Your husband's diastolic blood pressure is much less than normal although the systolic is within normal limits. Since he cannot take anything and is throwing up, I feel it would be best if institutional care is provided to him at this point of time to avoid dehydration
and other complications that might ensue. In many cases, if the symptoms are prolonged, recourse might be on parenteral nutrition as to ensure that the nutrient supply is kept intact. Check with your surgeon immediately.