RECRUITINGINTERVENTIONAL

High-flow Oxygen for Vaso-occlusive Pain Crisis

A Multicentre, Prospective, Randomized, Multi-arm, Multi-stage Clinical Trial of High-flow Oxygen for Vaso-occlusive Pain Crisis in Adult Patients With Sickle Cell Disease;

About This Trial

Sickle cell disease (SCD) is characterized by recurrent vaso-occlusive pain crisis (VOC), which may evolve to acute chest syndrome (ACS), the most common cause of death among adult patients with SCD. Currently, there is no safe and effective treatment to abort VOC or prevent secondary ACS. Management of VOC mostly involve a symptomatic approach including hydration, analgesics, transfusion, and incentive spirometry, which was investigated in a very limited number of patients (\<30). The polymerisation of HbS is one major feature in the pathogenesis of vaso-occlusion. Among factors determining the rate and extent of HbS polymer formation, the hypoxic stimulus is one of the most potent and readily alterable. Current guidelines recommend oxygen therapy in patients with VOC in order to maintain a target oxygen saturation of 95%. Low-flow nasal oxygen (LFNO) is routinely used to achieve this normoxia approach, particularly in patients at risk of secondary ACS because they may experience acute desaturation. In contrast, various case series suggest a potential beneficial role of intensified oxygen therapy targeting hyperoxia for the management of VOC, particularly with the use of hyperbaric oxygen, but the latter is difficult to implement in routine clinical practice. A recent high-flow nasal oxygen (HFNO) technology allows the delivery of humidified gas at high fraction of inspired oxygen (FiO2) through nasal cannula. The FiO2 can be adjusted up to 100% (allowing hyperoxia that may reverse sickling) and the flow can be increased up to 60 L/min (which generates positive airway pressure and dead space flushing, that may prevent evolution of VOC towards ACS by alleviating atelectasis and opioid-induced hypercapnia). In patients with acute respiratory failure, HFNO has been shown to improve patient's comfort, oxygenation, and survival as compared to standard oxygen or non-invasive ventilation. The aim of the present study is to test the efficacy and safety of HFNO for the management of VOC and prevention of secondary ACS. The investigators will use a multi-arm multi-stage (MAMS) design to achieve these goals. HFNO will be delivered through AIRVO 2 (Fisher and Paykel Healthcare, New Zealand), a device that incorporates a turbine allowing its use in hospital wards.

Who May Be Eligible (Plain English)

Who May Qualify: - Age ≥ 18 years; - Patient with major sickle cell disease syndrome (SS, SC, Sβ0 or Sβ+); - VOC as defined by acute pain or tenderness, affecting at least one part of the body, including limbs, ribs, sternum, head (skull), spine, and/or pelvis, that requires opioids and is not attributable to other causes; - Intermediate-to-high risk for secondary ACS derived from the PRESEV score (Bartolucci et al, EBioMedicine 2016) as follows: a reticulocyte count \>216 G/L OR at least two of the followings : i) spine and/or pelvis CPS \>1; ii) leucocyte count \>11G/L; iii) hemoglobin ≤ 9 g/dL; in case of long-term treatment by hydroxyurea, only one of the above mentioned criteria will be needed, given its effects on hemoglobin, leucocyte and reticulocytes counts; - willing to sign a consent form; - Patient affiliated to social security Who Should NOT Join This Trial: The presence at inclusion of a primary ACS. Primary ACS is defined by the combination at time of randomization of a clinical sign \[chest pain or auscultatory abnormality (crepitants and/or bronchial breathing)\] with a new pulmonary infiltrate (on chest film, thoracic scan, or lung ultrasound); - VOC with need of parenteral opioids lasting longer than 72 hours at time of inclusion; - Known pregnancy or current lactation; Women of child bearing potential will be tested for pregnancy before inclusion; - Known cerebral vasculopathy or past medical history of stroke, due to Moya Moya or persisting visible macrovessel stenosis/occlusion; - Known ischemic heart disease or typical chest angina; - Patient who is currently enrolled in other investigational drug study; - Known legal incapacity, - Prisoners or subjects who are involuntarily incarcerated - Anatomical factors precluding placement of a nasal cannula Always talk to your doctor about whether this trial is right for you.

Original Eligibility Criteria

View original clinical language

Inclusion Criteria: * Age ≥ 18 years; * Patient with major sickle cell disease syndrome (SS, SC, Sβ0 or Sβ+); * VOC as defined by acute pain or tenderness, affecting at least one part of the body, including limbs, ribs, sternum, head (skull), spine, and/or pelvis, that requires opioids and is not attributable to other causes; * Intermediate-to-high risk for secondary ACS derived from the PRESEV score (Bartolucci et al, EBioMedicine 2016) as follows: a reticulocyte count \>216 G/L OR at least two of the followings : i) spine and/or pelvis CPS \>1; ii) leucocyte count \>11G/L; iii) hemoglobin ≤ 9 g/dL; in case of long-term treatment by hydroxyurea, only one of the above mentioned criteria will be needed, given its effects on hemoglobin, leucocyte and reticulocytes counts; * Informed consent; * Patient affiliated to social security Exclusion Criteria: The presence at inclusion of a primary ACS. Primary ACS is defined by the combination at time of randomization of a clinical sign \[chest pain or auscultatory abnormality (crepitants and/or bronchial breathing)\] with a new pulmonary infiltrate (on chest film, thoracic scan, or lung ultrasound); * VOC with need of parenteral opioids lasting longer than 72 hours at time of inclusion; * Known pregnancy or current lactation; Women of child bearing potential will be tested for pregnancy before inclusion; * Known cerebral vasculopathy or past medical history of stroke, due to Moya Moya or persisting visible macrovessel stenosis/occlusion; * Known ischemic heart disease or typical chest angina; * Patient who is currently enrolled in other investigational drug study; * Known legal incapacity, * Prisoners or subjects who are involuntarily incarcerated * Anatomical factors precluding placement of a nasal cannula

Treatments Being Tested

DEVICE

Stadard low-flow oxygen

In the control group, standard low-flow oxygen will be delivered via nasal prongs (LFNO), up to hospital discharge or secondary ACS onset, in order to achieve normoxia (target pulse oxymetry saturation of 95%). This strategy is in accordance with current recommendations and usual care

DEVICE

HFNO with low FiO2 (21%-30%)

HFNO with low FiO2 (21%-30%) targeting normoxia: to test the effect of improved pulmonary function

DEVICE

HFNO with intermediate FiO2 (50%)

In this group, FiO2 will be set at 50% during the first 24 hours of intervention to target moderate hyperoxia, then reduced to 21-3025% during the following 48 hours to target normoxia

DEVICE

HFNO with high FiO2 (100%)

In this group, FiO2 will be set at 100% during the first 24 hours of intervention to target intense hyperoxia, then reduced to 21-3025% during the following 48 hours to target normoxia

Locations (1)

Henri Mondor

Créteil, France