[{"data":1,"prerenderedAt":170},["ShallowReactive",2],{"sanity-e7D-d179TxZCv7IXPCGPw5H6j65ICa84K3QdsE8hGJE":3},{"data":4,"sourceMap":-1},{"assessment":5,"clinicalReview":20,"definition":28,"evidence":33,"hero":78,"key":90,"medicalCondition":91,"meta":95,"pathways":99,"patientExperiences":116,"relatedReading":143},{"_type":6,"heading":7,"image":8,"introduction":14,"items":15},"assessment","Choosing Safe, Consultant-Led HBOT for Avascular Necrosis (AVN)",{"_type":9,"alt":10,"height":11,"src":12,"width":13},"baseImage","Dr Nur speaking with a patient during a medical consultation at NUMA",610,"\u002Fresources\u002Fimages\u002Fconsultation.webp",805,"HBOT is a medical treatment that requires specialist assessment and prescription to ensure it is safe, appropriate and tailored to your individual needs. Treatment is provided alongside, not in place of, your orthopaedic care.\n\nYour consultation with our specialist medical doctor includes:",[16,17,18,19],"Review of your medical history, symptoms, imaging and orthopaedic reports","Assessment of HBOT suitability and an individualised treatment prescription","Discussion of the available evidence, potential benefits and limitations","Ongoing medical supervision and review throughout treatment",{"_type":21,"heading":22,"introduction":23,"primaryAction":24},"clinicalReview","Hyperbaric Oxygen Therapy for Avascular Necrosis (AVN)","A clinical review of how HBOT may reduce bone hypoxia and marrow oedema, and what current evidence shows for pain, function, imaging and joint preservation.",{"_type":25,"href":26,"label":27},"action","\u002Farticles\u002Fhyperbaric-oxygen-therapy-avascular-necrosis-avn","Read the review",{"_type":29,"heading":30,"sections":31},"definition","What is Avascular Necrosis (AVN)?",[32],"Avascular necrosis, or osteonecrosis, develops when blood flow to bone is reduced or interrupted. It most often affects the femoral head and may progress to collapse, pain, loss of mobility and arthritis.",{"_type":34,"disclaimer":35,"heading":36,"primary":37,"supporting":50},"evidence","AVN is progressive, and treatment before femoral head collapse offers the best chance of preserving the joint. HBOT is an adjunct to standard orthopaedic care, not a replacement, with suitability assessed individually.","HBOT in Avascular Necrosis (AVN): What the Evidence Shows",{"_type":38,"heading":39,"introduction":40,"links":41},"evidenceItem","Pain, Function and Hip Preservation","A 2025 meta-analysis of 10 studies (568 patients) found significant improvements after HBOT in pain, hip function and physical quality of life. A 2026 analysis of 29 studies (2,177 hips) found HBOT particularly favourable for pain and quality of life and also assessed imaging progression, with further research needed to establish its effect on structural disease progression.",[42,46],{"_key":43,"href":44,"label":45},"520412fd2b3c","https:\u002F\u002Fdoi.org\u002F10.1530\u002Feor-2024-0167","Cao et al., 2025",{"_key":47,"href":48,"label":49},"e61914914d4d","https:\u002F\u002Fdoi.org\u002F10.3389\u002Ffcell.2026.1876711","Niu et al., 2026",[51,60,69],{"_key":52,"_type":38,"heading":53,"introduction":54,"links":55},"065fe51b8874","Pain and hip function","A randomised double-blind trial found significant improvements in pain and range of motion following 30 HBOT sessions in patients with Stage II AVN.",[56],{"_key":57,"href":58,"label":59},"f7a289fd5935","https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.arth.2010.05.005","Camporesi et al., 2010",{"_key":61,"_type":38,"heading":62,"introduction":63,"links":64},"c5372de28467","Early-stage MRI response","In Stage I AVN, MRI findings normalised in 81% of HBOT-treated patients following a three-month treatment course, compared with 17% of untreated controls.",[65],{"_key":66,"href":67,"label":68},"acb55b4687bc","https:\u002F\u002Fdoi.org\u002F10.1302\u002F0301-620x.85b3.13237","Reis et al., 2003",{"_key":70,"_type":38,"heading":71,"introduction":72,"links":73},"6720e1a7310d","Long-term joint preservation","In Stage I–II AVN, 88% of joints showed MRI improvement after HBOT, with 93% of followed joints preserved at an average 11-year follow-up.",[74],{"_key":75,"href":76,"label":77},"5d483e430c2e","https:\u002F\u002Fdoi.org\u002F10.3928\u002F01477447-20150305-57","Koren et al., 2015",{"_type":79,"breadcrumbLabel":80,"heading":81,"img":82,"introduction":87,"secondaryAction":88},"hero","Avascular Necrosis ","Hyperbaric Oxygen Therapy for Avascular Necrosis",{"_type":9,"alt":83,"height":84,"src":85,"width":86},"X-ray image of the pelvis and both hip joints, with the right hip highlighted in red to indicate pain, inflammation, or an area of concern",1080,"\u002Fresources\u002Farticles\u002Favn\u002Fcover.jpeg",1920,"Hyperbaric Oxygen Therapy (HBOT) may support selected patients with early-stage AVN. At NUMA, treatment is individually assessed, medically prescribed and supervised alongside orthopaedic care.",{"_type":25,"href":26,"label":89},"Explore the evidence","hyperbaric-oxygen-therapy-for-avascular-necrosis",{"alternateName":92,"name":94},[93],"AVN","Avascular Necrosis",{"_type":96,"description":97,"title":98},"meta","Hyperbaric Oxygen Therapy for Avascular Necrosis in London. Learn how HBOT may support bone healing, reduce inflammation and help preserve joint function.","Hyperbaric Oxygen Therapy for Avascular Necrosis - NUMA",{"_type":100,"disclaimer":101,"heading":102,"introduction":103,"items":104},"pathways","Every treatment plan is personalised. The number, frequency and timing of HBOT sessions vary according to individual clinical circumstances and may change as treatment progresses.","Typical treatment pathways","Every plan begins with a medical questionnaire reviewed by Dr Nur, followed by a consultation where she prescribes a customised programme — determining the optimal duration, frequency, and total number of sessions.",[105,111],{"_key":106,"_type":107,"description":108,"sessions":109,"title":110},"e716394a8087","pathwaysItem","Studies commonly use 30–40 sessions, five days a week, with each session lasting about 90 minutes at 2.0–2.5 ATA.","30–40 sessions","Early-stage AVN",{"_key":112,"_type":107,"description":113,"sessions":114,"title":115},"eb58f553b534","Once collapse or advanced arthritis has occurred, HBOT is unlikely to preserve the joint. It may still support recovery around surgery, while hip replacement may become the main treatment pathway.","Limited role in hip preservation"," Late-stage AVN",{"_type":117,"category":118,"disclaimer":119,"heading":120,"introduction":121,"reviews":122},"patientExperiences","Bone & Joint Recovery","Individual experiences vary and testimonials should not be taken as evidence of treatment outcomes.","Patient experiences","Don't just take our word for it — hear directly from patients who have completed treatment with us.",[123,131,137],{"_key":124,"_type":125,"rating":126,"reviewerName":127,"sections":128,"url":130},"317eba0c3c6d","review",5,"Ingrida Michmel ",[129],"As a former athlete, I had struggled with a nagging injury for years that had developed into chronic pain in my left hip and leg. To my surprise, after just one session of Hyperbaric Oxygen Therapy, I noticed a significant improvement in my pain levels and mobility. The stiffness that had been plaguing me for years had disappeared, and I felt like a weight had been lifted off of me.","https:\u002F\u002Fmaps.app.goo.gl\u002F4EPZxPf6f4WMVUwo6",{"_key":132,"_type":125,"rating":126,"reviewerName":133,"sections":134,"url":136},"f793fdae141e","Alex Jackson",[135],"Following a serious bone break and 2 subsequent surgeries I have been having treatment at Numa and have to recommend it based on my experiences so far. The team are really welcoming and attentive and the clinic is really nice and calm. I have another 10 sessions booked in order to speed my recovery up and help the healing process.","https:\u002F\u002Fmaps.app.goo.gl\u002FuM7eJnA32cDY28vS8",{"_key":138,"_type":125,"rating":126,"reviewerName":139,"sections":140,"url":142},"97da9b8a6f19","Holly Price",[141],"Visited Numa for 10 sessions and it drastically improved my pain levels and inflammation post leg surgery. The clinic and staff are lovely and I'm very happy with the outcome.","https:\u002F\u002Fmaps.app.goo.gl\u002F7zwcRqBR3hrbzno79",{"_type":144,"heading":145,"items":146},"relatedReading","Related reading on Avascular Necrosis (AVN)?",[147,153,161],{"_key":148,"_type":149,"description":150,"href":26,"img":151,"title":22,"type":152},"624e6de1a137","relatedReadingItem","A review of the evidence for HBOT in avascular necrosis, including bone marrow oedema and early, pre-collapse disease.",{"_type":9,"alt":83,"height":84,"src":85,"width":86},"article",{"_key":154,"_type":149,"description":155,"href":156,"img":157,"title":160,"type":152},"4d8aab7f65d6","How HBOT is used to support tissue repair, reduce oedema and aid recovery in athletes and active patients.","\u002Farticles\u002Fhyperbaric-oxygen-therapy-for-high-performance-athlete-recovery",{"_type":9,"alt":158,"height":84,"src":159,"width":86},"A man sitting on a tennis court holds his injured ankle, which is highlighted with a red glow and anatomical overlay. A tennis racket, ball and water bottle are beside him.","\u002Fresources\u002Farticles\u002Fsports-injury\u002Fcover.webp","HBOT for High-Performance Athlete Recovery",{"_key":162,"_type":149,"description":163,"href":164,"img":165,"title":168,"type":169},"c016dcd48e59","A walk-through of a session at the clinic, from medical assessment and monitoring to time in the chamber.","\u002Farticles\u002Fwhat-to-expect-during-your-visit-to-numa",{"_type":9,"alt":166,"height":84,"src":167,"width":86},"Hyperbaric Oxygen Therapy rooms at NUMA","\u002Fresources\u002Farticles\u002Fwhat-to-expect\u002Fcover.webp","What to expect during your visit to NUMA","guide",1787916865954]