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NCT Number: NCT07125586

Real-Time Diagnosis of Eosinophilic Nasal Polyps Using High-Sensitivity Spectroscopy

Chronic rhinosinusitis with nasal polyps (CRSwNP) is a common condition causing nasal congestion, discharge, and reduced sense of smell, seriously affecting patients' quality of life. A subtype called eosinophilic CRSwNP (eCRSwNP) is difficult to treat and often recurs after surgery.

Currently, diagnosing this subtype requires tissue samples after surgery, which delays treatment decisions and may lead to unnecessary surgeries. Our research team has developed a new, non-invasive diagnostic system using advanced spectral technology to detect a natural fluorescence marker inside eosinophils (a type of immune cell) in nasal polyps. This system can quickly identify eCRSwNP before surgery by shining a safe light on the nasal tissue and analyzing the fluorescence signals.

This study aims to evaluate how accurate and safe this real-time diagnostic system is in clinical practice. If successful, it will help doctors choose better personalized treatments, reduce unnecessary surgeries, lower recurrence rates, and ultimately improve patients' lives.

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Key information

Conditions

Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Affiliated Hospital of Qingdao University

Qingdao, Shandong, 266003, China

Location status: Recruiting

Location contact

顺科 李

CONTACT

[email protected]

+8618653394973

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Male and female subjects aged 18 to 65 years old
  • Subjects diagnosed with CRSwNP by nasal endoscopy, CT, or MRI preoperatively (in accordance with the diagnostic criteria of EPOS 2020)
  • Normal coagulation function (prothrombin time [PT], activated partial thromboplastin time [APTT], and platelet count are within the normal range)
  • No severe cardiopulmonary dysfunction or other comorbidities that affect the tolerance of general anesthesia and surgery
  • Women of childbearing age must take appropriate medical contraceptive measures during the study period and within 4 weeks after the end of the trial treatment
  • Patients with good compliance, who voluntarily participate in this clinical study and sign the informed consent form.

Exclusion criteria

  • Patients with other nasal and paranasal sinus diseases excluding chronic rhinosinusitis (such as nasal tumors, fungal sinusitis, and post-traumatic nasal deformities)
  • Patients with coagulation dysfunction, immunodeficiency, or long-term use of anticoagulant/antiplatelet drugs at the time of visit, and females during menstruation
  • Patients who have taken oral glucocorticoids within 1 month prior to the visit
  • Patients with a history of nasal endoscopic surgery or nasal radiotherapy
  • Pregnant or lactating women, or those with severe systemic diseases (such as uncontrolled hypertension, diabetes, hepatic or renal insufficiency)
  • Patients with incomplete clinical data or missing postoperative follow-up data
  • Any other conditions deemed by the researcher as making the subject unsuitable for participating in the trial
  • Patients with poor treatment compliance

Treatment and study plan

High-Sensitivity Spectroscopy with Autofluorescence for eCRSwNP Diagnosis

Diagnostic Test

This intervention employs a non-invasive diagnostic procedure using a high-sensitivity spectroscopy system with autofluorescence to identify eosinophilic chronic rhinosinusitis with nasal polyps (eCRSwNP). A specialized thin probe, guided by an endoscopic light source, contacts nasal polyp tissue to emit a proprietary wavelength laser light, exciting fluorescent substances (primarily flavin adenine dinucleotide, FAD). The probe captures autofluorescence signals at a specific emission wavelength, and signal intensity analysis distinguishes eosinophilic from non-eosinophilic polyps in real-time. Unlike invasive histopathological diagnosis via biopsy or surgery, this method enables rapid preoperative typing. Conducted once at the initial visit, results are validated against post-biopsy/surgical histopathology (gold standard) to assess diagnostic accuracy (sensitivity ≥90%, specificity ≥85%). Safety is monitored for adverse events like mucosal irritation or bleeding within 24 hours.

Primary outcomes

  1. The agreement between the results of device-based typing diagnosis and the pathological gold standard

    Time frame: From initial device-based diagnostic testing at the baseline visit (Day 0) to histopathological confirmation of nasal polyp tissue obtained via biopsy or surgery, up to 14 days post-procedure.

    The agreement between the device-based typing diagnosis and the pathological gold standard is assessed by comparing the classification of nasal polyps as eosinophilic or non-eosinophilic using the high-sensitivity spectroscopy system with autofluorescence to the histopathological results from biopsy or surgical sampling. Agreement is measured using the Cohen's kappa coefficient, where a value of 0 indicates no agreement beyond chance, and 1 indicates perfect agreement. The target is a kappa coefficient ≥0.80, indicating substantial agreement. Sensitivity (≥90%) and specificity (≥85%) of the device-based diagnosis are also calculated, with histopathology as the reference standard.

Study contacts

Contact information is provided by the study sponsor or research team.

Shunke Li, MD

CONTACT

[email protected]

+86 18653394973

Yan Jiang, MD

CONTACT

[email protected]

+86 13256875886

Sponsors and collaborators

Lead sponsor

The Affiliated Hospital of Qingdao University

Other

Registry information

Official study title

Evaluation of Efficacy and Safety of a Real-time Typing Diagnosis System for Eosinophilic Nasal Polyps Based on High-sensitivity Spectroscopy Technology

Acronym: REDENP

Important dates

Study start
2025
Primary completion
2028
Study completion
2028
First posted
Aug 15, 2025
Registry last updated
Dec 30, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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