Sphincter of Oddi dysfunction (SOD) is a functional gastrointestinal abnormality which commonly causes acute pancreatitis. Even without the unfortunate occurrence of acute pancreatitis Sphincter of Oddi dysfunction is characterized by pancreatobiliary pain that can be debilitating and impair the patients quality of life.
As far as I can tell from reading dozens of articles nobody knows for sure what causes this functional abnormality.
Sphincter of Oddi dysfunction is associated with gallbladder disease, gallstones and ironically those who have the gallbladder removed seem to be more prone to Sphincter of Oddi dysfunction.
The majority of SOD patients are female, 30 – 50 years of age; however, that certainly doesn’t mean that males are immune to this condition. Close to 20% of the lucky folks with Sphincter of Oddi dysfunction are male.
What Is The Sphincter of Oddi?
Imagine a strong doughnut, a muscular valve that surrounds the exit of the bile and pancreatic ducts, into the duodenum, right at the papilla of Vater [1,2]. That muscular valve is called the Sphincter of Oddi.
The SO is normally closed for business. It opens only in response to the flow of digestive juices after a meal so that those digestive juices can enter the duodenum and help digest the foods eaten for intestinal absorption to occur.
The mechanism of Sphincter of Oddi dysfunction, why it occurs, is not well-known. The theory is that the sphincter goes into a spasm causing a temporary back-up of biliary and pancreatic juices. This “back-up” is not a good thing.
Sphincter of Oddi Dysfunction Symptoms
The back-up of digestive juices we were talking about previously, results in abdominal pain. The pain can be mild, moderate or severe, even debilitating. Unfortunately this back-up of digestive juices can and commonly does cause acute pancreatitis.
Symptoms of SOD include:
- abdominal pain
- located in mid- or right-upper abdomen
- might also be felt in the back and shoulders
- can last anywhere from several minutes to several hours
- can be a mild, dull throbbing pain, or …
- can be so severe that the individual is incapacitated
- Nausea with or without vomiting
- prolonged obstruction may result in bile leaking back into the blood stream
- results in abnormalities of the liver function tests
- can result in a yellowish discoloration of the eyes and skin
The above symptoms can come and go. They can be mild one time and severe the next.
Diagnosing Sphincter of Oddi Dysfunction
Chances are that unless you have a really sharp doctor you’ll suffer for months, even years, playing let’s find the clue, especially if you are male, have NOT had any sign of gallbladder disease or had gallbladder disease and underwent cholescystectomy (gallbladder surgery). If on the other hand if you are female, between 30 and 50 and have had your gallbladder removed your chances of having your doctor’s light bulb flash on Sphincter of Oddi dysfunction is much higher.
When Sphincter of Oddi dysfunction is suspected by your doctor, he or she will most likely run tests to check for other conditions that might be causing your abdominal pain. It is important to rule out biliary cancer, cancer of the pancreas, liver, peptic ulcer or stones in the ducts that carry bile from the liver. In some cases even heart conditions can cause pain that seems to be originating from the abdomen.
- Blood is drawn to check on liver and pancreas tests (particularly alkaline phosphatase, transaminases and amylase/lipase).
- Standard ultrasound and CT scans are used to look for structural causes, but are not completely accurate.
- When these are unrevealing, most experts recommend other imaging procedures, such as Magnetic Resonance Cholangiopancreatography (MRCP) and Endoscopic Ultrasound (EUS). One of these should be used before considering more invasive, risky procedures like ERCP with Sphincter of Oddi manometry to check sphincter pressure.
- Another test (HIDA scanning) is sometimes used to detect poor emptying of the bile duct due to sphincter activity, and BOTOX injection into the sphincter has been explored as a test for over-activity.
- Sphincter of Oddi manometry is done by placing a small tube into your pancreatic duct or common bile duct near the SO to measure how well it is contracting and expanding. There is a risk of acute pancreatitis with this test .
What are the criteria your doctor may be looking for via tests and patient history in order to correctly diagnose Spincter of Oddi Dysfunction? Let us take a peek …
Type I: All of the following:
- Recurrent biliary pain
- Liver test elevations (AST or ALT) on two separate occasions (2x upper limit of normal) with resolution inbetween
- Dilated common bile duct (11 mm)
- Recurrent biliary pain plus 1 of the above criteria
- Biliary type pain only
Type III is the probably most difficult to diagnose because there are no physical signs that show on tests. So they have to listen closely to the patient and many of us know how difficult that is for doctors 🙂
Sphincter of Oddi Dysfunction Treatment
Sphincter of Oddi dysfunction treatment can be a crap shoot. In those people who do not have severe symptoms sphincter of oddi dysfunction treatment may be drugs that reduce pain and help prevent sphincter of oddi spasms. In others with severe symptoms the doctor may refer them to a surgeon for a procedure called a sphincterotomy.
There are 3 categories of Sphincter of Oddi dysfunction, (1, 11, 111). Each category of Sphincter of Oddi dysfunction suggests certain forms of Sphincter of Oddi dysfunction treatment. I will give my unprofessional Sphincter of Oddi dysfunction treatment ideas (what I would do if I had SOD) that should probably never be used, especially without your doctors approval because let’s face it – I am not a doctor, not an expert, not even a highly educated quack!
What Is Sphincterotomy?
Sphincterotomy is a difficult, delicate procedure. To make a long story short they put you to sleep, run a tube (with a blade) down your throat, into your common bile duct, down past your pancreatic duct to the sphincter found at the enterance to your duodenum. Then the surgeon cuts your sphincter. The video will show you what happens. Now this is a DUAL sphinchterotomy which includes doing the pancreatic duct as well which in my opinion (which isn’t and educated opinion) would almost guarantee or at least increase the probability, substanially, that the woman will later experience acute pancreatitis.
Sphincterotomy carries a fairly high risk of complications. 5% – 15% of patients experience complication [4,5]. Acute pancreatitis (mild, moderate or severe) is one of the possible and most common complications. Other complications include hemorrhage, perforation, cholangitis, cholecystitis, death and various other issues. In one study of 2347 patients, 229 (9.8 percent) had a complication, including pancreatitis in 127 (5.4 percent) and hemorrhage in 48 (2.0 percent). There were 55 deaths from all causes within 30 days; death was directly or indirectly related to the procedure in 10 cases . The sad part is that sphincterotomy only works on about 50% of those who have it done. In my opinion it is a dangerous crap shoot.
Of course, as always, if you have been diagnosed with Sphincter of Oddi dysfunction you need to determine what treatment is right for you. I need you to complete understand that I am NOT giving you advise. I’m giving you information along with my uneducated opinions. You need to do your own research and ask your doctor a lot of direct, pertinent questions. However …
If it were me I think I’d choose a safer route first, especially since SOD has been found to respond to a low fat diet just as do pancreatitis and gallbladder disease. I’d probably also use grape seed extract and grape fruit seed extract (or juice) not only to help relieve symptoms by decreasing any inflammation but to also help protect the pancreas from acute pancreatitis.
Sphincter of Oddi Diet – I Have SOD What Can I Eat Safely?
I imagine many people who suffer from sphincter of Oddi Dysfunction often wonder “I have SOD what can I Eat Safely?”
If you read what others write about a diet for sphincter of oddi dysfunction you’ll read “No” because all people are different. That there is no perfect SOD diet because people are all different and …
This is true to the extent that there are 3 types or classifications (1,11,111) of sphincter of oddi dysfunction which probably (I’n guessing here) determine what foods are or are not acceptable. There really isn’t any concrete, irrefutable knowledge when it comes to a perfect SOD diet. Yet …
I believe, in tackling SOD as I have pancreatitis via diet and supplements, there are certain points one can take as irrefutable when looking to perfect a sphincter of oddi dysfunction diet. Points that will help the largest number of people realize relief, even a “remission” of symptoms for a period of time.
One irrefutable point is that ALL biliary disease responds to a low fat diet. According to the Yale School of Medicine and John Hopkins SOD responds to a low fat diet.[6,7] When one reads that infamous schools of medicine actually say something, thought of as non-medical, such as diet, actually helps a condition improve the reader should most likely listen. Yet …
High Fat foods may NOT be the only food type that creates symptoms.
The reason foods may create symptoms is because of increased bile flow. Increased bile flow from the liver to the gallbladder may cause the gallbladder to release more bile and/or any stones and sludge that may also be harbored within the gallbladder itself.
If there are stones or sludge within the gallbladder increased bile flow could spark gallbladder inflammation, cause the stones and sludge to pass which could also cause gallstone pancreatitis (not good) and/or cause the sphincter of oddi to “spasm” and in trun cause more pain, symptoms or acute pancreatitis. None of the above is good. Yet …
Stagnant bile can also cause problems such as gallstone formation, even inflammation and infection so it’s a “catch 22” isn’t it? So seriously …
What Foods Should Be Avoided When You Have SOD?
1) Any foods high in fat. The list is long but here is a partial list: Beef, pork, lamb, duck, goose,processed meats egg yolk, butter, mayo, margarine, cooking oil, olive oil, oil. Also …
Nuts (all kinds), avocado, coconut, peanut butter, pastries (doughnuts, cake, cookies, pie, etc). Processed foods (soups, drinks, fast foods) are another source of hidden, high fat. High fat foods, whether those fats are “good fats” or “bad
fats” irritate components of the digestive system (liver, gallbladder, pancreas, and the sphincters).
High fat foods cause increased amounts of bile to flow. Yet …
Any foods are going to cause bile to flow because bile, along with pancreatic juice, help digest foods we eat. So, as with pancreatitis, patients with SOD should learn to eat to live versus living to eat. Food is NOT your friend.
I should point out at this juncture that doing a food diary is essential to determine exactly what foods you tolerate and those you do not tolerate well. And you should avoid all foods that you do not tolerate. There is only ONE way that I know of for sure to find out which foods other than those already listed that you do or don’t tolerate and that is by doing a food diary with the initial prep.
Without the prep you may as well not even do a diary. Cleansing your digestive tract of ALL food, whether offensive or not (which at this point you don’t know for sure), is imperative to success.
The East Indian spice Turmeric increases bile flow. It increases it enough that SOD patients should probably avoid it along with curcumin which is concentrated curcuminoids and is made from the turmeric root. Avoid foods made with turmeric (curries, sauces, mustard).
Other foods implicated for an increased release of bile include:
I find it hard to believe that honey, radish, celery and carrot can be offensive but who knows? How correct the implications are I have no clue because I have searched and searched for information (concrete scholar type) and have found very little. So, I am going to say this again …
If you have been diagnosed with sphincter of oddi dysfunction food is not your friend and you need to do a food diary, including the proper prep before starting!
What Else Should I Avoid If I Have Sphincter of Oddi Dysfunction?
Before there was ERCP with manometry physicians used to use what was called the Nardi Test. It was simply a test that involved two drugs. Morphine and prostigmine. This helped them diagnose SOD in the earlier days. The test has now been discontinued. But …
The fact that morphine makes the Sphincter of Oddi spasm and provocates it, even causing acute pancreatitis in many cases, should give one pause. Abstaining from narcotics especially those derived from morphine would likely be a very good idea. Instead of narcotics I would suggest large doses of grape seed extract, 800 – 1200 mgs of Ibuprofen and a really good nausea medication.
I can speak from experience how NOT fun the Nardi Test is simply because that is how Doctor Langdon diagnosed me with acute pancreatitis. The interesting thing is he never mention sphincter of Oddi Dysfunction but I have often wondered whether or not that was part of my problem. As IF I don’t have enough to contend with lol. That may be the reason narcotics did NOTHING for me and why Ibuprofen works so well in comparison. Even though he didn’t mention it (or if he did I missed it!) yet he prescribe a synthetic anticholinergic agent (Robinul). Who knows? I don’t, not for sure. Yet, if you have been diagnosed with SOD it may be wise to avoid narcotics that seem to aggravate SOD, sphincter of oddi dysfucntion.
1) Papilla of Vater: structure and function – Read here
2) Sphincter of Oddi dysfunction – Read here
3) Complications of sphincter of Oddi manometry: biliary-like pain versus acute pancreatitis – Read here
4) Complications of Endoscopic Biliary Sphincterotomy – Read Here
5) Complications of endoscopic biliary sphincterotomy – Read here
6) Sphincter of Oddi dysfunction: SOD after EPISOD, Now what do we do ? Read here
Priya A. Jamidar, M.D., FASGE
Professor of Medicine,
Director of Endoscopy
Yale School of Medicine
7) Gastroenterology and Hepatology – FAQs about Sphincter of Oddi Dysfunction – Read Here
John Hopkins Medicine