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. 2021 Dec 6;128(5):1048–1056. doi: 10.1002/cncr.34011

Figure 5.

Figure 5

Nomogram to calculate the relationship between unperformed cases, potential monthly capacity above baseline, and months needed to clear all unperformed cases. Formula: Monthly percent increase in volume to clear unperformed cases = unperformed cases as percent of monthly baseline/months to clear unperformed cases. Example (red line): From April 1, 2020, to October 1, 2020 (6 months), we performed 50% of our expected monthly volume of colonoscopies. We have a backlog of 300% of our monthly volume: 6 × 50 = 300%. We can perform up to 125% of our expected monthly volume of colonoscopies, an additional 25%. We connect the 25 on the far‐left line with 300 on the middle line using a straight edge to calculate that it will take us 12 months to clear these unperformed cases. Alternatively, we calculate that we have an unperformed case load of 300% of our monthly volume. We want to clear these cases within 1 year or 12 months. We connect the 12 on the far‐right line with 300 on the middle line using a straight edge to calculate that it will take an increased volume of 25% to clear these cases in the desired time period.