1. What is the 90-Day Surgery Calculator?

The 90-Day Surgery Calculator calculates the end date that is exactly 90 days after a surgery date. This is commonly used in medical contexts for follow-up periods, post-operative care planning, and clinical trial timelines.

2. How Does the Calculator Work?

The calculator uses a simple date addition formula:

Where:

• Surgery Date — The date when the surgical procedure was performed
• 90 days — The standard follow-up period

Explanation: The calculator adds exactly 90 calendar days to the surgery date, accounting for different month lengths and leap years.

3. Importance of 90-Day Calculation

Details: The 90-day period is significant in surgical outcomes research, Medicare billing, and quality metrics. Many surgical outcome studies use 90-day mortality and complication rates as key indicators.

4. Using the Calculator

Tips: Enter the surgery date in YYYY-MM-DD format or use the date picker. The calculator will display the date exactly 90 days after the surgery date.

5. Frequently Asked Questions (FAQ)

Q1: Does this include the day of surgery?
A: No, the calculation starts the day after surgery (day 1 is the first post-operative day).

Q2: What if the end date falls on a weekend or holiday?
A: The calculator shows the calendar date regardless of weekends or holidays. Clinical applications may need to adjust for these.

Q3: Is this the same as 3 months after surgery?
A: No, 90 days is not exactly 3 months (which could be 89-92 days depending on the months involved).

Q4: Can I calculate other time periods with this?
A: This calculator is specifically for 90 days. Other time periods would require different calculations.

Q5: How accurate is this calculation?
A: The calculation is mathematically precise, adding exactly 90 calendar days to the input date.