A patient is found to have a reddened area of skin with serum-filled blister formation. The wound is staged as

Appeared in: GMCH - 2015

Explanation

A Stage II pressure injury is characterized by partial-thickness loss of skin, meaning the epidermis and part of the dermis are damaged.
The clinical presentation of a Stage II injury can be a shallow, pink or red wound bed, or, as in this case, an intact or ruptured serum-filled blister.
In this stage, deeper tissues like adipose (fat), muscle, or bone are not visible.
The presence of a blister filled with clear/yellowish serum is a classic sign that distinguishes Stage II from other stages.

Option A: Stage I pressure injuries are defined by intact skin with non-blanchable erythema (redness). The presence of a blister indicates that the skin is no longer intact, ruling out Stage I.
Option C: Stage III involves full-thickness skin loss where subcutaneous fat is visible. A serum-filled blister only involves the epidermal and dermal layers, making it a partial-thickness injury, which is less severe than Stage III.
Option D: Stage IV is the most severe stage, characterized by full-thickness skin and tissue loss with exposed or directly palpable bone, muscle, or tendon. This is far more extensive than a blister.

Clinical Relevance

Nursing practice connection: Use the key finding related to Pressure Ulcer Staging to guide bedside assessment, documentation, and the next nursing action.
Accurate staging of a pressure injury is a critical nursing responsibility as it directly influences the treatment plan, including the choice of dressings, need for debridement, and pressure-relieving strategies.
Early identification of Stage II injuries allows for prompt intervention to prevent progression to deeper, more difficult-to-heal Stage III or IV wounds.
Nursing care for Stage II injuries focuses on maintaining a moist wound environment, protecting the area from further pressure and shear, and managing pain.

How to Approach the Question

First, identify the key clinical signs described in the question stem. The most important phrases are 'reddened area of skin' and 'serum-filled blister formation'.
Next, systematically recall the definitions for each of the four main stages of pressure injuries.
Focus on the most specific sign provided: the 'serum-filled blister'. Match this sign to the correct stage definition.
A serum-filled blister is a hallmark of partial-thickness skin loss, which corresponds directly to the definition of a Stage II pressure injury.
Eliminate the other options. Stage I has intact skin (no blister). Stage III and IV involve full-thickness loss, which is deeper than a blister and would show fat or bone/muscle, respectively.

Concept Tested & Keywords

Concept Tested: Pressure Ulcer Staging
Stem keywords: reddened area, skin, serum-filled blister
Lead-in keywords: staged as
Clinical cues: The presence of a 'serum-filled blister' is the definitive clue for staging.

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E6 Nursing Fundamentals Potter Perry 12e Part 6 p. 69-71

E6 Nursing Fundamentals Taylor p. 560-562

Practise the full GMCH - 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.