Can a Deep Tissue Injury Progress to Stage 2?
Yes, a deep tissue injury (DTI) can evolve to become a Stage 2 pressure injury, though this represents improvement rather than deterioration—DTI can resolve to partial-thickness wounds as the damaged deeper tissue heals and sloughs, revealing the true extent of injury.
Understanding DTI Evolution Patterns
DTI represents injury that begins in deep muscle tissue near bone and may initially appear as intact skin with purple or maroon discoloration 1. The natural history of DTI follows several possible trajectories:
Documented Outcomes from Clinical Studies
The most relevant clinical data shows that DTI evolution is not unidirectional toward worsening. In a retrospective analysis of 179 hospital-acquired DTIs, outcomes at discharge included 2:
- 28 resolved completely (16%)
- 131 became partial-thickness/stable (73%)
- 20 progressed to full-thickness/unstageable (11%)
This demonstrates that the majority of DTIs either resolve or evolve to partial-thickness injuries (which includes Stage 2), rather than inevitably progressing to deeper wounds.
Treatment Impact on Evolution
A prospective study using noncontact low-frequency ultrasound showed that at discharge, the treatment group's final pressure injury stages were 3:
- 50% Stage 2 pressure injuries
- 23% remained DTI
- Minimal progression to unstageable
In contrast, the control group had 57% unstageable and 27% still DTI, indicating that DTI commonly transitions to Stage 2 as part of the healing trajectory, particularly with appropriate intervention.
Clinical Interpretation
Why DTI Can Become Stage 2
When DTI heals, the damaged deep tissue must be reabsorbed or slough away. As this occurs:
- The overlying skin may blister or break down
- Partial-thickness tissue loss becomes visible
- This manifests as a Stage 2 pressure injury (partial-thickness skin loss with exposed dermis)
This transition from DTI to Stage 2 actually represents clinical improvement, not deterioration, as the wound is resolving from deep injury to more superficial involvement.
Factors Associated with Better Outcomes
DTIs more likely to resolve or evolve to partial-thickness (Stage 2) rather than full-thickness showed 2:
- Shorter hospital length of stay
- Shorter time from admission to DTI identification
- Absence of vasopressor use after DTI development
- Device-related DTIs (better prognosis)
- Absence of mechanical ventilation
- No feeding tube requirement
Factors Predicting Deterioration
DTIs at higher risk of progressing to full-thickness (Stage 3/4/unstageable) were associated with 2:
- Prolonged mechanical ventilation
- Vasopressor use
- Anemia
- History of cerebrovascular accident
- Extended ICU stays
Clinical Pitfall to Avoid
Do not assume that a DTI becoming a Stage 2 represents failure of care or wound deterioration. This evolution often indicates that the deep tissue damage is resolving and the wound is healing from the inside out. The appearance of partial-thickness tissue loss may actually be a positive prognostic sign compared to progression to full-thickness injury.
Prognostic Indicators
Studies suggest that positive capillary refill in DTI is associated with resolution without tissue loss (100% resolution rate, p=0.02), while negative capillary refill correlates with deterioration 4. Cooler skin temperature measured by infrared thermography also predicts worse outcomes 4.