Gastroparesis Treatment Surgery In St. Petersburg, FL

The main surgical option for refractory gastroparesis is G-POEM, short for gastric per-oral endoscopic myotomy (also called endoscopic pyloromyotomy). It treats one specific problem: a pylorus, the muscular valve at the stomach outlet, that stays too tight and slows emptying. Working through an endoscope passed down the mouth, the surgeon cuts that muscle from the inside to lower the resistance, so food leaves the stomach more normally. There are no cuts on your abdomen.

For people in St. Petersburg, the practical picture is simple. Dr. Grandhige’s office is in South Tampa, reachable in about 25 to 35 minutes over the Gandy or Howard Frankland Bridge, and the procedure itself is performed at HCA Florida South Tampa Hospital. You can read his full gastroparesis overview for background on the condition and how he approaches it. What follows is what actually matters when you are deciding whether this is worth the trip: how the diagnosis is confirmed, how the procedure works, who it helps, how it compares to the alternatives, and what the published results show.

No responsible surgeon treats gastroparesis on symptoms alone. Nausea, early fullness, bloating, and food sitting for hours overlap with other problems, including acid reflux, so the diagnosis is confirmed with a gastric emptying study before surgery is on the table. The standard test is scintigraphy: you eat a small labeled meal and a scanner measures how much is left at set intervals. More than 60% of the meal remaining at 2 hours, or more than 10% at 4 hours, is the accepted threshold for delayed emptying. You can read more about the condition and this test from the National Institute of Diabetes and Digestive and Kidney Diseases.

Cause matters, because it changes the odds and sometimes the plan. Gastroparesis is usually diabetic, idiopathic (no identified cause, and the most common type), or post-surgical, from vagus nerve injury during a prior operation on the esophagus or stomach. Some patients now develop slow emptying while taking GLP-1 medicines such as semaglutide; if a medicine is driving it, adjusting that medicine can be the first step rather than surgery. Mechanical causes are ruled out too: a large hiatal hernia, for one, can leave the stomach slow to empty and mimic the picture. In selected cases the pylorus itself is measured with EndoFLIP, the same catheter-based technology Dr. Grandhige uses when treating achalasia, which gauges how easily the valve opens and helps predict who will respond.

G-POEM is an endoscopic procedure done under general anesthesia, and most people go home the same day or the next. Nothing is cut on the outside of the body. The surgeon passes a flexible endoscope through the mouth into the stomach, creates a small tunnel in the lining near the pylorus, divides the tight pyloric muscle, then closes the entry point with clips. The muscle cut is permanent; the small opening in the lining heals on its own. The active part of the procedure often takes around 20 to 30 minutes, though total time in the room is longer once anesthesia and recovery are counted.

Because there are no abdominal incisions, recovery is faster than with open or laparoscopic stomach surgery, and there is no external wound to care for. You will follow a staged diet, starting with liquids and advancing over a couple of weeks as things settle. This is still a real procedure on the stomach, not a minor one, so the after-care instructions matter for a good result.

G-POEM is one option among several, and the right one depends on the cause, the dominant symptom, and the testing. Here is how the main approaches differ:

• G-POEM (endoscopic pyloromyotomy). It is incisionless and endoscopic, and the muscle cut is permanent. It targets a tight pylorus to improve emptying, with same-day or next-day discharge in most cases. This is the procedure Dr. Grandhige performs for appropriately selected gastroparesis.
• Pyloric Botox injection. An endoscopic injection into the pylorus that relaxes the muscle temporarily, usually for weeks to a few months. Evidence for lasting benefit is limited, so it is generally used as a short-term or predictive step rather than a durable fix.
• Gastric electrical stimulation (Enterra). An implanted device that stimulates the stomach muscles. It is reserved for refractory diabetic or idiopathic cases and tends to help nausea and vomiting more than it speeds emptying. It is a surgical implant, not an endoscopic procedure.
• Surgical pyloroplasty or laparoscopic pyloromyotomy. A surgical version of widening the pylorus, done through the abdomen. It targets the same valve as G-POEM but is more invasive.
• Nutrition support or gastrectomy. Held for the most severe, treatment-resistant cases, where feeding support or, rarely, removing part of the stomach is considered.

The point of testing first is to match the person to the right one of these, not to default everyone to surgery.

Dr. Grandhige focuses exclusively on foregut surgery, the benign conditions of the esophagus, diaphragm, and stomach, and has practiced in the Tampa Bay area since 2009. He trained in general surgery at Yale New Haven Hospital and completed fellowship training in foregut and minimally invasive surgery there, after medical school at the University of Michigan. He is a Fellow of the American College of Surgeons, a member of the Society of American Gastrointestinal and Endoscopic Surgeons, and a founding member of the American Foregut Society. You can review his full training and credentials and verify his standing independently through the American Board of Surgery and the Florida Department of Health license lookup.

The volume is real: in his reflux practice he has performed more than 600 fundoplications, more than 600 LINX procedures, and more than 200 TIF procedures, and G-POEM for gastroparesis sits within that same foregut focus. Two things patients mention most. First, continuity. The same dedicated physician assistant assists in every case and is reachable during recovery, Dr. Grandhige takes after-hours calls himself, and all procedures are done at one hospital, HCA Florida South Tampa, with a team that performs these operations routinely. You are not passed to unfamiliar providers. Second, the explanations. Patients frequently point to the hand-drawn diagrams he uses to show exactly what is happening in their anatomy and why a given step does or does not make sense for them.