Dr. Callery

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About Dr. Callery

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    San Diego, CA


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  1. When blood sugar drops, people get an adrenalin surge. This causes rapid heart rate, sweating, and anxiety. People do often wake up if they are hypoglycemic. But sometimes they do not. The sugar can fall far enough and fast enough that the brain goes into a stupor, coma, sometimes convulsions, and death without fully awakening the patient. The patient could partially awaken, but not have the mental capacity to recognize the situation. Rare, but scary.
  2. VSGJV, Erratic changes in heart rate are not normal. The may or may not be pathological, but are not normal. You did the right thing by seeking medical attention. If they continue ask your APN to refer you to an internist or cardiologist for further evaluation. Dr. Callery
  3. Dear Obsidian, 1. You should only go to surgery if and when you are ready. No one should push you into it. And you shouldn't push yourself. There certainly are risks to surgery as well as benefits, and there are heavy patients who clean up their diet, exercise regularly, and lead very satisfying lives. They have the latitude to eat and celebrate as they wish. They may shorten their life expectancy and incur accelerated health problems, but it's a trade off. They have more freedom and no short term or long term surgical risks or side effects. 2. Oral anti-appetite drugs help people lose 5 - 10 % of their body weight over the short run. They are costly (up to $200 per month). They do not have proven long term (5-year) efficacy. Perhaps they can be used to help sustain weight loss if a patient who has lost weight goes through an emotional rough patch. They may help a person jump start or augment weight loss. 3. There are 3 brands of gastric balloons available that help provide similar short term weight loss. They may help patients lose up to 20% of their weight. They are expensive ($8-10,000)and cary some risk and discomfort. When the balloons are removed, eventual weight regain seems almost inevitable. 4. 90-95% of patients who lose weight by calorie restriction regain it. However some do keep it off. Perhaps through real dedication you can be one who does. So, if you have really cleaned up your diet, your activity, your sleep, and your stress levels, you might try an oral agent as an adjunct to weight loss. Know that you can't take the drugs forever, and that at some point you're going to have to stop and keep a very close eye on the scale. Only when your are truly satisfied that you have made a maximum effort and believe that the long term benefits outweigh the risks of surgery should you move forward. Disclaimer: These points reflect fairly well informed personal opinion. Other physicians or surgeons will have a spectrum of thoughts on the matter. Dr. Callery
  4. Dear Elisa, Post op weight loss is a long term proposition. Much of the early weight loss is loss of excess water weight. The first 20 or 30 pounds usually goes quickly, and then weight loss slows down. Almost nobody loses weight in a smooth way. The weight goes down a little, then there's a pause. Then there is more weight loss, then another pause. If your weight is stable for a couple of weeks or more you're at a plateau, but day to day fluctuations in weight loss don't mean much. So take the long view. Over the long run, working out is helpful for overall health both physical and mental. However, weight loss comes from calorie restriction. If your weight stabilizes over several weeks, it means that you are balancing your calorie expenditure with calorie intake. To lose more weight, you have to consume fewer calories on a long term basis. Paradoxically bumping up the exercise does little to promote more weight loss directly. You burn calories when you work out, but use fewer calories during the rest of the day! Exercise builds muscle, improves mental health including self-esteem, promotes a focus on good diet, helps one to sleep better, keeps one off of the couch, turns the focus away from food, can build friendships, reduces lipid levels, promotes bone health, makes your heart stronger, reduces blood pressure a little, probably makes you think clearer, and more! But to repeat, eating fewer calories long term gets the weight down and later keeps it down. Join the "just don't eat it" club, and resign for the "clean plate club". Dr. Callery
  5. Dear Annegirl, Most of the time people gain a few pounds of fluid weight during the hospitalization. When you're under stress, your pituitary gland secretes a hormone called vasopressin, AKA, antidiuretic hormone. Vasopressin causes the kidneys to conserve salt and water. This is a defensive move by your body to conserve fluids. When the stress is resolved, the hormone is no longer secreted, and the kidneys let the excess water go. You urinate the excess fluids. You had complications, were under stress longer, and held on to more fluid. Most of the time the body takes care of this on its own. Once in a while a diuretic (water pill) is needed. The decision to use a diuretic is complicated, and you should consult with your surgeon rather than trying to treat your self. Post op headaches are not uncommon and can have many causes. Carrying the extra water weight may be a contributing factor. Your migraines may have kicked in, you might have had muscle related headaches from your position on the OR table and hospital bed, one of your medications may have affected you, and there are other causes that are less common. I ask my patients to let me know if they are having a headache so that I can work with them to sort it out and find a solution. Most people lose anywhere from 10 to 20 pounds during the first couple of weeks after surgery. This may include a few pounds of fat weight, but it is mostly water weight. People who have a lot of excess fluid on board before surgery usually lose more weight early on. People who have been sticking to a "liver shrinking diet" usually have less water weight, and consequently lose less during the first couple of weeks. As a rule, I tell patients not to worry much about how much weight they lose in the first 6 weeks. Some folks worry so much about it, and what really counts is your weight loss over many months and years. The weight that you lose in the early weeks doesn't predict your long term success. What really matters in the long run is a pattern of healthy eating, portion control, snack avoidance, and other lifestyle factors. Dr. Callery
  6. Dear Blameithonthegenes, A significant drop in blood sugar following meals or snacks is called reactive hypoglycemia. This phenomenon, also called late dumping, is seen in a substantial number of gastric bypass patients, and may also be seen occasionally after sleeve gastrectomy. At times blood sugars can drop dangerously low causing decreased mental status and even loss of consciousness. Fatal traffic accidents caused by decreased level of consciousness have been reported. Fatality from profound nighttime hypoglycemia is conceivable, but I have not seen it reported in the medical/legal literature. If a person is prone to reactive hypoglycemia, it would be wise to avoid eating anything for several hours before bedtime. Drinking water or other sugar free drinks is OK. It would also be wise to avoid large carbohydrate loads any time of the day. Eating smaller, low glycemic meals seems to be best. Real success with weight control comes with a true commitment to lifestyle change. I've included several up to date summaries of medical studies for further information. Dr. Callery ______________________________________________________________________ Surg Obes Relat Dis. 2016 Oct 17. pii: S1550-7289(16)30746-8. doi: 10.1016/j.soard.2016.10.007. [Epub ahead of print] Overall and cause-specific mortality after Roux-en-Y gastric bypass surgery: A nationwide cohort study. Gribsholt SB1, Thomsen RW2, Svensson E2, Richelsen B3. BACKGROUND: Few population-based studies provide data on mortality after bariatric surgery. We hypothesized that hypoglycemia could be an underdiagnosed cause of death. OBJECTIVES: To examine perioperative, all-cause, and cause-specific long-term mortality in Roux-en-Y gastric bypass (RYGB) patients versus population comparisons. SETTING: Danish nationwide population-based cohort study. METHODS: We included all 9895 patients who underwent RYGB during 2006-2010, and a 1:25 age- and gender-matched comparison cohort (n = 247,366) (0.3% lost to follow up). We compared mortality rates and computed mortality rate ratios (MRR) for all-cause and cause-specific mortality using Cox regression analysis. For deceased RYGB patients (n = 91), we conducted a detailed medical record audit. RESULTS: The perioperative (30-days) mortality after RYGB was .04% (4/9895). After 4.2 years, RYGB-related mortality (deaths due to intestinal obstruction/intra-abdominal leakage) was .15% (16/9895). All-cause mortality was very similar in the 2 cohorts (median age, 40.2 years; 21.7% men): RYGB cohort, .89% (n = 91); comparison cohort, .92% (n = 2204); MRR = 1.03 (95% confidence interval [CI], .84-1.27). Mortality due to suicide (2.78; 95% CI, 1.44-5.33), accidents (2.29; 95% CI, 1.16-4.54), gastrointestinal diseases (2.01; 95% CI, 1.06-3.84), and infectious diseases (1.75; 95% CI, .98-3.17) was higher in the RYGB cohort versus comparison groups, but mortality from cancer was lower (0.43; 95% CI, .27-.70). Our medical record audit indicated that 8% of deaths after RYGB (n = 7) were possibly hypoglycemia related. CONCLUSION: Perioperative mortality after RYGB is low in Denmark, and subsequent all-cause mortality is similar to that of matched comparisons. After RYGB, patients have substantially increased mortality due to external causes such as suicide, accidents, and possibly hypoglycemia. ________________________________________________________________________________________ Surg Obes Relat Dis. 2017 Feb;13(2):345-351. doi: 10.1016/j.soard.2016.09.025. Epub 2016 Sep 28. Postprandial hyperinsulinemic hypoglycemia after Roux-en-Y gastric bypass: an update. Øhrstrøm CC1, Worm D2, Hansen DL3. Roux-en-Y gastric bypass (RYGB) is an efficient treatment for morbid obesity and reduces obesity-related co-morbidities. With the growing number of patients undergoing gastric bypass, complications now demand further attention. Postprandial hyperinsulinemic hypoglycemia (PHH) after Roux-en-Y gastric bypass is a complex condition, characterized by increased glucose variability including both hyperglycemic and hypoglycemic values. PHH seems to be more prevalent than previously suggested and is highly dependent on the choice of diagnostic tool, which has not yet been standardized. Questionnaires, an oral glucose tolerance test, a mixed meal tolerance test, and continuous glucose monitoring have been used, each with their own advantages. The condition is further complicated by a large group of asymptomatic cases. Patients with symptoms of PHH after gastric bypass are characterized by exaggerated insulin and glucagon-like peptide-1 responses compared to asymptomatic operated patients. The counter-regulatory mechanisms responsible for preventing hypoglycemia appear to be altered. The cause of these changes is not entirely understood, and it remains difficult to identify patients at risk of developing hypoglycemia. Known risk factors are female sex, longer time since surgery, and lack of prior diabetes. Management of the hypoglycemic episodes is difficult, and only dietary modifications consisting of frequent and less carbohydrate-rich meals seem to be efficient. Medical treatments and surgical procedures have been attempted in few studies and still warrant further examination. _________________________________________________________________________________ Surg Obes Relat Dis. 2015 May-Jun;11(3):564-9. doi: 10.1016/j.soard.2014.11.003. Epub 2014 Nov 13. Hypoglycemia after Roux-En-Y gastric bypass: detection rates of continuous glucose monitoring (CGM) versus mixed meal test BACKGROUND: Neuroglucopenic hypoglycemia might be an underestimated threat for roux-en-Y gastric bypass (RYGB) patients leading to fatigue, syncope, seizures or even accidental deaths. Different measurements can assess hypoglycemia such as a finger-stick glucometer, an Oral Glucose Tolerance Test, a Mixed Meal-Test (MMT) or, as introduced recently, continuous glucose monitoring (CGM). SETTING: University Hospital, Austria. METHODS: To assess the incidence of hypoglycemic episodes under real life conditions, 5-day CGM was performed in a series of 40 patients at a mean of 86 months after RYGB. The detection rates were compared to a mixed meal-test. RESULTS: Continuous glucose monitoring detected hypoglycemic episodes of <55 mg/dL or <3.05 mmol/L in 75% of the patients, while Mixed meal test indicated hypoglycemia in 29% of the patients. Continuous glucose monitoring also detected nocturnal hypoglycemic episodes in 15 (38%) of the patients. A mean of 3±1 hypoglycemic episodes per patient with a mean duration of 71±25 minutes were observed by CGM. CONCLUSIONS: Assessed under real life conditions by CGM, post-RYGB hypoglycemia was found more frequently than expected. CGM revealed hypoglycemic episodes in 75% of the patients while MMT had a lower detection rate. Thus, CGM may have a role for screening but also for the evaluation of dietary modifications, drug therapy or surgical intervention for hypoglycemia after RYGB. __________________________________________________________________ Obesity (Silver Spring). 2016 Jun;24(6):1342-8. doi: 10.1002/oby.21479. Risk of post-gastric bypass surgery hypoglycemia in nondiabetic individuals: A single center experience. Lee CJ1, Wood GC2, Lazo M3, Brown TT1, Clark JM3, Still C2, Benotti P2. OBJECTIVE: The epidemiology of post-gastric bypass surgery hypoglycemia (PGBH) is incompletely understood. This study aimed to evaluate the risk of PGBH among nondiabetic patients and associated factors. METHODS: A cohort study of nondiabetic patients who underwent Roux-en-Y gastric bypass (RYGB) was conducted. PGBH was defined by any postoperative record of glucose < 60 mg/dL, diagnosis of hypoglycemia, or any medication use for treatment of PGBH. Kaplan-Meier analysis was used to describe PGBH occurrence, log-rank tests, and Cox regression to examine associated factors. RESULTS: Of the 1,206 eligible patients, 86% were female with mean age of 43.7 years, mean preoperative BMI of 48.7 kg/m(2) , and a mean follow-up of 4.8 years. The cumulative incidence of hypoglycemia at 1 and 5 years post-RYGB was 2.7% and 13.3%, respectively. Incidence of PGBH was identified in 158 patients and was associated with lower preoperative BMI (P = 0.048), lower preoperative HbA1c (P = 0.012), and higher 6-month percent of excess body weight loss (%EWL) (P = 0.001). A lower preoperative HbA1c (HR = 1.73, P = 0.0034) and higher 6-month %EWL (HR = 1.96, P = 0.0074) remained independently correlated with increased risk for PGBH in multi-regression analysis. CONCLUSIONS: The 5-year incidence of PGBH among nondiabetic individuals was 13.3% and was associated with a lower preoperative HbA1c and greater weight loss at 6 months following surgery. ______________________________________________________________________ Ann Surg. 2016 Nov;264(5):878-885. Incidence and Predictive Factors of Postprandial Hyperinsulinemic Hypoglycemia After Roux-en-Y Gastric Bypass: A Five year Longitudinal Study. Raverdy V1, Baud G, Pigeyre M, Verkindt H, Torres F, Preda C, Thuillier D, Gélé P, Vantyghem MC, Caiazzo R, Pattou F. BACKGROUND: Postprandial hyperinsulinemic hypoglycemia (PHH) is often reported after Roux-en-Y gastric bypass (RYGB). In the absence of a prospective study, the clinical and biological determinants of PHH remain unclear. OBJECTIVE: To determine the incidence and predictive factors of PHH after RYGB. METHODS: Participants were 957 RYGB patients enrolled in an ongoing longitudinal cohort study. We analyzed the results of an oral glucose tolerance test (OGTT) routinely performed before surgery and 1 and/or 5 years after. PHH was defined as blood glucose < 50 mg/dL AND plasma insulin > 3 mU/L at 120 minutes post glucose challenge. Validated indices of insulin sensitivity (Matsuda index), beta-cell function (Insulinogenic index), and beta-cell mass (fasting C-peptide: glucose ratio) were calculated, from glucose, insulin, and c-peptide values measured during OGTT. RESULTS: OGTT results were available in all patients at baseline, in 85.6% at 12 months and 52.8% at 60 months. The incidence of PHH was 0.5% at baseline, 9.1% * and 7.9%* at 12 months and 60 months following RYGB (*: P < 0.001). In multivariate logistic regression analysis, PHH after RYGB was independently associated with lower age (P = 0.005), greater weight loss (P = 0.031), as well as higher beta-cell function (P = 0.002) and insulin sensitivity (P < 0.001), but not with beta-cell mass (P = 0.381). A preoperative elevated beta-cell function was an independent predictor of PHH after RYGB (receiver operating characteristics curve area under the curve 0.68, P = 0.04). CONCLUSIONS:: The incidence of PHH significantly increased after RYGB but remained stable between 1 and 5 years. The estimation of beta-cell function with an OGTT before surgery can identify patients at risk for developing PHH after RYGB.
  7. Dear Connie77, I can't give personal medical advice, because I don't know all the details of your situation. Here are some general points. Lap gastric bypass after Nissen fundoplication is feasible, but is one of the most technically advanced bariatric procedures. The Nissen wrap is taken down (unwrapped. If there is a recurrent hiatus hernia, it is repaired. Then the gastric bypass is performed. There is usually a lot of scar tissue, and it very tricky to unwrap the stomach safely. The biggest risk is damage to the esophagus causing a leak followed by a stomach staple line leak. The complication rates reported in the medical reports have been high. I have a lot of respect for the difficulties that can be encountered with this procedure. As a general rule, I don't think a sleeve is a good choice in this situation for a number of reasons. I haven't seen any reports of leaving the Nissen intact and doing a bypass under it. I've included a couple of abstracts from the surgical literature regarding GBP after Nissen fundoplication. Some surgeons are performing combination anterior fundoplication/sleeve procedures for patients with reflux. I included one summary below. I haven't seen any reports of doing a fundoplication/sleeve after takedown of a Nissen. I hope this information helps. Dr. Callery Acta Chir Belg. 2015 Jul-Aug;115(4):268-72. The Efficacy of Laparoscopic Roux-En-Y Gastric Bypass after Previous Anti-Reflux Surgery: A Single Surgeon Experience. Gys B1, Gys T, Lafullarde T. BACKGROUND: In this study we assessed feasibility, weight loss results and recurrence of Gastro-Oesophageal Reflux Disease (GORD) in patients undergoing laparoscopic Roux-en-Y Gastric Bypass (RYGB) after previous anti-reflux surgery. METHODS: Retrospective analysis of prospectively collected data was performed for patients undergoing laparoscopic RYGB after previous anti-refux surgery between 1/1/2000 and 1/1/2015. Weight loss was assessed using %Excess Weight Loss (%EWL) and every patient was compared with two matched control subjects. Telephone interviews were conducted to assure maximum follow-up data. Quality Of Life (QOL) was assessed using the Gastro-Intestinal Quality of Life Index (GIQLI), Gastro-intestinal Symptom Rating Scale (GSRS) and Bariatric Analysis and Reporting Outcome System (BAROS). RESULTS: A total of 18 patients (11 female, 7 male) were identified (17 Nissen and 1 former Belsey-Mark IV fundoplication). Mean time between surgical interventions was 9.4 years. Laparoscopic RYGB was feasible without intra-operative complications. One patient needed relaparoscopy for falsely suspected leakage and another suffered from postoperative pneumonia. Symptomatic GORD after RYGB was reported by 3 patients (16.7%). QOL was rated good with a GIQLI-score of 118 (range 97-140), GSRS score of 33 (range 15-59) and BAROS-score of 4,6 (range 1.2-6.8). EWL 3 years after surgery was comparable with matched control subjects (80.1% vs. 79.2% in controls, P=0.70). CONCLUSIONS: Laparoscopic conversion of anti-reflux surgery to RYGB with breakdown of the fundoplication is feasible and safe. Weight loss results are equal to control subjects and treatment of GORD is good. No significant decrease in QOL was reported. _____________________________________________________________________ Surg Endosc. 2012 Dec;26(12):3521-7. doi: 10.1007/s00464-012-2380-7. Epub 2012 Jun 13. Laparoscopic fundoplication takedown with conversion to Roux-en-Y gastric bypass leads to excellent reflux control and quality of life after fundoplication failure. Stefanidis D1, Navarro F, Augenstein VA, Gersin KS, Heniford BT. BACKGROUND: Recent data suggest that reoperative fundoplication is associated with poor long-term control of reflux. For long-term reflux control, laparoscopic Roux-en-Y gastric bypass (LRYGB) may be a better option. This study assessed outcomes and quality-of-life data after fundoplication takedown and conversion to LRYGB for patients with failed fundoplications. METHODS: After institutional review board approval, the medical records of 25 patients who underwent fundoplication takedown and LRYGB conversion between March 2007 and July 2011 were reviewed. The data recorded included patient demographics, body mass index (BMI), preoperative symptoms, operative duration and findings, hospital length of stay (LOS), estimated blood loss (EBL), length of the follow-up period, and postoperative outcomes. The gastrointestinal quality of life index (GIQLI) and the gastrointestinal symptoms rating scale (GSRS) were used at the most recent follow-up visit to assess symptom severity and quality of life. RESULTS: The patients in this study had undergone 40 total prior antireflux surgeries. They had a median age of 55 years (range 36-72 years), a BMI of 34.4 kg/m(2) (range 22-50 kg/m(2)), an operative duration of 345 min (range 180-600 min), an EBL of 181 ml (range 50-500 ml), and an LOS of 7 days (range 2-30 days). Five patients had concomitant incisional hernia repair. There was no mortality. Of the 10 patients (40%) who had had complications, 5 required reoperation. During a 14-month follow-up period (range 1-48 months), 96% of the patients were reflux-free with a GIQLI score of 114 (range 80-135) and a GSRS score of 25 (range 17-45). Excess weight loss was 60%, and comorbidity resolution was 70%. Most of the patients (96%) were satisfied with their outcome and would undergo the surgery again, and 62% reported that their personal relationships and sexual life had improved. CONCLUSIONS: Patients who undergo LRYGB after failed fundoplications have excellent symptomatic control of reflux, excellent quality of life, and high rates of satisfaction with their outcome. Nevertheless, because the procedure is challenging and associated with considerable morbidity, it should be performed by surgeons experienced in antireflux and bariatric surgery. ________________________________________________________________________________ Surg Obes Relat Dis. 2016 Oct 17. pii: S1550-7289(16)30747-X. doi: 10.1016/j.soard.2016.10.008. [Epub ahead of print] Safety and effectiveness of anterior fundoplication sleeve gastrectomy in patients with severe reflux. Moon RC1, Teixeira AF1, Jawad MA2. BACKGROUND: Laparoscopic sleeve gastrectomy has become a popular bariatric surgery in recent years. However, it has been linked to worsening or newly developed gastroesophageal reflux disease (GERD) in the postoperative period. OBJECTIVES: The purpose of this study is to determine the safety and effectiveness of anterior fundoplication sleeve gastrectomy in patients with reflux. SETTING: Academic hospital, United States. METHODS: We prospectively collected data on 31 sleeve gastrectomy patients who concurrently underwent anterior fundoplication between July 2014 and March 2016. Patients were selected when they reported severe reflux before the procedure. Each patient was interviewed using the GERD score questionnaire (scaled severity and frequency of heartburn, regurgitation, epigastric pain, epigastric fullness, dysphagia, and cough) before and 4 months after the procedure. RESULTS: Our patients comprised 27 females and 4 males with a mean age of 49.9±9.6 years (range, 29-63 yr). They had a mean preoperative body mass index of 42.8±5.6 kg/m2 (range, 33.3-58.4 kg/m2), and 67.7% (n = 21) of these patients underwent hiatal hernia repair as well. Preoperatively, patients had a mean heartburn score of 7.4±3.6 (range, 1-12), regurgitation score of 5.4±4.1 (range, 0-12), epigastric pain score of 2.1±3.2 (range, 0-12), epigastric fullness score of 2.7±3.9 (range, 0-12), dysphagia score of 1.3±2.2 (range, 0-9), and cough score of .9±1.8 (range, 0-6). Mean preoperative GERD score was 18.9±9.8 (range, 6-36) in these patients. Patients were interviewed with the same questionnaire approximately 4 months postoperative. Patients had a mean heartburn score of 1.5±3.2 (range, 0-12), regurgitation score of .9±1.7 (range, 0-8), epigastric pain score of .4±1.1 (range, 0-4), epigastric fullness score of 1.1±2.4 (range, 0-8), dysphagia score of .3±1.1 (range, 0-6), and cough score of 0. Mean postoperative GERD score dropped down to 4.1±5.8 (range, 0-28), and the difference was statistically significant (P<.01). One patient was readmitted 28 days later for a staple line leakage, and was treated conservatively. No patient required a reoperation due to the procedure within 30 days. CONCLUSION: Anterior fundoplication sleeve gastrectomy may be a safe and effective alternative in obese patients with severe reflux who want to undergo sleeve gastrectomy.
  8. Dear Brenda, Several things can happen as time goes by. Your pouch can stretch a little. The gastrojejunostomy (the connection of pouch to the small intestine) can widen. You can change your dietary habits to accommodate more food. You can eat richer food with more calories per serving. There may be changes in your internal metabolic signaling that alter your weight set point and make you hungrier. All of these changes can result in greater calorie intake and result in weight regain. One way to estimate your "pouch size" is to obtain an 8 or 12 oz container of large curd cottage cheese and see how many ounces you can eat in 5 minutes. Another way is to undergo an upper GI series with food. You bring a sandwich to the x-ray lab. The radiologist does an initial barium swallow. Then the technician puts some barium paste on the sandwich. You eat the sandwich. You and the radiologist see how big the pouch is and how wide the stomach-small bowel connection is when the food enters the stomach. It's a great educational experience if you can watch it on a monitor. Once you see what's going on you will be able to change your behavior to optimize your eating. Doing revision surgery to make the pouch smaller or decrease the size of the gastrojejunostomy is controversial. It may help for a while, but all too often the effects are minimal and short lived. Many people adjust their eating style and don't lose or keep off much additional weight. There may be isolated cases where pouch or anastomosis reduction procedures have beneficial long term results, but there's not much in the surgical literature to support these procedures. I've attached an article which you can download that summarizes causes and treatments of weight regain after gastric bypass. Obes Surg. 1996 Feb;6(1):38-43. Measurement of Functional Pouch Volume following the Gastric Bypass Procedure. Flanagan L1. Abstract BACKGROUND: The cottage cheese test was developed in an attempt to find a simple way to measure functional pouch volume and to better understand the fate of the tiny proximal pouch following the gastric bypass procedure. METHODS: Our patients were asked to eat cottage cheese in a structured fashion before their return visits from 3 months to 2 years postoperatively. RESULTS: We found there was a step-wise progression of increase in functional pouch volume with statistical significance between each time interval. Also, we compared the patients' excess weight loss at 1, 2, and 3 years postoperatively to their pouch size at 1 year postoperatively. Although there is a wide range (2.5-9.0 oz) of pouch sizes at 1 year, there is no significant difference in excess weight loss between the smaller and larger pouches. CONCLUSIONS: The pouches enlarge by the orderly process of hyperplasia. Within the 2.5-9 oz volume variation, the pouch volume alone is not a predictor of weight loss. Rather, how the patient uses the pouch/tool, in addition to the other behavior modifications, determines the degree of weight loss. This data strongly suggests that the surgeon's understanding of and teaching of the optimal use of the pouch/tool may be more important than previously thought. Maleckas 2016 Weight regain after gastric bypass.pdf
  9. Dear Bigfuzzy, Contact your surgeon's office and ask the office to send you a list of the blood tests that he or she recommends. I can't comment on your particular medical situation or give you personal recommendations. The routine blood work that we generally recommend for patients every 6 months is as follows: -CBC, Chemistry panel -Iron, TIBC -Vitamins A, B1, B12, D -Whole molecule parathyroid hormone -Bone density studies on selected patients Many PCPs will also get a lipid panel and HgA1C when appropriate. It's very important to remember that each patient is different. So we tailor our recommendations accordingly. The attached guidelines are provided by our surgical society, the American Society for Metabolic and Bariatric Surgery, the Obesity Society, and the American Association of Clinical Endocrinologists. Feel free to download the file, print it, and share it with our doctor. Follow up recommendations start on p. 177, R42. I hope you and your doctor find this material useful. Dr. Callery AACE_TOS_ASMBS_Clinical_Practice_Guidlines_3.2013.pdf
  10. Dear Tg, As a general rule, it's good to see your PCP first. Your surgeon is there if there is a surgical emergency or if there is a problem that your PCP and specialists such as a gastroenterologist can't sort out or treat. Your PCP or GI consultant can always call you surgeon if she or he has questions. Dr. Callery
  11. Hi Dr. Callery,

    you did my bypass in 2004. I weighed 257 at the time. 12 years later I have kept most of the weight off, I weigh 155. I consider myself a success!

    An endoscopy yesterday shows an ulcer at the surgery site with one or two of the staples in the ulcer(for lack of a better way to describe it.)

    i have been prescribed a protonix. What typically happens next? 

  12. I think I have co-morbidities but they are not diagnosed (PCOS, sleep apnea). My BMI is 41.5. Should I get them diagnosed so my insurance will be less likely to decline me?

  13. I have questions about gastric bypass reversal. Need answers 

  14. Hi dr. Since I saw your last post, have you still seen positive results with weight loss surgery to relieve gastroparesis..any difference between bypass and vsg?

    Thx you,


  15. Dear JoeG, Inadequate weight loss 10 months after sleeve gastrectomy is extremely frustrating. The sleeve may be too large to be effective, you may be eating more than you realize, or both. An upper GI series with food is an effective way to evaluate sleeve size. If it really is too large, then going back and recutting the sleeve is a reasonable option. Any type of revision surgery is riskier than initial surgery because of scar tissue. The staple line leak rate is increased several fold over primary surgery. I did a search of the medical literature on PubMed, and couldn't find any medical articles describing the success or complication rates of resleeving. Another option would be to convert the sleeve to a gastric bypass. This might be easier technically and perhaps safer depending on the shape of the upper part of the sleeve and the amount of scar tissue present. It could be a fall back option if your surgeon finds too much scar tissue at the time of the resleeve procedure. Also it might be better if you have significant diabetes. Again, there is little data in the medical literature to inform these decisions. So in summary, resleeving can be a good option. You may achieve much better long term success. You just want to be absolutely sure that your dietary choices aren't the real issue. Patients who are snacking, comfort feeding, and eating a high carb diets frequently continue to do so after revision. For success: good surgery and good choices. Dr. Callery