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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT03729661
Other study ID # ENTheR
Secondary ID
Status Completed
Phase N/A
First received
Last updated
Start date April 18, 2019
Est. completion date January 3, 2020

Study information

Verified date December 2019
Source Maastricht Radiation Oncology
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Due to breathing and other motions, tumours, such as breast and lung cancer, as well as their surrounding organs (e.g. the heart), move, which poses a challenge for radiotherapy treatment. Reducing or even stopping breathing, e.g. by irradiating during inspiration, is a way to decrease tumour and organ motion resulting in a reliable target coverage with smaller margins. These smaller margins can result in a better sparing of normal tissues. Furthermore, in some patients, during inspiration, the heart may move away from the target volume making it possible to better spare the heart. Finally, during inspiration, the lung volume is larger and the lung density is lower, which can lead to a lower dose to the surrounding normal lung tissue. Reduction of radiation dose to normal tissues leads to less radiation-induced toxicity. This makes treating breast and lung cancer patients in breath hold (BH) conditions an attractive strategy. Standard BH durations in RT treatment are around 20 seconds, which is not enough to perform a complete CBCT. The health status of lung cancer patients is generally worse compared to breast cancer patients, making it more difficult to treat this patient group during breath hold. Nasal High Flow Therapy (NHFT) is a non-invasive system that provides controlled oxygen concentrations and low levels of positive pressure via a nasal interface. NHFT improves oxygenation in diverse patient groups, and is increasingly used as an alternative to mechanical ventilatory support. It has been shown to be a safe device in several clinical situations and patient populations, such as COPD patients, but also in apneic conditions under general anesthesia.


Description:

Due to breathing and other motion, tumours, such as breast and lung cancer, as well as their surrounding organs (e.g. the heart), move, which poses a challenge for radiotherapy treatment. Reducing or even stopping breathing, e.g. by irradiating during inspiration, is a way to decrease tumor and organ motion resulting in a reliable target coverage with smaller margins. These smaller margins can result in a better sparing of normal tissues. Furthermore, in some patients, during inspiration, the heart may move away from the target volume making it possible to better spare the heart. Finally, during inspiration, the lung volume is larger and the lung density is lower, which can lead to a lower dose to the surrounding normal lung tissue. Reduction of radiation dose to normal tissues leads to less radiation-induced toxicity. This makes treating breast and lung cancer patients in breath hold (BH) conditions an attractive strategy. A BH has to be stable and long enough for the duration of a planning CT-scan, cone beam CT (CBCT) scan and treatment delivery. Treatment of left-sided breast cancer with radiotherapy in moderate deep inspiration breath hold (mDIBH) is well established. Also, in MAASTRO clinic, left-sided breast cancer patients are treated in mDIBH, but this is done without any support or control of the breath hold. Standard BH durations in RT treatment are around 20 seconds, which is not enough to perform a complete CBCT. The health status of lung cancer patients is generally worse compared to breast cancer patients, making it more difficult to treat this patient group during breath hold. mDIBH in lung cancer patients is therefore not widely used, and not yet performed in MAASTRO clinic. Ventilation techniques that can support patients in holding their breath might make it a feasible approach in patients with a less favourable performance status, and might increase the duration of a breath hold. Nasal High Flow Therapy (NHFT) is a non-invasive system that provides controlled oxygen concentrations and low levels of positive pressure via a nasal interface. NHFT improves oxygenation in diverse patient groups, and is increasingly used as an alternative to mechanical ventilatory support. It has been shown to be a safe device in several clinical situations and patient populations, such as COPD patients, but also in apneic conditions under general anesthesia. It has however never been used in the context of breath hold support, neither has it been used in radiotherapy practice. The investigators hypothesize that supporting BH with nasal high flow therapy (NHFT) will allow robust radiotherapy treatments of moving targets in a broad patient population allowing for BHs that are long enough, stable and reproducible during a whole treatment course.


Recruitment information / eligibility

Status Completed
Enrollment 20
Est. completion date January 3, 2020
Est. primary completion date January 3, 2020
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria:

- Locally advanced lung cancer or oligometastatic patients with "local" stage III, treated with curative or radical intent OR

- Left-sided breast cancer patients treated with radiotherapy with curative intent.

- WHO= 2

- = 18 years old

- Able to give informed consent

Exclusion Criteria:

- Patient refusal

- Hypercapnic COPD patient (= arterial carbon dioxide tension PaCO2 > 45 mmHg)

Study Design


Related Conditions & MeSH terms


Intervention

Behavioral:
Nasal High Flow Therapy
Use of Nasal High Flow Therapy during CT and treatment

Locations

Country Name City State
Netherlands Maastricht Radiation Oncology Maastricht

Sponsors (1)

Lead Sponsor Collaborator
Maastricht Radiation Oncology

Country where clinical trial is conducted

Netherlands, 

Outcome

Type Measure Description Time frame Safety issue
Primary Completing proportion (Tolerability) The proportion of patients completing the treatment (CT-scan and alle treatment sessions) in breath hold conditions using nasal high flow therapy (Tolerability of the treatment) 40 days
Secondary Poroportion of patients able to complete breathhold during training Proportion of patients in the population, able to do at least one breath hold of at least 90 seconds during the training session, measured by counting the absolute number of patients. 90 seconds
Secondary Investigation of the stability of a breath hold. Breath hold is considered stable if the variations during a breath hold are within 3 mm. Investigation of the stability of a breath hold, the position of the chest during the whole duration of the breath hold, monitored by the surface guidance system, installed in the CT and treatment room. Breath hold is considered stable if the variations during a breath hold are within 3 mm. 90 seconds
Secondary Reproduciblity of the breath hold The difference between the baseline chest position (during planning breath hold CT scan) and breath hold during each fraction. Overall radiation treatment schedule, varies up to 4 weeks.
Secondary Subjective tolerance as commented by volunteers Comments of volunteers after the test will be recorded as free text. Overall radiation treatment schedule, varies up to 4 weeks.
Secondary Subjective tolerance Comments of volunteers after the test will be recorded Overall radiation treatment schedule, varies up to 4 weeks.
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