nursing assessment represents the highest priority?

Assessment of respiratory status and airway clearance.

What dietary management is indicated for a patient following surgical reconstruction of the jaw for temporomandibular joint disorder using rigid fixation?

The patient must not chew food in the first $1\text{ to }4\text{ weeks}$ after surgery, and a liquid diet is recommended.

What is parotitis, and which bacterial organism is most commonly responsible?

Parotitis is the most common inflammatory condition of the salivary glands, usually caused by Staphylococcus aureus.

What pathophysiology and key clinical manifestation define achalasia?

It is characterized by absent or ineffective peristalsis of the distal esophagus with failure of the lower esophageal sphincter to relax in response to swallowing, manifesting as difficulty swallowing (dysphagia) of both liquids and solids.

Why do patients diagnosed with an esophageal diverticulum frequently complain of halitosis and a sour taste?

Decomposition of retained food trapped within the outpouching of esophageal mucosa and submucosa.

What cellular epithelial alteration occurs in Barrett esophagus?

The esophageal mucosa alters from normal flat squamous epithelium to elongated columnar epithelium, commonly in response to chronic GERD.

Why are over-the-counter antacids after meals unlikely to resolve the underlying etiology of gastroesophageal reflux disease (GERD)?

The etiology of GERD relates to lower esophageal sphincter incompetence, pyloric stenosis, or motility disorders rather than abnormalities in gastric acid pH.

What is the gold standard method for verifying the anatomical placement of a blindly inserted gastrointestinal tube?

Radiographic (abdominal X-ray) confirmation.

What volume of sterile water should be used to flush a feeding tube during medication administration?

The tube should be flushed with $30\text{ to }50\,\text{mL}$ before administration and $15\,\text{mL}$ after administration to minimize occlusion risk.

What mechanisms cause dumping syndrome in patients receiving tube feedings, and how is it prevented?

Rapid infusion of high-osmolality formulas draws fluid from surrounding tissues and the vasculature into the bowel lumen, causing fullness, nausea, diarrhea, dehydration, hypotension, and tachycardia; it is prevented by administering room-temperature formula, slowing feeding rates, maintaining a semi-Fowler position for $1\text{ hour}$ post-feeding, or switching from bolus to continuous feeds.

What is the most common gastrointestinal complication associated with enteral nutrition, and what is its cause?

Diarrhea, commonly caused by the hyperosmolality of the enteral feeding solution combined with decreased serum osmolality.

What type of feeding device is shown here, when can it be placed, and what are its notable clinical characteristics?

A low-profile gastrostomy device (LPGD, such as a MIC-KEY) placed $3\text{ to }6\text{ months}$ after initial gastrostomy tube insertion; it sits flush with the skin to eliminate tube migration and features an antireflux valve, though residual volume assessment is not possible.

How do non-tunneled central catheters and PICC lines differ regarding duration of therapy for parenteral nutrition?

Non-tunneled central catheters are designed for short-term therapy ($< 6\text{ weeks}$, commonly inserted via the subclavian vein), whereas peripherally inserted central catheters (PICCs) provide intermediate-term therapy (several days to months, placed via the basilic or cephalic vein).

What visual abnormalities dictate that an intravenous fat emulsion (IVFE / Intralipid) should be discarded rather than infused?

Frothiness, separation of layers, or an oily appearance.

What is the hallmark symptom of peripheral arterial disease (PAD) in the lower extremities?

Intermittent claudication (muscular, cramp-type pain brought on by exercise and relieved by rest), occurring in muscle groups distal to the diseased arterial segment.

How does limb positioning influence pain and tissue perfusion in a patient with peripheral arterial disease?

Elevation reduces arterial blood flow and increases pain; placing the lower extremities in a dependent position promotes gravity-assisted perfusion and alleviates rest pain.

How is the Ankle-Brachial Index (ABI) calculated?

It is calculated by dividing the systolic blood pressure (SBP) in the ankle by the higher of the two brachial systolic blood pressures: $\text{ABI} = \frac{\text{Ankle SBP}}{\text{Higher Brachial SBP}}$.

What is the pharmacologic mechanism and action of cilostazol in treating intermittent claudication?

It is a phosphodiesterase III inhibitor that produces vasodilation and inhibits platelet aggregation.

What triphasic color sequence occurs during an episode of Raynaud phenomenon, and what causes each phase?

The skin turns white (pallor) from initial arterial vasospasm, then blue (cyanosis) due to deoxygenation of pooled blood, and finally red (rubor) as vasodilation restores blood flow, accompanied by throbbing or burning sensations.

What three pathophysiologic factors compose Virchow triad in the development of venous thrombosis?

Stasis of blood, vessel wall injury, and altered coagulation.

Which laboratory parameter is routinely monitored during unfractionated heparin therapy, and what medication reverses heparin toxicity?

Activated partial thromboplastin time (aPTT); its anticoagulant effect is promptly reversed by protamine sulfate.

What clinical complications can occur from the rapid administration of protamine sulfate?

Bradycardia and hypotension, which are prevented or minimized by slow administration.

How do arterial and venous ulcers differ in clinical presentation, wound appearance, and typical anatomical location?

Arterial ulcers occur on the tips of toes, web spaces, heels, or shins, with round, smooth margins, pale or necrotic (black eschar) beds, and absent/weak pulses; venous ulcers occur at the ankle (medial malleolus), featuring irregular borders, yellow slough or ruddy granulation, surrounding edema, and heavy exudative drainage.

How does debridement management differ between arterial ischemic ulcers and chronic venous ulcers?

Arterial ulcers are kept dry and necrotic tissue is not debrided until revascularization procedures have restored arterial flow, whereas venous ulcers with necrotic tissue should be debrided.

What nursing interventions should be implemented for an extremity affected by acute cellulitis?

Elevating the affected area above heart level and applying warm, moist packs to the site.

What is the role of pharmacologic therapy in the medical management of lymphedema?

No pharmacologic therapy has been proven beneficial for lymphedema; treatment centers on comprehensive decongestive therapy, manual lymphatic drainage, exercise, and compression wraps or garments.