Someone once told Christina Tennyson, MD, that clinical medicine was a grind. Instead of veering away from the profession, she dove in. Medicine will always have its frustrations, she acknowledged.
However, “finding areas that interest me and incorporating those into clinical practice has really helped me enjoy the practice of medicine,” said Dr. Tennyson, who works at Augusta Health in Fishersville, Va.
It has also inspired her to think outside the box in her gastroenterology practice. What her patients eat and the lifestyle choices they make is a central focus of her work.
Q: Why did you choose GI?
Dr. Tennyson: I always had an interest in nutrition. During training at medical school at NYU [New York University], I also really loved learning all I could about internal medicine. I worked with a great surgical team as a student and enjoyed being in the operating room. Although I knew I didn’t want to enter surgery, the experience encouraged me to pursue gastroenterology as it involved nutrition, internal medicine, and procedures as well as my favorite organ, the small bowel. I worked with some great mentors in gastroenterology, such as Dr. David Metz and Dr. Dave Katzka, at the University of Pennsylvania as a resident. I enjoyed taking care of patients with both acute and chronic conditions as well as the mix of doing procedures and seeing patients in the office. It also provided me the opportunity to incorporate nutrition into my clinical practice.
Q: What gives you the most joy in your day-to-day practice?
Dr. Tennyson: I enjoy helping my patients make meaningful lifestyle changes that can positively impact digestive health and well-being. I try to address topics related to lifestyle medicine in most of my clinical visits including eating more fiber/plants, exercise, positive relationships, and stress management. Many of the conditions we treat as gastroenterologists can benefit from addressing aspects of lifestyle along with our conventional medical therapies. I reinforce that attention to these areas can make a difference. I enjoy sharing recipes, books, and websites that I have found helpful.
Q: How has your job changed since you first began your career?
Dr. Tennyson: After fellowship, I joined the faculty at Columbia University and worked at the Celiac Disease Center seeing patients, teaching, and performing clinical research under the mentorship of Peter Green, MD, and Suzanne Lewis, MD. It was a great opportunity to learn and practice in a tertiary center. I later switched roles and joined a general multispecialty community practice in Brooklyn [N.Y.] affiliated with an academic medical center. After practicing in New York for 10 years, I left my clinical practice and performed locums work for several years in underserved rural areas. I enjoyed working in rural areas and took a permanent position at a community hospital in Virginia’s Shenandoah Valley.
Q: Describe your biggest practice-related challenge and what you are doing to address it.
Dr. Tennyson: The small, rural community hospital where I currently work does not have the same resources and staffing as urban tertiary centers. While we are taking care of the community in our general gastroenterology practice, we’ve also launched an integrated care model in our hospital. We have collaborated with behavioral health, dietitians, nurses, health coaches, exercise physiologists as well as other members of the community, including farmers and a chef. We have performed some innovative, engaging programs, including fermentation workshops, cooking classes, farm walks, and mindfulness programs.
Q: What are you most proud of accomplishing?
Dr. Tennyson: I am proud that I took a nontraditional path after training to do what I enjoy and find rewarding. I received certification during GI fellowship at Mount Sinai [N.Y.] as a physician nutrition specialist. I later completed a fellowship in integrative medicine at the University of Arizona, received certification in lifestyle medicine, and completed coursework in culinary medicine. I really enjoyed doing locums work taking care of patients in other parts of the country, like Mississippi or Maine. I’ve enjoyed working in more rural areas and bringing some innovative programs to the community.
Q: What teacher or mentor had the greatest impact on you?
Dr. Tennyson: Dr. Anthony Grieco while I was a student at NYU. He is an astute clinician, always listened to his patients, loved clinical medicine, and had an endless fund of knowledge. I wanted to be a doctor like him. During my fellowship at Mount Sinai, I was also exposed to many great mentors including Dr. Lloyd Mayer, Dr. Jerome Waye, Dr. Steve Itzkowitz, and Dr. Blair Lewis who encouraged my interest in nutrition and small bowel diseases.
Lightning round
What's your superpower?
Finding fun in mundane things
Favorite movie to quote?
The Princess Bride
What is your favorite form of exercise?
A hike in the woods
Name one thing on your bucket list.
Galapagos Islands trip before my kids grow up
Cats or dogs?
Dogs
Summer or winter?
Summer
Summary content
7 Key Takeaways
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Developed a paper-based colorimetric sensor array for chemical threat detection.
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Can detect 12 chemical agents, including industrial toxins.
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Production cost is under 20 cents per chip.
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Utilizes dye-loaded silica particles on self-adhesive paper.
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Provides rapid, simultaneous identification through image analysis.
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Inspired by the mammalian olfactory system for pattern recognition.
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Future developments include a machine learning-enabled reader device.
The guidelines emphasize four-hour gastric emptying studies over two-hour testing. How do you see this affecting diagnostic workflows in practice?
Dr. Staller: Moving to a four-hour solid-meal scintigraphy will actually simplify decision-making. The two-hour reads miss a meaningful proportion of delayed emptying; standardizing on four hours reduces false negatives and the “maybe gastroparesis” purgatory that leads to repeat testing. Practically, it means closer coordination with nuclear medicine (longer slots, consistent standardized meal), updating order sets to default to a four-hour protocol, and educating front-line teams so patients arrive appropriately prepped. The payoff is fewer equivocal studies and more confident treatment plans.
Metoclopramide and erythromycin are the only agents conditionally recommended for initial therapy. How does this align with what is being currently prescribed?
Dr. Staller: This largely mirrors real-world practice. Metoclopramide remains the only FDA-approved prokinetic for gastroparesis, and short “pulsed” erythromycin courses are familiar to many of us—recognizing tachyphylaxis limits durability. Our recommendation is “conditional” because the underlying evidence is modest and patient responses are heterogeneous, but it formalizes what many clinicians already do: start with metoclopramide (lowest effective dose, limited duration, counsel on neurologic adverse effects) and reserve erythromycin for targeted use (exacerbations, bridging).
Several agents, including domperidone and prucalopride, received recommendations against first-line use. How will that influence discussions with patients who ask about these therapies?
Dr. Staller: Two points I share with patients: evidence and access/safety. For domperidone, the data quality is mixed, and US access is through an FDA IND mechanism; you’re committing patients to EKG monitoring and a non-trivial administrative lift. For prucalopride, the gastroparesis-specific evidence isn’t strong enough yet to justify first-line use. So, our stance is not “never,” it’s just “not first.” If someone fails or cannot tolerate initial therapy, we can revisit these options through shared decision-making, setting expectations about benefit, monitoring, and off-label use. The guideline language helps clinicians have a transparent, evidence-based conversation at the first visit.
The guidelines suggest reserving procedures like G-POEM and gastric electrical stimulation for refractory cases. In your practice, how do you decide when a patient is “refractory” to medical therapy?
Dr. Staller: I define “refractory” with three anchors.
1. Adequate trials of foundational care: dietary optimization and glycemic control; an antiemetic; and at least one prokinetic at appropriate dose/duration (with intolerance documented if stopped early).
2. Persistent, function-limiting symptoms: ongoing nausea/vomiting, weight loss, dehydration, ER visits/hospitalizations, or malnutrition despite the above—ideally tracked with a validated instrument (e.g., GCSI) plus nutritional metrics.
3. Objective correlation: delayed emptying on a standardized 4-hour solid-meal study that aligns with the clinical picture (and medications that slow emptying addressed).
At that point, referral to a center with procedural expertise for G-POEM or consideration of gastric electrical stimulation becomes appropriate, with multidisciplinary evaluation (GI, nutrition, psychology, and, when needed, surgery).
What role do you see dietary modification and glycemic control playing alongside pharmacologic therapy in light of these recommendations?
Dr. Staller: They’re the bedrock. A small-particle, lower-fat, calorie-dense diet—often leaning on nutrient-rich liquids—can meaningfully reduce symptom burden. Partnering with dietitians early pays dividends. For diabetes, tighter glycemic control can improve gastric emptying and symptoms; I explicitly review medications that can slow emptying (e.g., opioids; consider timing/necessity of GLP-1 receptor agonists) and encourage continuous glucose monitor-informed adjustments. Pharmacotherapy sits on top of those pillars; without them, medications will likely underperform.
The guideline notes “considerable unmet need” in gastroparesis treatment. Where do you think future therapies or research are most urgently needed?
Dr. Staller: I see three major areas.
1. Truly durable prokinetics: agents that improve emptying and symptoms over months, with better safety than legacy options (e.g., next-gen motilin/ghrelin agonists, better-studied 5-HT4 strategies).
2. Endotyping and biomarkers: we need to stop treating all gastroparesis as one disease. Clinical, physiologic, and microbiome/omic signatures that predict who benefits from which therapy (drug vs G-POEM vs GES) would transform care.
3. Patient-centered trials: larger, longer RCTs that prioritize validated symptom and quality-of-life outcomes, include nutritional endpoints, and reflect real-world medication confounders.
Our guideline intentionally highlights these gaps to hopefully catalyze better trials and smarter referral pathways.
Dr. Staller is with the Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston.