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Health Assessment · Chapter 4

The Infection Assessment Bench

Infection needs six intact links, and you find it with your hands and your ears before the laboratory finds it at all. Put the four examination techniques in order — including the abdominal exception — read a set of vital signs against the ranges that belong to that patient’s age, and then turn your worry into an SBAR that actually asks for something.
Which region are you examining?
Before you may chart “bowel sounds absent”
You have listened in the right lower quadrant and heard nothing. How many minutes must you listen in one quadrant before you are allowed to document absent bowel sounds?
Why the order is the order
Place all four techniques, then press Check the sequence.
The default sequence is inspect, palpate, percuss, auscultate. Inspect first because touching changes what you see — pressing on skin blanches it — and because looking costs nothing. Palpate with warm hands and short nails, light palpation to about 1 cm before deep palpation to 4–5 cm, and always palpate the tender area last so guarding does not contaminate the rest of the exam. Percuss third for the resonance that tells you whether what is underneath is air-filled, fluid-filled or solid. Auscultate fourth, diaphragm for high-pitched sounds, bell for low-pitched, on skin and never through a gown.
The abdomen is the exception, and it is the exception you will be asked about. For the abdomen: inspect, auscultate, percuss, palpate. Auscultation moves ahead of percussion and palpation because pressing on the abdomen mechanically stimulates or suppresses peristalsis and gives you falsely altered bowel sounds. Listen in all four quadrants, beginning in the right lower quadrant over the ileocecal valve, with the diaphragm, for 5 to 20 seconds per quadrant if sounds are present. Normal is 5 to 30 gurgles per minute. The nurse who palpates the abdomen of a patient with suspected C. difficile colitis has destroyed the most useful piece of data they had.
At a wound or an intravenous site
1Inspect for the classic local signs — erythema, edema, warmth, pain, purulent drainage, loss of function.
2Palpate for warmth compared with the opposite limb, induration, fluctuance suggesting an abscess, and crepitus, which is an emergency.
3Measure the area of erythema in centimetres and mark its border with a skin pen and the time, so the next nurse can tell whether cellulitis is advancing.
4Describe the drainage by amount, colour and odour: serous (clear), sanguineous (bloody), serosanguineous (pink), purulent (thick, opaque, yellow, green or brown).
Erythema is not always red. In patients with dark skin tones, inflammation and cellulitis often appear violaceous, deep brown, grey or simply darker than the surrounding skin, and the classic red streak may be invisible. Rely on comparison with the contralateral side, palpation for warmth and induration, tenderness, and the patient’s own report of a change, under natural or high-intensity white light. For cyanosis, assess the oral mucosa, conjunctivae, palms and soles, and nail beds rather than the lips and face. For pallor, the conjunctivae, oral mucosa and palms. For jaundice, the sclera next to the iris and the hard palate — remembering that subconjunctival fat can look yellowish in darker-skinned patients. For petechiae, the conjunctivae, buccal mucosa, palms and soles.