And a lack of perfusion fluid to prime the heart bypass machine had held up all his operations.
The perfusion fluid was carried in a truck stuck in traffic, which held up his operation because the heart bypass machine could not be primed.
mnli hypothesis: The perfusion fluid was carried in a truck stuck in traffic, which held up his operation because the heart bypass machine could not be primed. premise: And a lack of perfusion fluid to prime the heart bypass machine had held up all his operations.