Nghiên cứu đặc điểm hình ảnh cộng hưởng từ hoại tử vô khuẩn chỏm xương đùi ở những bệnh nhân có chỉ định thay khớp háng

Study the magnetic resonance imaging characteristics in patients with hip joint repiacement indicattion

SUMMARY

Objectives:

1) Characterization of magnetic resonance images aseptic necrosis of the femoral head in patients with hip replacement appointed.

2) Characterization of magnetic resonance images of the contralateral hip in patients people on.

Objects and methods of research: Retrospective study of 60 patients with aseptic necrosis of the femoral head surgery during 2014- 2015 at a hospital in Hanoi Medical University and Hospital Vietnam Germany.

Results: The patients having hip replacement appointed two phase III and IV. All patients had femoral head collapse and are mostly seen when patients have hip osteoarthritis secondary (75% stage IV). Hypointense region was 73.3% stage III, stage IV, 93.3%, in line with a high prevalence of bone marrow showing the progression of the disease is> 85%. Rate aseptic necrosis of the femoral head in the contralateral hip joint meeting with the high rate of 80%, occur in all phases. Photos CHT at an early stage (I and II) are more common form hypointense band (77.4%), bone marrow lesions form T1-weighted images are shaped ring (61.3%), lesions of the subclass A (74.2%). Late stage (III and IV) characteristic image is under the cartilage fracture and femoral head collapse, besides that other image: hypointense on T1-weighted images region (70.5%), the image of subclass D (52.9%).

Conclusions: MRI allows an accurate assessment stage lesions of clinical help for prognosis and hip replacement decision at the right time, at the same time to detect aseptic necrosis of the femoral head in the contralateral hip though no clinical symptoms, so that early treatment measures or prevent the more severe complications.

Keywords: Aseptic necrosis of the femoral head.