Breakthrough Findings from Abu Dhabi's Leading Tertiary Center

Recent research from Sheikh Shakhbout Medical City (SSMC) in Abu Dhabi has uncovered a significant association between dysphagia and major esophageal motility disorders (MEMDs), marking the first such study in the United Arab Emirates (UAE). Dysphagia, defined as difficulty swallowing (from the Greek 'dys' meaning difficult and 'phagia' meaning eating), affects patients' quality of life profoundly, often leading to weight loss, malnutrition, and aspiration risks. This retrospective cohort analysis of 104 patients undergoing high-resolution esophageal manometry (HREM) revealed that 61.5% presented with dysphagia, and 35.6% had underlying MEMDs, with dysphagia significantly increasing the likelihood of detecting these disorders.

Conducted between July 2020 and February 2023, the study highlights the pivotal role of advanced diagnostics in UAE healthcare, positioning SSMC as a hub for gastrointestinal motility research. Led by experts like Dr. Eyad Alakrad, who holds an adjunct position at Khalifa University, this work bridges clinical practice and academic excellence, contributing to UAE's growing medical research ecosystem.

Defining Dysphagia and Esophageal Motility Disorders

Dysphagia manifests as a sensation of food sticking in the throat or chest, or painful swallowing, categorized into oropharyngeal (upper esophagus involvement) or esophageal (lower esophagus). Esophageal motility disorders involve impaired muscle contractions or sphincter function in the esophagus, the muscular tube transporting food from mouth to stomach via peristalsis waves. Major disorders per Chicago Classification version 3.0 include achalasia (failure of lower esophageal sphincter relaxation), ineffective esophageal motility (IEM, weak peristalsis), esophagogastric junction outflow obstruction (EGJOO), aperistalsis (absent peristalsis), distal esophageal spasm (DES), and jackhammer esophagus (hypercontractile).

In the UAE context, where diverse diets rich in spices and expatriate populations influence GI health, these conditions pose unique challenges. Global prevalence of achalasia is 1-1.6 per 100,000, but regional data is sparse; this SSMC study fills a critical gap, showing IEM as most common (37.8% of MEMDs), followed by achalasia (27%).

Study Design and Methodology at SSMC

Researchers reviewed electronic health records of all HREM patients at SSMC, excluding those with structural abnormalities on endoscopy or imaging. HREM, the gold standard using a catheter with 36 sensors to measure pressures, followed Chicago v3.0 protocols: 10 supine water swallows analyzed for integrated relaxation pressure (IRP), distal contractile integral (DCI), etc. Demographics (age, gender, BMI, nationality, comorbidities like diabetes, GERD, opioid use) were compared between dysphagia and non-dysphagia groups, and within dysphagia patients with/without MEMDs using chi-squared tests.

SSMC's state-of-the-art GI Motility Service, launched in 2024, enabled precise diagnostics, underscoring UAE's investment in specialized care. This rigorous approach ensures reliable metrics, vital for regional benchmarks.

Key Statistics and Prevalence Insights

• 61.5% (64/104) patients had dysphagia.
• 35.6% (37/104) total MEMDs; 57.8% in dysphagia group vs 32.5% without (p=0.021).
• MEMD breakdown: IEM 37.8%, achalasia 27%, EGJOO 24.3%, aperistalsis 8.1%, DES 2.7%.
• Mean age 43 years, BMI 27.9 kg/m², 53.8% UAE nationals.

These figures exceed some global IEM rates (20-30%), possibly due to referral bias or UAE-specific factors like diet or genetics.

Demographic Factors: Gender, Nationality, and Risk Profiles

Among dysphagia patients with MEMDs, males predominated (59.5% vs 25.9%, p=0.011), contrasting some Western data favoring females. UAE nationals were overrepresented (59.5% vs 7.4%, p=0.004), suggesting genetic, dietary (e.g., high-fat traditional foods), or healthcare access differences. No links to BMI, diabetes, opioids, or GERD, though small sample limits power. This informs targeted screening in Emirati males.

SSMC's diverse patient base (78 UAE nationals in cohort) mirrors Abu Dhabi's demographics, enhancing generalizability.

Photo by Markus Winkler on Unsplash

Regional Comparisons and Global Context

In Saudi Arabia, similar HREM studies show achalasia ~52%, IEM variable. Iranian data: 84.5% any motility disorder, achalasia common. UAE's IEM lead aligns with Asia patterns, differing from Western EGJOO dominance. Dysphagia prevalence post-stroke ~70% regionally, but non-obstructive data scarce, making SSMC's 61.5% pivotal.

Clinical Implications for Diagnosis and Management

Dysphagia warrants prompt HREM in UAE, prioritizing non-obstructive cases. Early MEMD detection prevents complications like aspiration pneumonia. Treatments: Achalasia (pneumatic dilation, Heller myotomy, POEM); IEM (prokinetics like domperidone, lifestyle). SSMC's multidisciplinary approach integrates endoscopy, manometry, pH-impedance for holistic care.

For patients, actionable: Chew thoroughly, upright eating, thicken liquids if needed. Physicians: Refer dysphagia-dominant NCCP to motility centers.

Advanced Tools: HREM and Chicago Classification in UAE

HREM visualizes 3D pressure topography, diagnosing via metrics: Elevated IRP (>15 mmHg) signals outflow obstruction. Chicago v3.0 standardizes: 100% absent contractility = aperistalsis; DCI <450 mmHg·s·cm in ≥50% swallows = IEM. SSMC employs Zvu software, aligning with global best practices. Prior SSMC study (2025) on NCCP found IEM 30%, reinforcing utility.

Spotlight on Researchers and University Ties

Lead authors from SSMC's Gastroenterology team, with Dr. Eyad Alakrad bridging clinic and academia as Khalifa University adjunct professor. Khalifa University's collaborations with SSMC span AI research labs, clinical trials, medtech. This study exemplifies UAE's academic-hospital synergy, training future gastroenterologists. Explore UAE higher ed opportunities or higher ed jobs in medical research.

UAE's Rising Medical Research Landscape

UAE invests heavily in health R&D; SSMC's congresses, AI labs with Khalifa/MBZUAI advance GI field. Dysphagia data gaps closing, aiding national strategies like DoH's GI screening. Implications for training: More HREM fellows needed.

Photo by Ian Valerio on Unsplash

Future Outlook: Research and Training Needs

Prospective studies, larger cohorts, genetic analyses urged. UAE universities like Khalifa can lead HREM training, POEM simulations. Patient registries, AI-enhanced manometry on horizon via SSMC-Khalifa ties. Positive outlook: Early diagnosis improves outcomes 80-90%.

• Expand HREM access regionally.
• Multicenter UAE MEMD registry.
• Integrate into med school curricula.

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Conclusion: Advancing Swallowing Health in UAE

This landmark UAE Dysphagia Study underscores MEMDs' role in non-obstructive cases, guiding clinicians at SSMC and beyond. With Khalifa University input, it boosts UAE's research stature. Patients: Seek HREM for persistent dysphagia. Academics: UAE higher ed offers vibrant GI research paths. Stay informed via Rate My Professor, pursue higher ed jobs, or career advice.