Anti-reflux surgery removes nothing. It pulls the stomach back down, narrows the gap in the diaphragm with stitches, and wraps the stomach top to rebuild the valve.
The valve sits where the food pipe joins the stomach. The operation rebuilds it in four steps.
1. The sac comes out, all of it. The hernia sac is the lining that went up into the chest with the stomach. The surgeon works along the sac rather than on the food pipe. This keeps both vagus nerves safe. These nerves help the stomach empty normally after surgery. A sac that is pushed back but left behind is a hernia waiting to come back.
2. The food pipe is freed. It is freed up into the chest until enough of it rests below the diaphragm without pulling. This is what gives length. Pulling the stomach down and stitching it there does not. Sometimes, even after this, the food pipe is still too short. Then a step to lengthen it is added. This is called a Collis gastroplasty. It is not common, and it is planned ahead, not done on the spot. After it, you stay on acid tablets. That is why it is talked about before the operation, not after.
3. The gap is closed, and the mesh choice is made. The two muscle pillars of the diaphragm are stitched together behind the food pipe with permanent stitches. The gap is made snug, not tight. A gap made too narrow causes lasting trouble swallowing. Mesh is used only when needed, not as routine. It helps when the gap is large or the muscle is too thin to hold stitches. When the muscle is sound, trials found mesh gave no lasting gain. When mesh is used here, it is a kind the body slowly absorbs, placed behind the food pipe. A hard, permanent mesh is not placed against the food pipe. It can wear into it, sometimes years later. That is far worse than the hernia coming back. Small pads can support the stitches where the muscle is thin. If the gap is still under strain, a small release cut in the diaphragm can ease it.
4. Then the wrap. The top of the stomach is wrapped around the lower food pipe. This rebuilds the valve. There are two main kinds of wrap:
- A partial wrap (Toupet, 270°) goes most of the way round, from behind. Over the long run it controls reflux about as well as a full wrap. It causes less trouble swallowing, less bloating, and less of the “cannot burp” feeling that patients find hardest.
- A full wrap (Nissen, 360°) goes all the way round. It may suit you if your food pipe muscle works normally and reflux is severe, and you accept the trade-offs.
If the food pipe muscle is weak, a partial wrap is a must, not a choice. A full wrap on a weak food pipe makes swallowing very hard. This is why a pressure test of the food pipe (manometry) is done before the wrap is chosen, never after.