Tag: gastric bypass
Sphincter of Oddi Dysfunction
April 26, 2026 8:43 am
Description:
Sphincter of Oddi Dysfunction (SOD) is a clinical syndrome characterized by biliary/ pancreatic pain from abnormal function or obstruction of the.
Diagnostic and classification
- The SOD spectrum includes biliary, pancreatic, or combined sphincter dysfunction, with symptoms driven by dyskinesia or mechanical obstruction. The term SOD encompasses both functional motility disorders (biliary or pancreatic sphincter dysfunction) and mechanical obstructions such as papillary stenosis.
- SOM has been considered the gold standard for diagnosing elevated basal sphincter pressure. It is invasive and carries complications, including pancreatitis. SOM can also not be done in those who have had gastric bypass or duodenal switch operations. Sphincterotomy outcome is not uniform. Consequently, many centers have moved toward empiric endoscopic therapy for appropriately selected patients and toward noninvasive or less invasive diagnostic approaches for others.
Treatment approaches
- Endoscopic biliary sphincterotomy (EST) is the most established nonpharmacologic treatment for biliary SOD, particularly in type I and many type II patients with objective ductal dilation and/or enzyme elevation.
- In type II SOD, outcomes after EST correlate with objective evidence of obstruction or sphincter hypertension on SOM. Empiric sphincterotomy without manometry is controversial.
- Type III SOD has emerged as predominantly functional pain rather than a mechanical obstacle. Alternative management emphasizes risk stratification, noninvasive strategies, and multidisciplinary approaches.
- Medical and non-sphincterotomy options (calcium-channel blockers, nitrates, antidepressants, and lifestyle modifications) have been discussed as potential adjuncts or alternatives.
Summary
- SOD is a multifactorial biliary and pancreatic sphincter disorder with a spectrum from mechanical obstruction to pure dyskinesia. Type I and II retain treatment relevance, particularly EST for biliary obstruction. Type II management requires clear identification of the cause.
- SOM is a diagnostic tool with significant limitations.
- Endoscopic sphincterotomy offers meaningful symptom relief in type I and select type II with objective obstruction. It carries a risk of complications, including pancreatitis; risk mitigation strategies are integral to practice. In type III SOD, sphincterotomy generally has limited benefit, necessitating a move toward noninvasive management and careful patient counseling. Patients post- gastric bypass, or duodenal switch, can not have ERCP or SOM done.
Types of HyperParathyroidism
February 20, 2026 4:05 pm
There are 4 parathyroid glands which are located behind the thyroid gland, among other functions, are the main regulators of calcium, phosphorous, and magnesium in the blood. Elevations of parathyroid hormone (hyperparathyroidism) can be: 1-Primary, 2-Secondary, 3-Tertiary
Primary hyperparathyroidism means the parathyroid glands themselves are hyperactive. This may involve only one of the four glands: a) an adenoma, a benign tumor that needs surgical removal, or b) hyperplasia, when all 4 glands are hyperactive and/or enlarged, and in some cases, most of the 4 glands need to be removed.
Secondary hyperparathyroidism means that the elevated PTH level is caused by an external regulatory stimulus, such as low calcium, which itself may be due to low vitamin D, low calcium intake, or other causes.
Tertiary hyperparathyroidism is seen only in specific renal failure and transplant patients.
Regardless of the type of hyperparathyroidism, the end result is the same. Because the parathyroid gland aims to maintain normal calcium levels, it will do everything to achieve them. This includes increasing calcium absorption from the GI tract, breaking down bone to increase the blood calcium supply, and increasing calcium reabsorption from the urine.
Distinguishing between primary and secondary is critical, as primary is more likely than not a surgical problem that needs to be addressed. Secondly, it may be responding to metabolic deficiencies (low CA, low Vitamin D) that need to be corrected and take some time.
Not all cases require surgical intervention, as labs (vitamin D, calcium, and alkaline phosphatase) and imaging studies, such as neck ultrasound, CT scan, and Sestamibi scan, provide the information needed to dictate the treatment plan. Please stay up to date with your yearly lab results to catch changes sooner rather than later.
Should Adjustable Gastric Banding (Lap Band) be done?
October 06, 2024 9:17 pm
The Lap Band was approved in the US in 2001 (BMI> 40). The following studies used only small samples and examined short-term efficacy and safety. They were then performed to consider the utility of the Laob band for patients with lower BMI (BMI 30-40). 
- The Lap Band does not result in long-term sustained weight loss.
- Lap band has significant complications, some of which may not be reversible.
- The lap band can be removed, but eroding the banc to the stomach is not easy.
COVID Vaccines
March 05, 2021 3:50 pm
There are no known contraindications from a weight-loss surgical perspective to prevent a post-surgical patient from getting the COVID vaccines.
A patient who has had a Duodenal Switch, Lap Sleeve Gastrectomy, RNY Gastric Bypass, or revisions to Weight Loss Surgery should have the COVID vaccine. The vaccination should be avoided for a few weeks after surgery. For other possible contraindications, please consult your PCP.
Here is a summary of the vaccines and the details of each one approved as of the publication date.
Physical Activity in US
November 28, 2020 1:41 pm
Physical activity in the U.S. varies based on geographic location, socioeconomic status and in comparison to other countries. It is important to know that physical activity is an important component of our well-being. However, this does not mean that going to the gym is the only way to be physically active.
Strain et al. Shows that different populations in different countries get their activity from different sources.
His research showed that the United States population ranked as a high-income country, ranks in the lower 1/3 of the number of countries surveyed with regards to the meeting minutes of moderate-to-vigorous physical activity (MVPA) per week. This may be a contributing factor to the significant rise in obesity in the United States. Individually we should all aim to increase our moderate to vigorous activity significantly.
Vitamin D and Covid -19
May 07, 2020 9:24 am
We are all aware of the many roles that Vitamin D plays in our bodies. This includes immune function in addition to all the regulatory roles that Vitamin D plays in several physiologic reactions. There may be a correlation of low Vitamin D and COVID-19 infection increasing death risk as looked at in research articles.
Covid -19 in a subset of patience causes significant lung injury. These patients require mechanical ventilation.
Previously reported publications have suggested a possible correlation between ace inhibitors and increased risk of pulmonary complications of Covid -19. Some researchers suspect that the Covid-19 may be able to enter lung cells by the ACE receptors.
Vitamin D may positively implact the receptor ACE2. This study, report clear correlation between the high death rate with low vitamin D levels in Covid infected patients. There are limitation to this study that the attached abstract outlines.
Our take home message would be to please make sure you have updated labs and that you are all taking the recommended Vitamin D based on your surgical anatomy and laboratory values, not just an average non-bariatric person recommended dose.
https://www.dssurgery.com/wp-content/uploads/2020/05/manuscript.pdf
Diabetes and Weight Loss Surgery
April 06, 2020 5:51 am
The scientific literature is riddled with evidence pointing to the benefit of early metabolic surgery as a superior treatment, remission and possible cure option for diabetes. Unfortunately, the medical education, pharmaceutical companies, primary care healthcare delivery systems and third party payers (health insurance companies) have not caught up with the published data. The American Diabetes Association has changed their guidelines to reflected the benefit for combating diabetes with weight loss surgery.
There is ample evidence of the superior outcome of surgery as a treatment option for diabetes when compared to medical managment. Cummings et.al, in a published article in Diabetes Care, showed sustained stabilization of the Hemoglobin A1C six years after surgery. In contrast, there was no significant changes noted in the non-surgical group.
Jans et.al. , in November of 2019 showed that the patients who had NOT been on Insulin, and had metabolic surgery had the highest long term success for resolution and remission of the diabetes. This identifies that having a patient be proactive in their care by having metabolic surgery improves success rates.
The exact mechanism by which the diabetes is resolved is unclear. The weight loss may play a role. There are numerous hormones and neuroendocrine modulators which control the complex metabolic pathways. Batterham et.al., in Diabetes Care (2016), published a summary overview of the possible mechanism involved in diabetes improvement following metabolic surgery.
There are a number of overlapping and sequential layers for possible reasons why diabetes resolves after weight loss/metabolic surgery. These may be directly related to surgery and the reduction of the calorie intake or absorption. It may also involve the neuroendocrine modulators.
What can be said definitively is that early surgical intervention is best and most likely the only permanent solution to type II diabetic resolution. There is no medical justification in not considering metabolic surgery in diabetic patients who may also have difficulty with meaning a BMI< 35.
Medication Absorption After Weight Loss Surgery
March 30, 2020 8:01 am
Weight loss surgical procedures, in one form or another, achieve the desired effect of weight loss by altering absorption of fat, protein, and carbohydrates. This results in decreased total absorption of required calories.
An unintended consequence is the altered absorption of medications. Frequently I am asked about the specific medication. Usually the answer is vague since the information is limited on specific medications. If the desired effect is not achieved, then it is probably not being absorbed well. Specially, if the same dose of the same medication working well before surgery.
There is a summary article about the Theoretical absorption pattern of different weight loss surgical procedures.
Vitamin D Metabolism and Deficiency file
March 28, 2020 8:17 am
It’s important to understand Vitamin D metabolism and deficiency potential following weight loss surgery Vitamins after DS need to be followed via laboratory blood studies. There are basic vitamin needs but individual needs should be based on medical history, genetics, alimentary limb length, common channel length and other surgical and physiologic determinations. Vitamins after DS are a life long commitment as well as protein needs and hydration. Duodenal Switch is a malabsorptive procedure which requires at least yearly laboratory blood studies, daily vitamins/minerals, daily high protein and daily hydration intake. There is not an all in one vitamin that is adequate for a DS patient or tailored to your individual needs. (example: you may need more Vitamin D and less Vitamin A if you are taking a all-in-one vitamin you can’t get more of one and less of another vitamin)
DS patients are recommended to take Dry forms (water miscible form) of Vitamin A, D3, E, K due to the fat malabsorption after DS. Dry formulations by Biotech are processed so they can be absorbed by a water soluble method after the DS procedure. Vitamin D seems to be the vitamin that can become deficient the easiest, followed by Vitamin A. Take these vitamins away from dietary fat.
In some cases, patients may need injectable Vitamin A or D to improve vitamin levels.
Click the links to view the information below and within the comments of this file:
Vitamin D3 50 by Biotech: Amazon
directly from BioTech:
Many DS surgeon’s do not recommend Children’s vitamins or chewable vitamins unless there is a specific reason or need for them.
DS Surgeon Blog on Vitamin D:
Webinar on Vitamin D metabolism:
Medications that effect Bone health:
This does not constitute medical advice, diagnosis or prescribing. It is simply a compiled list of gathered information. If you are in doubt or have questions please contact your medical healthcare professional.
Articles
March 22, 2020 6:57 pm