Medical Education

Abdominal Examination Guide: Systematic Assessment

Master abdominal examination with this comprehensive guide. Learn proper inspection, auscultation, palpation, percussion techniques, special maneuvers, and interpretation of findings for thorough abdominal assessment.

Abdominal Examination Framework: Systematic Approach

Thorough abdominal examination enables diagnosis of intra-abdominal pathology. Systematic examination using proper sequence optimizes findings. Understanding normal variations guides interpretation of abnormal findings.

Abdominal Assessment Facts:

  • Accurate examination detects 80% of significant abdominal pathology
  • Proper sequence (inspect, auscultate, palpate, percuss) essential
  • Abdominal pain affects 5-7% of primary care visits
  • Abdominal examination takes 10-15 minutes when thorough
  • Patient comfort essential for accurate assessment

Preparation and Patient Positioning

  • Warm hands before touching patient
  • Position supine with knees bent (relaxes abdominal muscles)
  • Expose abdomen from xiphoid to pubis
  • Ensure warm, private examination space
  • Observe facial expression for pain/discomfort

Inspection: Visual Assessment

Abdominal Contour and Surface

  • Shape: Flat, rounded, protuberant, or distended
  • Symmetry: Note asymmetrical swelling (mass, hernia)
  • Visible pulsations: Aortic pulsation normal in thin patients
  • Visible peristalsis: Abnormal, suggests obstruction

Skin Assessment

  • Color: Icteric (yellow), flush (fever), pallor
  • Scars: Document location, suggest prior surgery
  • Striae: Stretch marks (weight change, Cushing's syndrome)
  • Rashes or lesions: Note location, characteristics
  • Hair distribution: Male pattern vs female

Auscultation: Listening Before Palpation

Bowel Sounds Assessment

  • Normal: 5-35 sounds per minute, irregular
  • Hyperactive: >35 sounds/min (diarrhea, early obstruction)
  • Hypoactive: <5 sounds/min (ileus, peritonitis)
  • Absent: No sounds in 3-5 minutes (complete ileus)
  • Timing: Listen at least 1 minute to confirm absence

Vascular Sounds

  • Bruit: Abnormal swooshing sound (arterial stenosis, aneurysm)
  • Listen over aorta (epigastrium)
  • Listen over femoral arteries (groin)
  • Presence suggests vascular disease

Palpation: Tactile Assessment

Light Palpation (1 cm depth)

  • Purpose: Assess tenderness, tone, superficial masses
  • Technique: Use fingertips, gentle pressure throughout abdomen
  • Systemically: All four quadrants
  • Observe: Patient's face for signs of pain
  • Rebound tenderness: Pain on rapid release suggests peritonitis

Deep Palpation (4-5 cm depth)

  • Purpose: Assess organ size and deeper masses
  • Technique: Use flathand or bimanual approach
  • Exam tender areas last: Avoid pain complaints early
  • Masses: Note size, consistency, tenderness, mobility

Liver Palpation

  • Palpate in right upper quadrant at costal margin
  • Normal: Edge <2 cm below margin, smooth, non-tender
  • Hepatomegaly: Enlarged liver (>2 cm below margin)
  • Hardness: Cirrhosis causes hardened, nodular surface
  • Palpate during inspiration (liver descends)

Spleen Palpation

  • Start in left lower quadrant, palpate toward rib cage
  • Patient inspires deeply
  • Normal: Not palpable, at margin of rib cage
  • Splenomegaly: Palpable (implies serious pathology)
  • Feel for splenic infarcts (tenderness)

Kidney Palpation

  • Costovertebral angle (CVA) tenderness suggests kidney disease
  • Percuss (tap) over CVA, not palpate kidneys
  • Tenderness suggests pyelonephritis or kidney stones

Percussion: Assessment by Tones

Abdominal Percussion

  • Resonance: Normal (gas-filled bowel)
  • Dullness: Solid organ or fluid
  • Hyperresonance: Abnormal (pneumoperitoneum)

Liver Percussion

  • Percuss from midline to right costal margin
  • Normal span: 12-15 cm at midclavicular line
  • Enlarged span: Suggests hepatomegaly

Ascites Detection

  • Shifting dullness: Dullness shifts with patient position (diagnostic)
  • Fluid wave: Wave felt across abdomen (indicates significant ascites)
  • Bulging flanks: Visible sign of fluid accumulation
  • Sensitivity increases with volume of fluid present

Special Maneuvers and Tests

McBurney's Point Tenderness

  • Located 1/3 distance from ASIS to umbilicus
  • Tenderness at McBurney's point suggests appendicitis
  • Rebound tenderness and guarding increase suspicion

Murphy's Sign

  • Palpate under right costal margin during deep inspiration
  • Patient catches breath (pain) if gallbladder inflamed
  • Highly suggestive of acute cholecystitis

Rovsing's Sign

  • Palpate left lower quadrant (away from appendix)
  • Patient feels pain in right lower quadrant (appendicitis)
  • Indicates peritoneal irritation from appendix

Guarding and Rigidity

  • Guarding: Muscle tensioning with palpation (voluntary)
  • Rigidity: Continuous muscle tension (involuntary, suggests peritonitis)
  • Significance: Rigidity indicates surgical abdomen

Documentation and Interpretation

Normal Examination

  • "Soft, flat, non-distended abdomen"
  • "Normal active bowel sounds"
  • "Liver, spleen not palpable"
  • "No tenderness, guarding, or rebound"

Abnormal Findings

  • Location, character, and severity of tenderness
  • Organ size and characteristics
  • Presence of masses
  • Signs of peritonitis (guarding, rebound, rigidity)

Key Takeaways: Abdominal Examination Mastery

  • Follow proper sequence: Inspect, Auscultate, Palpate, Percuss
  • Use light palpation before deep palpation
  • Examine tender areas last to minimize discomfort
  • Assess for peritonitis signs (rebound, guarding, rigidity)
  • Measure liver and spleen size accurately
  • Use special maneuvers appropriately (McBurney's, Murphy's)
  • Detect ascites through shifting dullness and fluid wave
  • Document findings clearly and objectively