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Pudendal Atherosclerosis by IVUS-NIRS in Men With Coronary Artery Disease (PUDENDAL-NIRS)

30 september 2026 uppdaterad av: Hospital Central Militar

Characterization of Internal Pudendal Atherosclerosis by Intravascular Ultrasound and Near-Infrared Spectroscopy and Its Relationship With Erectile Dysfunction in Men With Coronary Artery Disease

This prospective, single-center, exploratory study will evaluate the association between atherosclerotic and lipid plaque burden in the internal pudendal arteries, assessed by intravascular ultrasound and near-infrared spectroscopy (IVUS-NIRS), and the severity of erectile dysfunction in adult men with documented or suspected coronary artery disease undergoing clinically indicated coronary angiography.

After completion of the clinically indicated coronary procedure, eligible and hemodynamically stable participants with favorable pelvic vascular anatomy will undergo selective pudendal angiography and investigational IVUS-NIRS imaging of one or both internal pudendal arteries. Erectile function will subsequently be assessed within 30 days using the 5-item International Index of Erectile Function (IIEF-5).

The primary outcome will be the correlation between pudendal maxLCBI4mm and IIEF-5 score. Secondary analyses will characterize pudendal and coronary plaque burden, assess the relationship between pudendal and coronary lipid burden, evaluate associations with cardiovascular risk factors, and describe the technical feasibility and safety of pudendal IVUS-NIRS imaging.

Studieöversikt

Status

Rekrytering

Betingelser

Intervention / Behandling

Studietyp

Interventionell

Inskrivning (Beräknad)

60

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Studera Kontakt Backup

Studieorter

    • Mexico City
      • Mexico City, Mexico City, Mexiko, 11200
        • Rekrytering
        • Hospital Central Militar
        • Kontakt:
        • Kontakt:
        • Huvudutredare:
          • José Raúl Méndez Colin, MD
        • Underutredare:
          • Luis Enrique Berumen Domínguez, MD
        • Underutredare:
          • José Gadú Campos Salcedo, MD
        • Underutredare:
          • Edwin García Sánchez, MD
        • Underutredare:
          • Luis David Sánchez Mayo, MD
        • Underutredare:
          • Aldo Figueroa Peña, MD
        • Underutredare:
          • María Ximena Romo Cordero, MD
        • Underutredare:
          • Roberto Paniagua Jiménez, MD
        • Underutredare:
          • Eduardo Sánchez Cortés, MD
        • Underutredare:
          • Ángel Leovigildo Alberto Delgado, MD
        • Underutredare:
          • Alfredo Andrei Tort Hidalgo, MD
        • Underutredare:
          • Cesar Gerardo Galván Vargas, MD
        • Underutredare:
          • Mario Humberto Lozano Quintas, MD
        • Underutredare:
          • Jorge Alberto Silva Rendón, MD

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år och äldre (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Manlig

Beskrivning

Inclusion Criteria:

  1. Male participants aged 18 years or older.
  2. Documented or suspected coronary artery disease with a clinical indication for coronary angiography.
  3. Coronary IVUS-NIRS evaluation indicated by the treating interventional cardiologist.
  4. Sufficient clinical and hemodynamic stability to undergo the additional pudendal evaluation.
  5. Favorable pelvic vascular anatomy for selective angiography and safe advancement of the IVUS-NIRS catheter.
  6. Ability to complete the IIEF-5 questionnaire and provide information regarding sexual function.
  7. Written informed consent specifically for study participation and invasive evaluation of the internal pudendal arteries.
  8. Agreement to clinical follow-up by Cardiology and Urology.

Exclusion Criteria:

  1. Cardiogenic shock, hemodynamic instability, or acute clinical deterioration.
  2. Urgent or complicated coronary procedure in which prolonging the procedure would increase risk.
  3. Advanced kidney disease or high risk of kidney injury associated with additional contrast administration.
  4. Unfavorable iliofemoral or pelvic vascular anatomy for safe evaluation of the internal pudendal arteries.
  5. Severe coagulopathy, active bleeding, or contraindication to the invasive procedure.
  6. History of radical pelvic surgery or pelvic radiotherapy.
  7. Advanced prostate cancer or previous urologic treatment that predominantly explains erectile dysfunction.
  8. Severe untreated hypogonadism, advanced neurologic disease, or another predominant nonvascular cause of erectile dysfunction.
  9. Inability to reliably complete the IIEF-5 questionnaire.
  10. Refusal to participate or to provide study-specific written informed consent.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Diagnostisk
  • Tilldelning: N/A
  • Interventionsmodell: Enskild gruppuppgift
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Pudendal IVUS-NIRS Evaluation

Participants will undergo selective angiography of the internal iliac and internal pudendal arteries followed, when technically feasible and clinically safe, by investigational IVUS-NIRS imaging of one or both internal pudendal arteries.

Selective angiography of the internal iliac and internal pudendal arteries will be performed after completion of the clinically indicated coronary procedure to assess pelvic vascular anatomy and technical feasibility for intravascular imaging.

When vascular anatomy and clinical conditions are considered suitable, an IVUS-NIRS catheter will be advanced into one or both internal pudendal arteries. Automated pullback imaging will be performed to assess vessel anatomy, plaque burden, lipid core burden index (LCBI), and maxLCBI4mm.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Correlation Between Pudendal maxLCBI4mm and IIEF-5 Score
Tidsram: At the pudendal IVUS-NIRS procedure and within 30 days after enrollment for IIEF-5 assessment

The association between the maximum lipid core burden index within a 4-mm segment (maxLCBI4mm) of the internal pudendal arteries, measured by IVUS-NIRS, and erectile function assessed by the 5-item International Index of Erectile Function (IIEF-5) will be evaluated using Spearman correlation. Pudendal maxLCBI4mm ranges from 0 to 1000, with higher values indicating greater lipid burden. IIEF-5 scores range from 5 to 25, with lower scores indicating more severe erectile dysfunction.

At the pudendal IVUS-NIRS procedure and within 30 days after enrollment for IIEF-5 assessment

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Pudendal Artery Plaque Burden by IVUS
Tidsram: During the pudendal IVUS-NIRS procedure

Pudendal artery plaque burden will be quantified by intravascular ultrasound (IVUS) as the proportion of the vessel area occupied by plaque plus media. Measurements will include plaque burden, minimum lumen area, and angiographic percent stenosis in the evaluated internal pudendal arteries.

During the pudendal IVUS-NIRS procedure
Pudendal Artery Lipid Burden by NIRS
Tidsram: During the index pudendal IVUS-NIRS procedure

Lipid burden in the internal pudendal arteries will be characterized using near-infrared spectroscopy (NIRS), including the Lipid Core Burden Index (LCBI) and maximum LCBI within any continuous 4-mm segment (maxLCBI4mm). If both internal pudendal arteries are evaluated, measurements from each side will be recorded and the highest maxLCBI4mm per participant will be used for the main analyses.

During the index pudendal IVUS-NIRS procedure
Correlation Between Pudendal and Coronary maxLCBI4mm
Tidsram: During the index coronary and pudendal IVUS-NIRS procedures

The association between pudendal and coronary lipid burden will be assessed by correlating the highest pudendal maxLCBI4mm with the highest coronary maxLCBI4mm obtained by IVUS-NIRS. The correlation will be evaluated using Spearman correlation.

During the index coronary and pudendal IVUS-NIRS procedures
Pudendal Atherosclerotic and Lipid Burden According to Erectile Dysfunction Severity
Tidsram: Within 30 days after enrollment

Pudendal atherosclerotic and lipid burden, including plaque burden and maxLCBI4mm, will be compared across erectile dysfunction severity categories defined by the IIEF-5 score: no erectile dysfunction, mild, mild-to-moderate, moderate, and severe erectile dysfunction.

Within 30 days after enrollment
Spearman Correlation Between Pudendal maxLCBI4mm and LDL Cholesterol
Tidsram: At baseline

Spearman's rank correlation coefficient (rho) will be calculated between pudendal maxLCBI4mm measured by near-infrared spectroscopy (NIRS) and serum low-density lipoprotein cholesterol (LDL-C). Pudendal maxLCBI4mm is expressed as an index from 0 to 1000, with higher values indicating greater lipid burden. LDL-C is expressed in mg/dL.

At baseline
Number of Participants With Successful Pudendal IVUS-NIRS Image Acquisition
Tidsram: Periprocedural

The number of participants in whom analyzable IVUS-NIRS images are successfully obtained from at least one internal pudendal artery will be reported. Successful image acquisition is defined as acquisition of images of sufficient quality for quantitative IVUS and NIRS analysis.

Periprocedural
Procedure-Related Adverse Events
Tidsram: From the pudendal procedure through the 30-day study evaluation

Adverse events related to selective pudendal angiography and IVUS-NIRS imaging will be recorded, including arterial dissection, perforation, persistent vasospasm, thrombosis, bleeding, contrast-associated kidney injury, embolization, or other complications considered attributable to the investigational pudendal procedure.

From the pudendal procedure through the 30-day study evaluation

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Utredare

  • Huvudutredare: José Raúl Méndez Colin, MD, Hospital Central Militar
  • Studierektor: Luis Enrique Berumen Domínguez, MD, Hospital Central Militar

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

24 september 2026

Primärt slutförande (Beräknad)

1 december 2027

Avslutad studie (Beräknad)

1 december 2027

Studieregistreringsdatum

Först inskickad

25 september 2026

Först inskickad som uppfyllde QC-kriterierna

30 september 2026

Första postat (Faktisk)

2 oktober 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

2 oktober 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

30 september 2026

Senast verifierad

1 september 2026

Mer information

Termer relaterade till denna studie

Andra studie-ID-nummer

  • HCM-PUDENDAL-NIRS-2026

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

NEJ

IPD-planbeskrivning

Individual participant data (IPD) will not be shared because the study protocol and informed consent do not include a plan for external sharing of participant-level data. Study data will remain under institutional custody and will be used for the approved research objectives, analyses, and scientific publications while maintaining participant confidentiality.

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad läkemedelsprodukt

Nej

Studerar en amerikansk FDA-reglerad produktprodukt

Nej

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