Finds sensors exceeding a clinical pressure threshold — relevant for pressure ulcer risk assessment in wheelchair seating.
Arguments
- trial
A pr_trial from a seating recording.
- threshold
Numeric. Pressure threshold (kPa) above which a sensor is considered a hotspot. Default
4.7(equivalent to 32 mmHg, the capillary closing pressure).- duration_s
Numeric. Minimum sustained duration (s) above threshold for a hotspot to be flagged. Default
0.
Value
A tibble::tibble with columns sensor_id, row, col,
x_mm, y_mm, max_pressure, mean_pressure, duration_above_s.
Examples
pr_calc_seat_hotspot(pr_example_trial("wheelchair"))
#> # A tibble: 559 × 8
#> sensor_id row col x_mm y_mm max_pressure mean_pressure duration_above_s
#> <int> <int> <int> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 17 17 1 0 240 5.13 0.483 0
#> 2 75 11 3 30 150 5.12 0.729 0
#> 3 84 20 3 30 285 4.81 0.448 0
#> 4 104 8 4 45 105 4.82 1.24 0
#> 5 105 9 4 45 120 5.23 1.29 0
#> 6 107 11 4 45 150 4.70 0.999 0
#> 7 132 4 5 60 45 4.77 0.909 0
#> 8 133 5 5 60 60 4.86 1.15 0
#> 9 134 6 5 60 75 4.85 1.47 0
#> 10 135 7 5 60 90 5.04 1.94 0
#> # ℹ 549 more rows