Nội dung được dịch bởi AI, chỉ mang tính chất tham khảo
Sự suy giảm khả năng tự điều chỉnh lưu lượng máu đầu thần kinh thị giác trong phẫu thuật dịch kính ở bệnh nhân tăng huyết áp và tăng lipid máu
Tóm tắt
Mục đích: Để kiểm tra xem tăng huyết áp (HTN) và tăng lipid máu (HL) có ảnh hưởng đến khả năng tự điều chỉnh lưu lượng máu tại đầu dây thần kinh thị giác (ONH) trong quá trình phẫu thuật dịch kính hay không.
Thiết kế: Nghiên cứu đoàn hệ. Mười bảy mắt từ 17 bệnh nhân có HTN và HL và 19 mắt từ 19 bệnh nhân đối chứng không có rối loạn hệ thống đã trải qua phẫu thuật dịch kính để điều trị màng màng nội và lỗ hoàng điểm. Sau quá trình phẫu thuật dịch kính bằng 25-gauge qua vết mổ nhỏ tiêu chuẩn, tỷ lệ lòa trung bình (MBR), chỉ số lưu lượng máu ONH tương đối, trong vùng mạch (vascular MBR) và MBR trong vùng mô (tissue MBR) đã được đo bằng cách sử dụng phương pháp laser speckle flowgraphy. Các phép đo được thực hiện trước khi tăng huyết áp nội nhãn (IOP) khoảng 15-mmHg và sau 5 và 10 phút. Cả hai thông số đại diện cho giá trị tương đối của lưu lượng máu ONH (% so với giá trị cơ sở). Tỷ lệ phục hồi lưu lượng máu đến ONH được tính bằng công thức sau: (MBR tại 10 phút - MBR tại 5 phút)/(MBR tại giá trị cơ sở - MBR tại 5 phút). Áp suất perfusion của mắt ở tất cả các bệnh nhân đã giảm cả 5 và 10 phút sau khi tăng IOP. Vascular MBR ở các bệnh nhân có HTN và HL (75.5 ± 14.8) thấp hơn đáng kể so với nhóm đối chứng (86.7 ± 12.1) sau 10 phút tăng IOP (P = 0.019). Tỷ lệ phục hồi lưu lượng máu mạch máu thấp hơn đáng kể ở nhóm HTN và HL so với nhóm đối chứng (P = 0.002). Kết quả của chúng tôi cho thấy rằng HTN và HL gây suy giảm khả năng tự điều chỉnh trong thành phần mạch máu của lưu lượng máu ONH trong quá trình phẫu thuật dịch kính.
Từ khóa
#tăng huyết áp #tăng lipid máu #lưu lượng máu đầu dây thần kinh thị giác #phẫu thuật dịch kính #khả năng tự điều chỉnhTài liệu tham khảo
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