Weight Loss Surgery Center

Weight loss surgery center at plymouth general surgery a department of speare memorial hospital

Medical science has determined that weight loss surgery saves lives. Can it save yours or the life of someone you know?

Is your health at risk because of your weight?

Have you tried to lose weight without success?

Are you ready to be your healthy best?

There’s a treatment.

It’s time.

Take the first step by attending an info session:

The Second Thursday of every month from 5 – 6 pm
103 Boulder Point Drive
Plymouth, NH
Call us at 603-536-5670 to reserve your spot, or fill out the form below.

*Please click here to print the New Patient Health Questionnaire and bring the completed form to the info session.

Weight Loss Info Sessions

*Please click here to print the New Patient Health Questionnaire and bring the completed form to the info session.

Obesity rates in the United States are the highest in the world, affecting over 70 million Americans. Many do not know that a cure is available.

We can help you obtain a life-long, healthy weight without the risks of past medications or the failures of past diets and exercise.


PHOTO L R Janette Gaumer RD LD Ryanne Haskell RD LD Robert Chastanet MD James Koren MD E. James Hanowell DO Lauren Sirignano RN BSN Becky Chase MS RCEP 1000
PHOTO (L R) Janette Gaumer, RD, LD, Ryanne Haskell, RD, LD, Robert Chastanet, MD, James Koren, MD, E. James Hanowell, DO, Lauren Sirignano, RN, BSN, Becky Chase MS, RCEP

You can trust our team of knowledgeable and compassionate professionals to help you achieve your weight loss and lifestyle goals.

Dr. Robert Chastanet specializes in laparoscopic surgery and has performed gastric bypass and sleeve gastrectomy weight loss surgeries for over a decade. 

Dr. James Koren is fellowship trained in bariatric surgery, having trained with Drs. Robert Brolin and Peter Geis, considered pioneers in bariatric surgery. 

Dr. E. James Hanowell has extensive bariatric surgical experience in a large academic medical center and specializes in advanced laparoscopic surgery.

You will also work with our nurse program coordinator, dieticians, exercise specialist, and other specialists committed to your success. You will benefit from the meaningful relationships you develop with our team as we support you throughout your weight loss journey.

SilouettesObesity is a complex health issue caused by many factors involving behavior and genetics. Behaviors can include dietary patterns, physical activity, inactivity, and medication use. Additional contributing factors in our society include the social environment, education and skills, and food marketing and promotion. Obesity is a serious concern because it is associated with poorer mental health and reduced quality of life. It is one of the leading causes of death in the US and worldwide, including diabetes, heart disease, stroke, and some types of cancer. Severe obesity is often hard to treat with diet and exercise alone.

You may be obese if you weigh more than what is considered healthy for your height. A body mass index (BMI) tool measures your weight in relation to your height to help determine if you are obese. Obesity is defined as having a BMI of 30 or more. A BMI above 40–which is about 100 pounds overweight for men and 80 pounds for women–indicates that you are severely obese.

BMI Chart

Obesity is a chronic disease that can damage organs in the body, resulting in disability or premature death. Up to 300,000 people in the Unites States die each year due to obesity-related conditions. Oftentimes, diet and exercise do not work for the long term, making weight loss surgery the best and only choice to lose weight and save lives. Conditions that obesity leads to include:

  • Arthritis
  • Asthma
  • Blood clots
  • Chronic low back pain
  • Degeneration of knees/hips
  • Depression
  • Diabetes
  • Disc herniation
  • Gallbladder disease
  • Gallstones
  • GERD (recurrent heartburn)
  • Heart failure
  • High blood pressure
  • High cholesterol
  • Increased infection
  • Infertility
  • Liver disease
  • Low quality of life
  • Menstrual irregularity
  • Premature death
  • Risk of cancer
  • Sleep apnea
  • Stroke
  • Urinary incontinence
  • Urinary tract infections (UTI)
  • Yeast infections

The benefits of weight loss surgery are immediate and ongoing. Medical and emotional benefits are experienced immediately after the surgery — many people have a greater sense of wellbeing and studies have shown blood glucose levels drop to the normal range. Most people lose weight rapidly following surgery and continue to do so for up to two years. While some people gain weight after that time, few regain it all. Weight loss surgery provides long term results.

Other benefits overtime include the improvement or cure more obesity-related conditions:

  • High cholesterol
  • High blood pressure
  • Sleep apnea
  • Hypertension
  • Diabetes
  • Cardiovascular disease
  • Osteoporosis
  • Thyroid problems
  • High fats in blood

The Weight Loss Center at Plymouth General Surgery is a low acuity program, meaning that you must meet the following criteria in order to be a candidate:

  • Ages 18-64
  • Males with a BMI up to 55
  • Females with a BMI up to 60
  • Able to move around and walk
  • No organ failure, transplant, or on transplant list
  • No significant cardiac or pulmonary impairment

The BMIs listed above are about 100 pounds overweight for men and about 80 pounds overweight for women. Weight loss surgery is also recommended for people with a BMI of 35 to 40 with life-threatening cardiopulmonary problems or diabetes. To be a candidate for weight loss surgery, you must have been unsuccessful at conventional weight loss programs such as diet, exercise, behavior modification, and medications. You must be motivated to really make it happen. You must commit to the weeks it takes to reach your goal and the years it takes for long term weight loss success. If this is you, you can be treated safely and effectively with weight loss surgery.

Eligible For Weight Loss Surgery

The surgeons at the Weight Loss Surgery Center perform two of the most common and successful weight loss procedures:

Both are laparoscopic (minimally invasive) procedures, meaning that our surgeons use advanced tools to work through small incisions that result in fewer complications and a more cosmetically pleasing appearance. Laparoscopy’s Benefits Include:

  • Smaller incisions
  • Reduced pain after surgery
  • Shortened hospital stay
  • Quick recovery
  • Reduced risk of infection

These surgeries are technically demanding and require the special training and experience that Dr. Chastanet, Dr. Koren, and Dr. Hanowell have acquired.

WLSC group just docs cropped

Digestive System

Each weight loss surgery is different. To understand how the procedures at the Weight Loss Center at Plymouth General Surgery are different from each other, it helps to begin by looking at the digestive tract. The stomach is located in the upper left part of the abdominal cavity.

StomachOnce food is chewed and swallowed, it moves down the esophagus, through the esophageal sphincter, and empties into the stomach. More specifically, it passes through the pylorus into the duodenum. Digestive juices and enzymes digest and absorb calories and nutrients along the way. Once in the duodenum, bile and pancreatic juice speed up the digestive process and calcium and iron are absorbed.

Small IntestineConnected to the small intestine, contents move from the duodenum to the jejunum and ileum, where almost all calories and nutrients from food are absorbed. Particles of food that can’t be digested in the small intestine are stored in the large intestine and eliminated.

Weight-loss surgery, as with any major surgery, has risks. Although surgical complications are rare, it is important for you to fully understand any potential risks so you can make an informed decision about whether or not to have the surgery.

Your surgical team will use their expertise and knowledge to avoid complications, and if a problem does occur, they will use those same skills to attempt to solve the problem quickly.

Some complications can involve an extended hospital stay and recovery period. It is important to know that weight loss surgery cannot be completely reversed.

The decision to have this procedure must be made in consultation with your surgeon and very careful consideration of the potential benefits and risks and lifelong consequences.

There is no guaranteed amount of weight loss from weight loss surgery. Weight control is your personal responsibility. As is true for other treatments for obesity, successful results depend significantly on knowledge, personal motivation, and behavior.

Potential side effects of weight loss surgery include, but are not limited to:

  • Nausea & vomiting
  • Gas & bloating
  • Lactose intolerance
  • Temporary hair thinning
  • Depression & psychological distress
  • Changes in bowel habits

Potential complications of weight loss surgery include, but are not limited to:

  • Infection, bleeding or leaking at stitches/staple lines
  • Blockage of intestines or stomach pouch
  • Dehydration
  • Blood clots in the legs or lungs
  • Vitamin and/or mineral deficiency
  • Protein malnutrition
  • Incisional hernia
  • Cannot reverse, or difficulty reversing
  • Revisional procedure(s) sometimes needed
  • Death

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