logo

Call Us

+65 9838 5827
CONTACT US

Gastroscopy

Dr Thng Yongxian

Gastroscopy Doctor
MBBS • MMed • MRCS (IRE) • FRCSED • FAMS

BOOK AN APPOINTMENT

What is a Gastroscopy?

A gastroscopy, also known as an upper endoscopy, is a diagnostic procedure that views the upper part of the gastrointestinal tract, including the oesophagus, stomach and duodenum. This procedure uses a thin, flexible tube equipped with a light and camera, called a gastroscope, inserted through the mouth and down the throat.

 

A gastroscopy is used to diagnose conditions such as stomach ulcers, gastritis and celiac disease, and to identify causes of abdominal pain, persistent nausea or dysphagia (difficulty swallowing). It can also be used to treat certain conditions, such as bleeding ulcers, or for removing swallowed objects.

Why Would You Need a Gastroscopy?

A gastroscopy in Singapore is a clinical procedure used to examine the upper gastrointestinal (GI) tract, which includes the oesophagus, stomach, and the first part of the small intestine (duodenum). A gastroscopy doctor may recommend this procedure to investigate persistent symptoms, screen for specific conditions, or provide immediate treatment for digestive issues.

 

Common reasons for undergoing this procedure at a gastroscopy clinic include:

  • Direct Visualisation of the Upper GI Tract: This allows the gastroscopy specialist to visually inspect the oesophagus, stomach and duodenum for abnormalities.

  • Ability to Perform Biopsies: Tissue samples can be collected during the procedure for microscopic examination, aiding in accurate diagnosis by the gastroscopy clinic.

  • Detection of Early Stage Cancers: Direct visualisation and biopsy capabilities significantly enhance the early detection of malignancies in the upper GI tract, allowing for timely gastroscopy treatment.

  • Identifying Causes of Bleeding: A gastroscopy is a primary method for locating and identifying the source of bleeding within the upper gastrointestinal tract.

  • Evaluating Swallowing Difficulties: Patients experiencing dysphagia (difficulty swallowing) or a sensation of food being stuck may require a gastroscopy to check for inflammation or obstructions.

  • Pre- and Post-Surgical Evaluation: It is often used to evaluate the condition of the oesophagus or stomach before and after major gastrointestinal surgery.

  • Monitoring Existing Conditions: Patients with known issues such as gastritis, gastric ulcers, or Barrett’s oesophagus may require regular gastroscopy services in Singapore to monitor their condition and response to treatment.

Beyond diagnosis, gastroscopy clinics in Singapore also provide therapeutic capabilities that allow for immediate gastroscopy treatment and services during the procedure, such as:

  • Removal of Polyps: Benign growths (polyps) can be safely identified and removed during the session to prevent potential future complications.

  • Treatment of Bleeding Sites: Active bleeding from ulcers or other lesions can be managed and stopped using specialised endoscopic techniques.

  • Dilation of Narrowed Areas: Strictures or narrowed sections of the oesophagus can be stretched (dilated) to improve swallowing function and comfort.

Indications for a Gastroscopy

A gastroscopy in Singapore is often recommended when patients experience persistent upper gastrointestinal symptoms that require further investigation. These include:

  • Persistent Upper Abdominal Pain

  • Chronic Heartburn or Acid Reflux

  • Difficulty Swallowing (Dysphagia)

  • Unexplained Weight Loss

  • Vomiting or Nausea

  • Gastrointestinal Bleeding

Beyond a symptoms assessment, a gastroscopy is also crucial for monitoring and diagnosing various upper digestive tract conditions, such as:

  • Gastritis: Inflammation of the stomach lining.

  • Barrett’s Oesophagus: Changes in the cells lining the lower oesophagus, often due to chronic acid reflux.

  • Coeliac Disease: An autoimmune condition where gluten consumption damages the small intestine.

  • Stomach Cancer: Malignant growths originating in the stomach lining.

Enquire For a Gastroscopy

Considering a gastroscopy in Singapore? Consult our gastroscopy specialist for an accurate diagnosis and personalised care.

Make a Booking Now

Preparing for a Gastroscopy

To ensure a successful gastroscopy, follow these preparation steps:

Fasting

  • Avoid eating or drinking for at least 6 to 8 hours before the procedure to clear the stomach.

Medication Adjustments

  • Discuss all medications with your gastroscopy doctor, as some may need to be paused or adjusted for the procedure.

Pre-Procedure Instructions

  • Following all the pre-gastroscopy guidelines carefully to ensure accurate results and optimal comfort.

Types of Gastroscopy

A gastroscopy in Singapore is typically performed using one of two primary methods, depending on the patient’s clinical needs and comfort. Your gastroscopy doctor will select the most appropriate approach to ensure a thorough examination of the upper gastrointestinal tract while maintaining patient safety.

Traditional Gastroscopy

  • Traditional gastroscopy is where a gastroscopy doctor inserts a flexible endoscope through the mouth and guides it down the oesophagus. To ensure a comfortable experience, this procedure is usually performed under conscious sedation, which helps the patient relax or sleep during the process.

Transnasal Gastroscopy

  • Transnasal gastroscopy is an alternative diagnostic approach where an ultra-slim endoscope is inserted through the nostril instead of the mouth. Because the tube bypasses the back of the tongue, the gag reflex is greatly reduced, often allowing the procedure to be performed with only a local anaesthetic spray rather than full sedation.

The Gastroscopy Procedure

A gastroscopy is a precise, structured procedure that examines the upper gastrointestinal tract. The following describes a typical gastroscopy procedure, which typically takes 10 to 20 minutes to complete:

Arrival and Preparation

Upon arrival at the gastroscopy clinic or hospital, patients complete any final paperwork required and are prepared for the procedure, which includes changing into a hospital gown.

Sedation

Sedation is administered to help the patient relax. Some patients might receive a local anaesthetic sprayed into the throat to numb the area. During the procedure, the patient’s vital signs, including blood pressure, heart rate, and oxygen levels, will be monitored continuously to ensure safety and comfort.

Insertion of the Gastroscope

The gastroscope (or endoscope) is gently inserted through the mouth and advances down the oesophagus into the stomach and duodenum. The camera at the tip of the gastroscope transmits video to a monitor, allowing examination of the oesophagus, stomach and duodenum. 

 

As the gastroscope is advanced, air may be introduced into the stomach to improve visibility. This can cause temporary bloating and a sensation of needing to belch, but the patient should not experience pain.

Examination and Intervention

The mucosal lining is inspected, and interventions are performed if needed, such as removing polyps or treating bleeding sources. During the procedure, if any abnormalities are found, your doctor may perform a biopsy (take a small tissue sample) or carry out treatments, such as removing polyps or treating any bleeding ulcers. This is performed using tiny instruments passing through the gastroscope.

Withdrawal of the Gastroscope

Once the examination and any necessary treatments are complete, the gastroscope is carefully withdrawn. This part of the procedure usually causes no discomfort. The entire procedure typically lasts between 10 to 20 minutes, depending on the specific circumstances and any additional interventions required.

Associated Complications with Gastroscopy

While a gastroscopy in Singapore is considered a safe and routine clinical procedure, like any medical intervention, it carries a small risk of potential complications. A gastroscopy doctor will discuss these risks with you beforehand to ensure you are fully informed before proceeding at a gastroscopy clinic.

 

Some potential cases of complications are:

  • Reaction to Sedation: Some patients may experience a temporary reaction to the sedative medication used during the procedure. 

  • Minor Bleeding: Following a biopsy or the removal of a polyp (polypectomy), slight bleeding may occur at the site. This is typically minimal and rarely requires further intervention or blood transfusions.

  • Perforation: In very rare instances, a small tear or hole may occur in the lining of the oesophagus, stomach, or duodenum. If this occurs, it may require surgical repair or specific medical management.

  • Infection: As with any procedure involving the digestive tract, there is a remote risk of infection, though strict sterilisation protocols are designed to minimise this.

  • Site Irritation: Occasionally, the vein used for sedative administration may become irritated, resulting in a small, tender lump. This usually resolves on its own within a few weeks and can be managed with warm compresses.

It is important to recognise early signs of potential issues following your gastroscopy services in Singapore. You should contact your gastroscopy clinic immediately if you experience any of the following symptoms post-procedure:

  • Severe or worsening abdominal or chest pain

  • Difficulty swallowing or significant throat pain

  • Fever or chills

  • Persistent nausea or vomiting

  • Black or tarry stools, or rectal bleeding

While these risks exist, the diagnostic benefits of an upper endoscopy generally outweigh the potential for complications. Your healthcare provider will take all necessary precautions to ensure the procedure is performed safely and effectively.

Alternatives to Gastroscopy

While a gastroscopy in Singapore is often the preferred method for direct visualisation and treatment of the upper digestive tract, a gastroscopy doctor may employ other alternatives depending on your specific symptoms and medical history.

  • Water-Soluble Contrast Study: In this imaging test, a patient swallows a liquid contrast agent that coats the internal lining of the oesophagus, stomach, and small intestine. A series of X-ray images are then taken to evaluate the structural anatomy and how these organs are functioning.

  • CT or MRI Scans: These advanced imaging techniques use X-rays or magnetic fields to create detailed cross-sectional images of the internal organs. They are particularly useful for a gastroscopy clinic to identify larger abnormalities, such as tumours or significant inflammation, that may exist outside the reach of an endoscope.

  • Capsule Endoscopy: This involves swallowing a small, pill-sized camera that captures thousands of images as it travels through the digestive tract. While it is highly effective for viewing the small bowel, it provides less control for a gastroscopy doctor to pause and inspect specific areas of the stomach or oesophagus compared to a traditional scope.

  • Barium Swallow: This alternative focuses specifically on the upper GI tract to detect structural issues like hiatal hernias or narrowing (strictures) that might cause difficulty swallowing.

It is important to note that these alternative procedures are often considered complementary rather than direct replacements for gastroscopy services in Singapore. Unlike a physical endoscope, these alternatives do not allow for the immediate removal of polyps or the collection of tissue samples (biopsies).

 

Your gastroscopy doctor will evaluate your clinical needs to determine if these alternatives are appropriate or if a direct gastroscopy remains the most effective course of action for an accurate diagnosis.

Recovery and Aftercare

After a gastroscopy, paying attention to the recovery and aftercare instructions ensures a smooth transition back to normal activities. Here’s what patients can typically expect:

  • Post-procedure Monitoring:


    Immediately following the procedure, patients are monitored in a recovery area until the effects of the sedation wear off. This usually takes about an hour.

  • Diet and Hydration:


    Patients are often encouraged to start with sips of water and gradually progress to more solid foods as they feel comfortable. It’s important to avoid alcohol for at least 24 hours after receiving sedation.

  • Throat Discomfort:


    Some throat soreness or discomfort is common after a gastroscopy due to the insertion of the gastroscope. Lozenges and warm drinks can help soothe the throat.

  • Activity Level:


    Patients should plan to rest for the remainder of the day following the procedure. Normal activities can typically be resumed the next day unless advised otherwise.

  • Observing Symptoms


    Watch for signs of complications such as severe abdominal pain, fever, difficult or painful swallowing or bleeding (including vomiting blood or blood in the stool). These symptoms require immediate medical attention.

How Much Does Gastroscopy Cost in Singapore

The cost of gastroscopy services at a private clinic in Singapore ranges from S$1,853 – S$2,943 w/GST according to the MOH Recommend Fee Benchmarks (SF700E). This figure refers to the surgeon fee and the total amount can fluctuate depending on your insurance plan, deductibles, medisave payouts and length of hospital stay.

Dr Thng Yongxian

Senior Consultant

Gastroscopy Doctor

MBBS (SG) • MMed (Surg) • MRCS (Ire) • FRCSEd (Gen) • FAMS (Surg)

Dr Thng Yongxian offers comprehensive Gastroscopy (upper endoscopy) for both diagnostic evaluation and therapeutic gastroscopy with the assurance of personalised, evidence-based care.
  • Bachelor of Medicine & Bachelor of Surgery
  • National University of Singapore
  • Membership of the Royal College of Surgeons, Ireland
  • Master of Medicine, General Surgery, Singapore
  • Fellow of the Royal College of Surgeons, Edinburgh
  • Fellow of the Academy of Medicine, Singapore

Dr Thng Yongxian is a hepatopancreatobiliary surgeon skilled in performing gastroscopy (upper endoscopy) to investigate complex symptoms, detect gastrointestinal cancers early, and provide timely, specialised treatment.

 

Dr Thng specialises in advanced gastroscopy procedures such as image-enhanced gastroscopy using NBI and chromoendoscopy to improve lesion detection, as well as gastroscopy for the diagnostic evaluation of dyspepsia, reflux, anemia, and upper GI bleeding. He also performs therapeutic gastroscopy with ulcer hemostasis, Dieulafoy control, and variceal band ligation, alongside emergency services like foreign body removal via gastroscopy (food bolus extraction) or gastroscopy biopsies for H. pylori testing with same-visit eradication.

 

Dr. Thng maintains the highest standards of personalised, evidence-based care for optimal patient well-being. His endoscopy performance is continuously evaluated, with Gastroscopy quality tracked across vital metrics such as: detection proxy, complete photo documentation set, and complication rate proxy.

 

Dr Thng pursued his subspecialty training in Hepatopancreatobiliary surgery at Singapore General Hospital followed by a fellowship in Minimally Invasive Hepatopancreatobiliary Surgery at Seoul National University Hospital. He is an established surgeon who has served as a member of the Ministry of Health (MOH) Laparoscopic cholecystectomy clinician workgroup for value-driven care (VDC).

Education
  • Bachelor of Medicine & Bachelor of Surgery
  • National University of Singapore
  • Membership of the Royal College of Surgeons, Ireland
  • Master of Medicine, General Surgery, Singapore
  • Fellow of the Royal College of Surgeons, Edinburgh
  • Fellow of the Academy of Medicine, Singapore

Frequently Asked Questions About a Gastroscopy

Is a gastroscopy painful?

A gastroscopy is generally not painful as it is performed under sedation, ensuring your comfort throughout. You might experience a mild sore throat afterwards, but severe pain is uncommon.

You can typically resume eating and drinking once the effects of sedation wear off, usually within an hour or two. It’s often recommended to start with light, easily digestible foods.
While a gastroscopy offers direct visualisation and biopsy capabilities, alternatives for investigating upper GI symptoms may include barium swallow X-rays or a capsule endoscopy. However, these generally do not offer the same diagnostic precision or therapeutic capabilities as a full gastroscopy.

Corporate and Personal Insurance Plans

Our Clinic Location

Precision Surgical Centre
@ Gleneagles Hospital Annexe Block

Precision Surgical Centre @ Gleneagles Hospital Annexe Block

Clinic Locations

Nexus Surgical @ Mt. Alvernia

Nexus Surgical @ Mt. Elizabeth Orchard

Nexus Surgical @ Mt. Elizabeth Novena

Nexus Surgical @ Parkway East

Nexus Surgical @ Gleneagles Medical Centre

Nexus Surgical @ Mt. Alvernia

Nexus Surgical @ Mt. Elizabeth Orchard

Nexus Surgical @ Mt. Elizabeth Novena

Nexus Surgical @ Parkway East

Nexus Surgical @ Gleneagles Medical Centre

Nexus Surgical @ Mt. Alvernia

Nexus Surgical @ Mt. Elizabeth Orchard

Nexus Surgical @ Mt. Elizabeth Novena

Nexus Surgical @ Parkway East

Nexus Surgical @ Gleneagles Medical Centre

Need Help Navigating Your Health?

Dr. Thng Yongxian is experienced in a wide range of surgical specialties, including being a jaundice surgeon and gallbladder specialist. If you wish to learn more about our gastroscopy services or our other specialised treatments in Singapore, please contact our clinic today.