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What is Bariatric Surgery? A Complete Guide to Weight Loss Surgery

IRIS
June 20, 2025
10 mins read

Obesity is more than excess weight—it can affect your health, energy, and self-confidence. For others, losing weight through diet and exercise is almost impossible. That's where bariatric surgery, also known as weight loss surgery, comes in.

At Iris Hospital, Kolkata, we offer world-class and affordable bariatric surgery options designed to help you lose weight safely and improve your well-being.

What is Bariatric Surgery?

Bariatric surgery is a treatment that involves medical operations that help you lose weight by either reducing the size of your stomach or altering how your body digests food. The goal is to help you eat less food, feel full sooner, and consume fewer calories.

If you have a Body Mass Index (BMI) of 35 or more and have obesity-related complications like high blood pressure or diabetes, bariatric surgery may be suitable for you.

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Types of Bariatric Surgery

At Iris Hospital, our team of experienced surgeons offers various types of bariatric surgery in Kolkata depending on your health condition and weight loss goals:

1. Gastric Bypass Surgery

It entails making a small pouch in your stomach and attaching it directly to the small bowel. It limits the quantity of food you can consume and the number of calories you can absorb.

2. Sleeve Gastrectomy (Gastric Sleeve)

Approximately 80% of the stomach is taken out, and a smaller "sleeve"-like stomach is left behind. You get hungry sooner and consume less.

3. Adjustable Gastric Band (Lap-Band)

A silicone band is put around the upper part of the stomach to form a small pouch. This procedure is less invasive and adjustable over time.

4. Biliopancreatic Diversion with Duodenal Switch (BPD/DS)

A more involved surgery that combines stomach volume reduction along with rerouting of intestines. For patients with extremely high BMI and serious health issues.

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Pre- and Post-Bariatric Surgery at Iris Hospital

Pre-Operative:

  • Health screening and laboratory tests
  • Dietary counseling
  • Pre-operative diet advice
  • Psychological counseling, if required

Post-Operative:

  • Recovery depends on type of surgery (typically 2–4 weeks)
  • Start liquid diets and gradually soft foods
  • Early and marked weight loss
  • Permanent improvements in diseases like diabetes and hypertension

We stand by you every step of the way—with an integrated care team, including surgeons, nutritionists, and physical therapists.

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What are the Benefits of Bariatric Surgery?

Bariatric surgery patients usually have:

  • Long-term weight loss
  • Improved glucose
  • Lower blood pressure and cholesterol
  • Relief from joint pain and sleep apnea
  • Increased mobility and energy
  • Better self-esteem and confidence

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Are there any Risks and Side Effects?

There is always some risk involved with every surgery, and bariatric surgery is no exception. But at Iris Hospital, we use state-of-the-art laparoscopic (keyhole) technology to keep complications to a minimum and recovery to a speedy result.

Possible Risks Are:

  • Infection
  • Bleeding
  • Deficiencies of nutrients
  • Dumping syndrome (feeling ill after eating sweets)
  • Gallstones or skin left over after major weight loss

These hazards can be controlled with proper follow-up and diet control.

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Bariatric Surgery Cost in Kolkata – At Iris Hospital

The cost of bariatric surgery in Kolkata is much lower than in most other places on the earth. At Iris Hospital, our emphasis lies on quality services at reasonable rates.

Approximate Cost Range: ₹2,50,000 to ₹4,50,000
(This includes surgery, stay in the hospital, tests, and post-op care)

We also help the patients in managing insurance benefits, EMI schemes, and financial planning for the surgery. 

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Life After Bariatric Surgery – Lifestyle Habits are Important

Surgery is not enough. You will need to adopt good habits after the surgery to make sure your outcomes are long-lasting.

We help you with at Iris Hospital:

  • Personalized diet plan
  • Effective and safe exercise routines
  • Routine health check-ups and follow-up
  • Nutritional supplements to avoid deficiencies
  • Ongoing support from our bariatric team

Our goal is to help you live a healthy, active, and fulfilling life—and not just to lose weight.

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Is Bariatric Surgery Right for You?

You may be a good candidate for bariatric surgery if:

  • You have a BMI over 35
  • You have medical problems related to obesity
  • You have tried diets and exercise without achieving lasting results
  • You are willing to make lasting changes in your lifestyle

Our professionals will evaluate your health, goals, and readiness to determine the best approach for you.

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Why Choose Iris Hospital for Bariatric Surgery in Kolkata?

  • Qualified and experienced bariatric surgeons
  • Latest laparoscopic and robotic equipment
  • Full-time counselors, physiotherapists, and nutritionists
  • Clean, safe, and patient-friendly environment
  • Clear billing and reasonable packages
  • High success rate and high patient satisfaction

We believe in helping you lose weight the right way—thoughtfully, empathetically, and with complete medical support.
 

Bariatric Surgery Before and After: True Transformations

Many of our patients have not only shed weight, but have also re-gained command of their lives. With better health, more energy, and renewed confidence, they've transformed physically and emotionally as well.

Our care model with a before-and-after approach ensures that you never feel isolated in your journey—our team is with you from day one.

Conclusion

If you are struggling with obesity and its related issues, don't go on silently. Bariatric surgery at Iris Hospital, Kolkata, can be your prayers answered. With exceptional care, personalized treatment, and affordable prices, your journey of losing weight is in safe hands.

Book your appointment now.

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