GASTRO-OESOPHAGEAL REFLUX DISEASE

✓ Medically ReviewedDISEASEID: MDBT0110🚨 TRIAGE: ROUTINEICD-10: K21

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Definition

CLINICAL DEFINITION

Gastro-oesophageal reflux disease is chronic reflux (backward flow) of gastric contents into the oesophagus (gullet). It causes troublesome symptoms or mucosal injury (lining damage). Typical features are heartburn (burning chest pain) and regurgitation (acid reaching mouth). Diagnosis blends symptoms, acid-suppression response, endoscopy (camera test) and reflux monitoring. Complications include erosive oesophagitis (ulcerated lining), Barrett change (intestinal lining switch) and stricture (narrowing).

IN PLAIN ENGLISH

Acid from the stomach flows back to the food pipe. The food pipe leads to the stomach. This burns the chest. Sour fluid may reach the mouth. It can cause cough or hoarse voice. Care lowers acid and aids healing.

COMMON MISCONCEPTION / WHAT IT DOES NOT MEAN

Gastro-oesophageal reflux disease is not brief occasional heartburn alone without trouble or injury. It is not functional dyspepsia (upper belly pain) without dominant reflux. It is not cardiac ischaemia (heart blood shortage) with exertional pressure. It is not eosinophilic oesophagitis (allergic gullet inflammation) without reflux proof. Diagnosis needs persistent trouble or proven injury.

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Word Breakdown

gastro-

=stomach

oesophag-

=gullet or food pipe

Literal Meaning: backward flow from stomach into gullet disease

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Abbreviations

GORD=Gastro-oesophageal reflux disease - UK spelling for chronic acid reflux

GERD=Gastroesophageal reflux disease - US spelling for same disorder

LOS=Lower oesophageal sphincter - valve at stomach entry

PPI=Proton pump inhibitor - acid-suppressing drug

H2RA=Histamine-2 receptor antagonist - acid-reducing drug

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Synonyms & Variants

Gastroesophageal Reflux Disease›Reflux oesophagitis›Acid reflux disease›

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Category-Specific Context

Gastro-oesophageal reflux disease is a Disease because it is chronic barrier failure with tissue injury and course. It is not a Symptom (felt complaint) such as heartburn alone. It has defined criteria with troublesome symptoms or proven injury. It causes strictures and Barrett change needing surveillance. Care targets lasting control with referral, not single-episode relief.

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Clinical Context & Usage

CLINICAL SETTINGS

Primary CareGastroenterology ClinicEndoscopy UnitGeneral Surgery ClinicRespiratory ClinicENT ClinicAntenatal Clinic

USAGE & DOCUMENTATION NOTES

Use GORD in UK spelling and GERD in US settings for the same disorder. Document typical heartburn with regurgitation plus atypical cough, hoarseness and dental change. Record weight, smoking, medicines and hernia (bulge) status. Code K21 plus oesophagitis or Barrett when present. Do not label all dyspepsia (upper pain) as reflux without proof.

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Primary Causes & Pathophysiology

PATHOPHYSIOLOGY

Lower oesophageal sphincter (valve at stomach entry) normally blocks reflux. Transient relaxations (brief valve openings) or low resting tone allow acid contact. Hiatus hernia (stomach bulge through diaphragm) displaces the valve and impairs clearance. Obesity raises belly pressure and promotes hernia. Peristalsis (wave squeezes) with saliva (alkaline mouth fluid) normally clears acid. Prolonged contact causes inflammation (redness), erosion (surface loss) and metaplasia (cell switch).

PRIMARY CAUSES

Transient sphincter relaxations with low resting tone

Brief valve openings with weak pressure let gastric acid reflux during normal activity

Hiatus hernia

Stomach bulge through diaphragm displaces sphincter and impairs acid clearance

Obesity with raised belly pressure

Excess weight raises stomach pressure and promotes hernia with valve failure

Pregnancy

Progesterone (pregnancy hormone) relaxes sphincter while uterus raises belly pressure

Smoking

Nicotine relaxes sphincter and cuts saliva that neutralises acid

Scleroderma with oesophageal dysmotility

Fibrosis (scar stiffening) weakens sphincter and halts peristalsis with poor clearance

Delayed gastric emptying

Slow emptying raises stomach volume and pressure with longer reflux episodes

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Drug-Induced Causes

💊 Calcium-channel blockers such as amlodipine and nifedipine ↗

Mechanism: Relax sphincter smooth muscle and lower valve pressure

→ Review indication, consider alternative pressure drug, add lifestyle with acid control if continued

💊 Nitrates such as glyceryl trinitrate ↗

Mechanism: Relax sphincter smooth muscle and promote reflux

→ Review cardiac indication, do not stop without cardiology input, manage reflux separately

💊 Anticholinergics such as oxybutynin and tricyclics ↗

Mechanism: Lower sphincter tone and slow gastric emptying

→ Review indication, consider alternative, monitor symptoms after change

💊 Oral bisphosphonates such as alendronate ↗

Mechanism: Direct gullet irritation with ulceration that worsens reflux injury

→ Take upright with full water and stay upright, stop and scope when ulcer or swallowing upset occurs

💊 NSAIDs such as ibuprofen and naproxen ↗

Mechanism: Impair mucosal defence and worsen gullet plus gastric injury

→ Use lowest dose or stop, test for ulcer, add acid suppression with stomach protection

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Epidemiology

Prevalence:Gastro-oesophageal reflux disease is common worldwide in primary care. Weekly symptoms affect many adults in Western practice. Rates are lower in East Asian surveys in many reports. Burden rises with obesity and ageing. Many cases are mild without erosions.

Age Group:All ages can be affected from infancy to older adulthood. Adult cases cluster in middle age and persist later. Pregnancy raises temporary reflux in reproductive years. Older adults show more erosive disease with Barrett change.

Geographic Distribution:Gastro-oesophageal reflux disease occurs worldwide in all regions and systems. Reported burden follows obesity, diet and testing access. Detection tracks endoscopy with reflux monitoring access. No climate restriction applies.

Red Flags & Triage ★

TRIAGE LEVEL

🚨 ROUTINE

DO NOT MISS — LIFE-THREATENING PRESENTATIONS

Cardiac ischaemia with exertional pressure, spread or sweating needing ECG with troponin
Alarm bleeding with vomiting blood or black stools needing urgent endoscopy
Progressive dysphagia with weight loss suggesting stricture or cancer
Food impaction with anaemia suggesting complicated disease
Severe wheeze with aspiration risk needing airway review

URGENT EVALUATION TRIGGERS

Severe chest pain with ECG change or instability
Vomiting blood or black stools
Progressive dysphagia or painful swallowing
Unexplained weight loss with reflux
Persistent vomiting or dehydration
Stridor or severe wheeze with aspiration
Iron deficiency anaemia with reflux

Contraindications & Precautions

CONTRAINDICATIONS

Do not use NSAIDs without protection in erosive oesophagitis
Do not take late large meals with lying flat soon after eating
Do not use oral bisphosphonates without strict upright dosing in active ulceration

SPECIAL PRECAUTIONS

Rule out cardiac chest pain before attributing pain to reflux
Check alarms with anaemia at each review
Review drug interactions with acid suppressants
Monitor bone, kidney and magnesium with long-term therapy
Arrange endoscopy with Barrett surveillance per guidance

Complications

DOWNSTREAM CLINICAL COMPLICATIONS

Erosive oesophagitis with lining breaks
Barrett oesophagus with intestinal change
Oesophageal stricture with narrowing
Oesophageal ulcer with bleeding
Iron deficiency anaemia from chronic loss
Chronic cough with asthma flare
Hoarseness with dental erosion
Oesophageal adenocarcinoma arising from Barrett

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Confused With (LASA & DDx) ★

LEXICAL (LASA) — SIMILAR NAMES

Gastroenteritis

Shares gastro prefix but means stomach-bowel infection with diarrhoea, not reflux

Eosinophilic oesophagitis

Shares gullet inflammation with swallowing upset but is allergic disease needing biopsy

Barrett oesophagus

Co-mentioned with reflux but is intestinal change from chronic reflux, not reflux itself

CLINICAL DIFFERENTIAL DIAGNOSES (DDx)

Functional dyspepsia

Key Distinguishing Feature: Epigastric pain or fullness without dominant heartburn or regurgitation

Cardiac ischaemia

Key Distinguishing Feature: Exertional pressure with spread and ECG or troponin changes

Eosinophilic oesophagitis

Key Distinguishing Feature: Young atopic patient with food impaction and allergy cells on biopsy

Achalasia

Key Distinguishing Feature: Progressive swallowing upset with bland regurgitation and failed relaxation on pressure test

Peptic ulcer disease

Key Distinguishing Feature: Localised epigastric pain with NSAID or Helicobacter link and ulcer on endoscopy

Biliary colic

Key Distinguishing Feature: Right upper pain after fatty meals with gallstones, not burning reflux

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Clinical Pearls

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Separate typical heartburn with regurgitation from atypical cough, hoarseness and dental change. Rule out cardiac ischaemia with ECG in chest pain. Ask alarms with anaemia at each visit.

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Start weight control with head elevation, late-meal avoidance and smoking review plus short acid-suppression trial when no alarm. Scope when alarm, anaemia, severe or persistent despite therapy.

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Grade erosions with Los Angeles A to D at endoscopy and record Prague C and M extent for Barrett segments. Refer dysplasia (precancer change) for expert surveillance and therapy.

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Plan maintenance with review and step-down when stable. Refer proven reflux with hernia for fundoplication (stomach wrap) or magnetic bead options in selected cases.

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Recheck medicines, weight and long-term acid-suppression effects at follow-up. Monitor bone, kidney and magnesium with ongoing therapy per guidance.

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Example Usage & SOAP

CLINICAL SENTENCE

""46-year-old woman with daily heartburn and sour rise at night has gastro-oesophageal reflux disease.""

IN A SOAP NOTE

S: 52-year-old man with 6-month heartburn and sour regurgitation, night cough and hoarseness, no weight loss or dysphagia. O: Temp 36.8C, BP 138/86, HR 78, RR 16, SpO2 98 percent on air, BMI 31.2, chest clear, abdomen soft. A: Gastro-oesophageal reflux disease with airway features, no alarm. P: Lifestyle with weight plan, short PPI trial with alginate, drug and smoking review, endoscopy when nonresponse or alarm, safety-net for chest pain and bleeding.

DIFFERENTIAL DIAGNOSIS CONTEXT

Burning rise when bending or at night favours reflux disease over epigastric fullness alone. Exertional pressure with ECG change favours cardiac ischaemia needing urgent workup. Food impaction in atopic youth favours allergic gullet disease with biopsy. Progressive dysphagia with weight loss favours stricture or achalasia. Check symptoms with medicines and alarm pattern.

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Classifications & Scoring

GRADING SYSTEM

Los Angeles Classification of Oesophagitis

Grades erosive oesophagitis from A with small breaks to D with extensive breaks to guide healing

STAGING SCALE

Prague C and M Criteria for Barrett Oesophagus

Measures circumferential and maximal Barrett extent in centimetres to standardise surveillance

SCORING TOOL

GerdQ Questionnaire

Six-item symptom score for reflux likelihood and treatment response in primary care

SCORING TOOL

GERD Health-Related Quality of Life Scale

Measures heartburn and regurgitation impact with surgical outcome

SCORING TOOL

Reflux Symptom Index

Scores throat clearing, hoarseness and cough for laryngopharyngeal reflux

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Prognosis

SHORT-TERM OUTCOME

Short term symptoms often improve with lifestyle and acid control. Typical cases respond within weeks with adherence. Erosive disease heals in most with adequate therapy. Alarm bleeding or severe swallowing upset needs urgent care.

LONG-TERM PROGNOSIS

Long term course often relapses without maintenance and weight control. Sustained therapy with lifestyle cuts relapse. Barrett without dysplasia (precancer change) carries low annual cancer progression. Stricture with severe oesophagitis predicts surveillance or surgery need.

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References & Coding

ICD-10 DIAGNOSTIC CODE

K21

LITERATURE CITATIONS & GUIDELINES

[1]WHO ICD-10 K21 Gastro-oesophageal reflux disease

[2]NICE dyspepsia and gastro-oesophageal reflux guidance

[3]American College of Gastroenterology reflux diagnosis and management guidance

[4]Harrison's Principles of Internal Medicine oesophageal disorders

MEDICAL DISCLAIMER — This content is intended for educational purposes and qualified healthcare professionals only. Always refer to current clinical diagnostic criteria, institutional protocols, and official guidelines. Medobo is not responsible for clinical decisions made based on this content.

GASTRO-OESOPHAGEAL REFLUX DISEASE

Definition

Word Breakdown

Abbreviations

Synonyms & Variants

Category-Specific Context

Clinical Context & Usage

Primary Causes & Pathophysiology

Drug-Induced Causes

Epidemiology

Red Flags & Triage ★

DO NOT MISS — LIFE-THREATENING PRESENTATIONS

URGENT EVALUATION TRIGGERS

Contraindications & Precautions

CONTRAINDICATIONS

SPECIAL PRECAUTIONS

Complications

DOWNSTREAM CLINICAL COMPLICATIONS

Confused With (LASA & DDx) ★

Clinical Pearls

Example Usage & SOAP

Classifications & Scoring

Los Angeles Classification of Oesophagitis

Prague C and M Criteria for Barrett Oesophagus

GerdQ Questionnaire

GERD Health-Related Quality of Life Scale

Reflux Symptom Index

Prognosis

SHORT-TERM OUTCOME

LONG-TERM PROGNOSIS

Related Terms

References & Coding