I am sorry to hear he is still sick, breast or bottle? How is his weight doing?
Background: (For why?) The pylorus gets over active, the stomach muscles hypertrophy, the pylorus gets stronger and eventually the pylorus wins, the stomach contracts with incredible power so he gets the projectile. He loses weight, gets "greedy" drinks more and still vomits, reinforcing the cycle. Breasts get sucked dry and go into panic mode. Nice paediatric surgeon
cuts muscle of pylorus. In old days kept in for week or more on "quick pi" or "slow-pi" regimen (it gave the nurses something to do) Now home next day, I have sent one home same day but mum was my paediatric ward sister! Three problems, op will have slowed down the distal bowel, the stomach is still hyperactive, the poor thing is still greedy, the feed could be huge if from breast so he still vomits.
If:
No temperature and
Weight gain, or at least no loss and
Happy between vomits and sleeping reasonable time (more than two hours) before demanding food
Breathe
He will be fine
Else: ask a paediatric surgeon who is earning money rather than drawing a pension.
Hope he is already better.
Just curious, fluclox because done laparoscopically and had a bit of infection round belly button? pm if you do not want to make public. But to anyone finding this thread in the future: If not red and more than 3days from op probably safe to stop fluclox but that is an opinion and not an instruction.