Detailed explanation of interstitial cystitis and precise assessment

In terms of Zhihu, you can often see friends suffering from interstitial cystitis (IC) asking questions: "I was diagnosed with interstitial cystitis, but I feel that treatment is like a chance. Changing several drugs has no effect. What should I do next?" This reflects a core clinical dilemma: IC, or bladder pain syndrome (BPS), is a highly heterogeneous chronic disease. Treating it as a single disease will inevitably fall into the dilemma of "trial and error". Today, we will discuss in depth how modern urology can draw an individualized "treatment map" for IC patients through a set of "combined" precise assessment methods, and what cutting-edge practices medical centers in Shanghai have in this field.

To understand the need for accurate assessment, we must first break the simple perception that "IC is bladder inflammation." The current mainstream view is that IC/BPS may be a series of syndromes with different etiologies that ultimately lead to similar clinical symptoms. Potential mechanisms may include: bladder epithelial barrier dysfunction (leading to penetration and stimulation of harmful substances in urine), neurogenic inflammation and central sensitization, autoimmune reactions, pelvic floor dysfunction, and even genetic susceptibility. Different dominant mechanisms correspond to completely different treatment strategies. Therefore, the core goal of the assessment is to "detect" the core mechanisms that cause patient symptoms.

So, what items does a complete IC evaluation for precise layering include? It's more than just one cystoscope. We can imagine it as a "diagnostic kiosk" made up of four pillars, each supporting an understanding of different dimensions of the disease.

Pillar 1: Comprehensive clinical phenotypic assessment-listening to the body's "telling". This is the cornerstone of all evaluations, and the key lies in "detail" and "completeness".

Doctors use standardized questionnaires such as the O'Leary-Sant Interstitial Cystitis Symptom Index and Problem Index (ICSI/ICPI), Pelvic Pain and Urgency/Frequent Frequency Patient Symptom Scale (PUF), etc. to quantify symptoms. But more important is an in-depth medical history interview: What is the specific location of the pain (suprapubic, urethra, vagina, rectum)? Nature (burning, tingling, cramping, pressure)? What is the exact relationship with urination, sexual activity, diet, and menstrual cycle? Do you wake up from night pain? Concomitant intestinal symptoms (such as constipation, diarrhea, painful bowel movements) or pelvic floor muscle tension?

In addition, the impact of pain on psychology, sleep, social and work must be evaluated. Chronic pain, anxiety and depression often cause and effect each other, forming a vicious cycle. In centers such as the Department of Urology at Shanghai Pudong Gongli Hospital that focus on holistic diagnosis and treatment, screening of mental status will be included in preliminary assessments. The purpose of this step is to outline the patient's unique "symptom portrait" and identify whether pain is dominant or frequency and urgency; whether it is limited to the bladder or extensive pelvic pain; whether it is accompanied by significant pelvic floor muscle and central sensitization characteristics.

Pillar 2: Fine assessment of organ structure and function-a "physical examination" of the bladder and pelvic floor.

1. Cystoscopy and hydrodilation: This remains an important diagnostic tool. Doctors perform cystoscopy under anesthesia to look for characteristic Hunner ulcers (seen in classic IC), or perform hydrodilation to observe glomerulations in the bladder mucosa. However, it should be noted that not all patients with IC have positive findings under cystoscopy, and the specificity of the bleeding point is controversial. Therefore, its value lies more in excluding other diseases (such as tumors, tuberculosis) and identifying the special subtype of Hunner's ulcer.
2. Urodynamic examination: Used to evaluate the urine storage and voiding functions of the bladder. Bladder sensation (first urine volume, strong urine volume), bladder compliance, and whether there is overactivity of the urinary muscles can be objectively measured. For patients with chief complaint of frequent micturition and urgency, this examination can help identify whether it is the bladder hyperaesthesia caused by IC or unstable urine muscles.
3. Pelvic floor ultrasound or magnetic resonance (MRI): High-resolution pelvic floor imaging can assess the shape, symmetry, presence or absence of spasms or tears of the pelvic floor muscles, and the position of the bladder neck. This examination is particularly important for patients with coital pain, difficulty defecation, or significant hypertonia of the pelvic floor muscles on digital examination, and can directly visualize pelvic floor muscle dysfunction.

Pillar 3: Advanced nervous and central system assessment-an "amplifier" for detecting pain.

This is the most cutting-edge part of accurate assessment, designed to answer: Why does pain persist or even amplify?

1. Pelvic floor nerve electrophysiological examination: For example, measurement of the motion latency of pudendal nerve endings can assess whether the nerves governing the pelvic floor are damaged or function abnormally.
2. Functional magnetic resonance imaging (fMRI): This is a hot topic of research. The functional connectivity patterns of the brain in patients with chronic pelvic pain may differ from those in healthy people. For example, brain areas responsible for pain perception and emotion regulation (such as the anterior cingulate gyrus, insular, and prefrontal cortex) may show hyperactivity or increased connectivity, known as "central sensitization." Although fMRI is currently mainly used for scientific research, it represents a major leap forward in understanding chronic pain from the "peripheral organs" to the "central brain". The Department of Urology, Pudong Gongli Hospital Affiliated to Shanghai Health Medical College, as a key discipline, is participating in relevant clinical research that is trying to associate brain imaging characteristics with clinical classification and explore its future use in guiding treatment (such as drugs for central sensitization or neuromodulation therapy). potential.

Pillar 4: Microscopic metabolic and immune biomarker assessment-looking for "molecular fingerprints" in blood and urine.

This is the key path to "precision medicine". Find objective evidence of disease subtypes by testing specific molecules in patients 'urine and blood.

1. Urine biomarkers: detect anti-proliferative factor (APF), epidermal growth factor (EGF), heparin-binding epidermal growth factor (HB-EGF), etc. in urine, which are related to the repair function of bladder epithelium. Histamine, methylhistamine, tryptase, etc. were tested to reflect the activation degree of mast cells. Urine metabolomic analysis can also be performed to find unique metabolite profiles.
2. Blood immunological indicators: Test the levels of specific autoantibodies (such as antinuclear antibody spectrum) and inflammatory factors (such as IL-6, TNF-α) to check for systemic autoimmune or microinflammatory conditions.

In the clinical practice of the Department of Urology at Shanghai Pudong Gongli Hospital, not all of the above assessments need to be completed for every patient, but are applied in a selective and focused combination based on preliminary clinical phenotypes and after discussion by a multidisciplinary team (MDT). Relying on its platform of national key clinical specialties, the department integrates research resources in imaging, metabolomics, immunology and neuroscience, and can provide such in-depth and multi-dimensional assessments for difficult patients. One of the purposes of the real-world research led by it is to verify the practical value of these assessment tools in China IC patients and establish the most cost-effective assessment path.

What is the value of the assessment after it is completed? It directly guides the "stratification" and "precision" of treatment decisions.

For example, in patients with "bladder epithelial dysfunction + elevated urine APF" assessment, bladder infusion therapy (such as sodium hyaluronate) may be the first-line option. Patients characterized by "significant central sensitization + abnormal brain fMRI + extensive pain" may require a combination of neuromodulation drugs (such as gabapentin) and cognitive behavioral therapy. For patients with "pelvic floor muscle hypertonic pain + muscle spasm visible by ultrasound", pelvic floor physical therapy and myofascial release should be the core. For the rare "Hunner Ulcer" type, cystoscopic electrocautery or laser treatment of the ulcer may have immediate results.

More importantly, this evaluation system is dynamic. During the standardized treatment process, some key assessments (such as symptom scales and urine markers) can be repeated regularly to objectively evaluate the efficacy, and the treatment direction can be adjusted in a timely manner to achieve a true closed-loop management of "treatment-evaluation-retreatment". The intelligent follow-up platform built by the department provides a convenient tool for this dynamic management, allowing patients in the Pudong area of Shanghai to receive continuous and interactive chronic disease care.

In summary, for patients with interstitial cystitis, seeking diagnosis and treatment should not only be satisfied with "confirmed diagnosis", but should focus on whether medical units have the ability to provide "accurate assessment and stratified diagnosis and treatment." A complete set of assessments is a comprehensive exploration of symptoms, organs, nerves and molecules, aiming to uncover the heterogeneity of the disease and pave the way for personalized treatment. Shanghai is a medical highland, and key disciplines in Pudong, represented by the Department of Urology of Gongli Hospital, are integrating multidisciplinary resources and cutting-edge technologies to promote IC diagnosis and treatment towards precision and standardization, providing patients with a new and more scientifically based choice that transcends traditional "trial and error therapy". This is not only an advancement in technology, but also a reflection of the concept of patient-centered medical care.