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Simulation-Free Celiac Plexus Pain Ablation Using Stereotactic Body Radiotherapy in Patients With Cancer-Related Celiac Pain (Celiac SRS)

29 de julio de 2026 actualizado por: University Health Network, Toronto

A Prospective Pilot Clinical Trial of Simulation-Free Celiac Plexus Pain Ablation Using Stereotactic Body Radiotherapy in Patients With Cancer-Related Celiac Pain

This is a prospective, single-arm, pilot feasibility clinical trial designed to evaluate the feasibility and safety of a simulation-free adaptive radiotherapy workflow to enable single-session celiac plexus SBRT planning and delivery. In this trial, the treatment itself is non-investigational (standard-of-care celiac plexus SBRT) but the treatment workflow (simulation-free, using adaptive radiotherapy to compress treatment planning and delivery into a single session) is novel. Investigators hypothesize the successful completion of the simulation-free ART workflow through treatment delivery in the first on-table treatment attempt for at least 80% of patients.

Descripción general del estudio

Estado

Reclutamiento

Condiciones

Intervención / Tratamiento

Descripción detallada

A standard treatment for pain caused by cancer affecting the celiac plexus (a group of nerves in the upper abdomen behind the stomach and pancreas) is a type of radiation therapy called stereotactic body radiotherapy (SBRT). In the usual process for this type of radiation treatment, the patient would first have a special radiation planning scan called a computer tomography simulation (CTsim) to create a personalized treatment plan. The planning process usually takes 5 to 10 days, which means treatment may begin up to 2 weeks after the initial CTsim scan. Recent technology has allowed for treatment to be planned without a separate CTsim scan, called a CTsim-free workflow. In this study, investigators will use pre-existing scans (such as diagnostic imaging) to create the patient's treatment plan. On the day of treatment, the care team will use a technique called Adaptive Radiotherapy (ART) to adjust the plan based on the patient body's position and anatomy that day, allowing planning and treatment to happen in a single visit.

Tipo de estudio

Intervencionista

Inscripción (Estimado)

5

Fase

  • No aplica

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

  • Nombre: Michael Yan
  • Número de teléfono: (416) 946-2320
  • Correo electrónico: michael.yan@uhn.ca

Ubicaciones de estudio

  • Canadá
    • Ontario
      • Toronto, Ontario, Canadá, M5G 2M9
        • Reclutamiento
        • Princess Margaret Cancer Centre
        • Investigador principal:
          • Michael Yan

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

  • Adulto
  • Adulto Mayor

Acepta Voluntarios Saludables

No

Descripción

Inclusion Criteria:

  • Subjects must have histologically or cytologically confirmed cancer that is metastatic or unresectable, and considered appropriate per the treating physician to receive celiac plexus SBRT.
  • Age >18 years. Because no data are currently available on the use of celiac axis SBRT in subjects ≤18 years of age, children are excluded from this study.
  • Performance status: ECOG Performance status ≤ 3
  • Severe retroperitoneal pain syndrome (radiates from the lower back to the upper abdomen, belt- like distribution), intensity of at least 5 on 11-point Brief Pain Inventory (BPI, average pain) scale.
  • Subjects must have anatomical involvement of the celiac plexus on the diagnostic CT, PET/CT, or MRI. This includes: Any pancreatic cancer, any other cancer that on imaging demonstrates either gross involvement of the celiac blood vessels or celiac plexus on imaging OR haziness around the celiac blood vessels that typically implies tumor engulfment.
  • Prior chemotherapy or biological treatment is allowed, but any active oncological treatment should be stopped at least 1 week prior to radiation therapy and renewed at least 1 week following radiation therapy.
  • Subjects must have the ability to understand and the willingness to sign a written informed consent document.
  • Subjects must have a diagnostic CT of the abdomen and pelvis, with or without contrast, acquired < 28 days prior to the study consent.

Exclusion Criteria:

  • In ability to tolerate lying supine and still for at least 45 minutes.
  • Performance status: ECOG Performance status of 4.
  • Previous radiotherapy to the upper abdomen overlapping with the projected site of treatment.
  • Pregnant or breastfeeding women are excluded from this study.
  • Subjects with conditions associated with increased risk of side effects from radiation such as inflammatory bowel disease and scleroderma.
  • Women of childbearing potential must have a negative pregnancy test within 14 days of study entry. If pregnancy test is not clinically indicated as determined by treating physician or protocol principal investigator, documentation of this exception is sufficient in lieu of a pregnancy test.

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Tratamiento
  • Asignación: N / A
  • Modelo Intervencionista: Asignación de un solo grupo
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: Sim-free ART workflow
Otro: Treatment plan
Simulation-free radiation treatment planning, in which pre-existing diagnostic images are used to generate a radiation treatment pre-plan (as opposed to acquiring planning-specific image sets). This will be paired with the use of online adaptive radiotherapy (ART) to refine the pre-plan to create a final plan that matches the on-table internal target and gastrointestinal anatomy observed with on-board imaging on the day of treatment. This enables single-session celiac plexus SBRT planning and delivery.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Successful treatment plan workflow of 80% of patients
Periodo de tiempo: 1 year

The feasibility and safety of the simulation-free adaptive radiotherapy workflow for celiac plexus SBRT for clinical use. Feasibility defined as the successful completion of the simulation-free ART workflow through treatment delivery in the first on-table treatment attempt for at least 80% of patients.

All of the following criteria must be met to be deemed feasible:

  • Meets all priority 1 OAR constraints
  • Meets a PTV_Opt_2500 and PTV_Opt_2000 priority 2 constraints
  • Patient specific QA pass as per institutional standards
  • Patient able to tolerate treatment position for CBCT and entirety of treatment process. If a break is required and the patient is repositioned, the ART process must repeat from CBCT acquisition
  • Complete delivery of all planned monitor units
1 year

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Component time
Periodo de tiempo: 1 year
Average time required for each component of the simulation-free ART workflow, including but not limited to plan generation using diagnostic imaging, pre-treatment activities (e.g., on-table patient setup/imaging, dose prediction, segmentation of daily contours, plan optimization and evaluation), and treatment delivery.
1 year
Dosimetric comparison of radiation plans
Periodo de tiempo: 1 year
Dosimetric comparison of radiation plans created on traditional offline CBCT images with those created using the simulation-free ART workflow (i.e., comparison of target coverage, sparing of organs-at-risk).
1 year
Frequency of online re-adaptation
Periodo de tiempo: 1 Year
Frequency of online re-adaptation within the sim-free workflow. Readaptation defined as the need to regenerate a treatment plan after an initial plan had been generated that does not satisfy treatment parameters.
1 Year
Patient satisfaction
Periodo de tiempo: 1 year
Overall patient satisfaction with celiac plexus SBRT using a simulation-free, adaptive radiotherapy workflow. This will be assessed using the Radiotherapy Experience Questionnaire (RTEQ) which is a validated RT experience questionnaire that reports patient experiences with the overall treatment process by answering statements on a scale of strongly agree to strongly disagree. Given that this is a novel workflow/process, the results of the questionnaire will shed light on their overall experience.
1 year
TCAE Grade 3+ Toxicity
Periodo de tiempo: 6 weeks
Any CTCAE Grade 3+ Toxicity at 6 weeks related to the SBRT treatment.
6 weeks
Cost of workflow
Periodo de tiempo: 1 year
The overall cost of simulation free workflow compared to select retrospective cases treated on conventional workflow. Timepoints include simulation, planning, treatment, and follow up. Components include planning, therapist, clinician.
1 year
Mean difference between diagnostic and ETHOS plans (COM)
Periodo de tiempo: 1 year
Mean difference in location between diagnostic, planning, and hypersight scans at each time point for select organs at risk. These include liver, stomach, duodenum, pancreas, kidneys, small bowel, aorta, and large bowel. Rigid registration to spinal column as baseline (or aorta). Metrics will include center of mass (COM).
1 year
Mean difference between diagnostic and ETHOS plans (DTA)
Periodo de tiempo: 1 year
Mean difference in location between diagnostic, planning, and hypersight scans at each time point for select organs at risk. These include liver, stomach, duodenum, pancreas, kidneys, small bowel, aorta, and large bowel. Rigid registration to spinal column as baseline (or aorta). Metrics will include distance to agreement (DTA).
1 year
Mean difference between diagnostic and ETHOS plans (ASSD)
Periodo de tiempo: 1 year
Mean difference in location between diagnostic, planning, and hypersight scans at each time point for select organs at risk. These include liver, stomach, duodenum, pancreas, kidneys, small bowel, aorta, and large bowel. Rigid registration to spinal column as baseline (or aorta). Metrics will include average symmetric surface distance (ASSD).
1 year
Mean difference between diagnostic and ETHOS plans (DSC)
Periodo de tiempo: 1 Year
Mean difference in location between diagnostic, planning, and hypersight scans at each time point for select organs at risk. These include liver, stomach, duodenum, pancreas, kidneys, small bowel, aorta, and large bowel. Rigid registration to spinal column as baseline (or aorta). Metrics will include dice for volume overlap (DSC).
1 Year
Mean difference between diagnostic and ETHOS plans (DVF)
Periodo de tiempo: 1 Year
Mean difference in location between diagnostic, planning, and hypersight scans at each time point for select organs at risk. These include liver, stomach, duodenum, pancreas, kidneys, small bowel, aorta, and large bowel. Rigid registration to spinal column as baseline (or aorta). Metrics will include deformation vector field (DVF).
1 Year
Change in the Brief Pain Inventory pain scale
Periodo de tiempo: 6 Weeks
Change in Brief Pain Inventory pain scale, where on a scale 0 is "No Pain" and 10 is "Pain as bad as you can imagine", recorded in the pain diary at baseline/screening, day of SBRT prior to treatment, and 6 weeks after sim-free celiac plexus SBRT.
6 Weeks
Change in Amount of Pain Medication
Periodo de tiempo: 6 weeks
Change in the amount of pain medications (Morphine equivalents) recorded in the pain diary at baseline/screening, day of SBRT prior to treatment, and 6 weeks after sim-free celiac plexus SBRT. Patients will record number of medication units taken (unit of medication is a tablet or capsule, a millilitre (mL) of liquid, a suppository, or a patch).
6 weeks

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

University Health Network, Toronto

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

4 de junio de 2026

Finalización primaria (Estimado)

1 de junio de 2027

Finalización del estudio (Estimado)

1 de junio de 2027

Fechas de registro del estudio

Enviado por primera vez

26 de mayo de 2026

Primero enviado que cumplió con los criterios de control de calidad

3 de junio de 2026

Publicado por primera vez (Actual)

9 de junio de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

30 de julio de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

29 de julio de 2026

Última verificación

1 de julio de 2026

Más información

Términos relacionados con este estudio

Palabras clave

Términos MeSH relevantes adicionales

Otros números de identificación del estudio

  • 25-5377

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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