본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Microvascular research v.115, 2018년, pp.12 - 19   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

The effect of age on the response of retinal capillary filling to changes in intraocular pressure measured by optical coherence tomography angiography

Jiang, Xiaoyun (Department of Bioengineering, University of Washington, Seattle, WA 98195, USA ); Johnson, Elaine (Casey Eye Institute, Oregon Health & Science University, Portland, OR 97239, USA ); Cepurna, William (Casey Eye Institute, Oregon Health & Science University, Portland, OR 97239, USA ); Lozano, Diana (Casey Eye Institute, Oregon Health & Science University, Portland, OR 97239, USA ); Men, Shaojie (Department of Bioengineering, University of Washington, Seattle, WA 98195, USA ); Wang, Ruikang K. (Department of Bioengineering, University of Washington, Seattle, WA 98195, USA ); Morrison, John (Casey Eye Institute, Oregon Health & Science University, Portland, OR 97239, USA );
  • 초록  

    Abstract Purpose To compare the effect of elevated intraocular pressure (IOP) on retinal capillary filling in elderly vs adult rats using optical coherence tomography angiography (OCTA). Methods The IOP of elderly (24-month-old, N = 12) and adult (6–8month-old, N = 10) Brown Norway rats was elevated in 10mmHg increments from 10 to 100mmHg. At each IOP level, 3D OCT data were captured using an optical microangiography (OMAG) scanning protocol and then post-processed to obtain both structural and vascular images. Mean arterial blood pressure (MAP), respiratory rate, pulse and blood oxygen saturation were monitored non-invasively throughout each experiment. Ocular perfusion pressure (OPP) was calculated as the difference between MAP for each animal and IOP at each level. The capillary filling index (CFI), defined as the ratio of area occupied by functional capillary vessels to the total scan area but excluding relatively large vessels of >30μm, was calculated at each IOP level and analyzed using the OCTA angiograms. Relative CFI vs IOP was plotted for the group means. CFI vs OPP was plotted for every animal in each group and data from all animals were combined in a CFI vs OPP scatter plot comparing the two groups. Results The MAP in adult animals was 108±5mmHg (mean±SD), whereas this value in the elderly was 99±5mmHg. All other physiologic parameters for both age groups were uniform and stable. In elderly animals, significant reduction of the CFI was first noted at IOP 40mmHg, as opposed to 60mmHg in adult animals. Individual assessment of CFI as a function of OPP for adult animals revealed a consistent plateau until OPP reached between 40 and 60mmHg. Elderly individuals demonstrated greater variability, with many showing a beginning of gradual deterioration of CFI at an OPP as high as 80mmHg. Overall comparison of CFI vs OPP between the two groups was not statistically significant. Conclusions Compared to adults, some, but not all, elderly animals demonstrate a more rapid deterioration of CFI vs OPP. This suggests a reduced autoregulatory capacity that may contribute to increased glaucoma susceptibility in some older individuals. This variability must be considered when studying the relationship between IOP, ocular perfusion and glaucoma in elderly animal models. Highlights Optical coherence tomography angiography is useful in investigating dynamic retinal capillary filling in small animal models. Elderly individuals demonstrate greater sensitivity of retinal capillary filling to elevated intraocular pressure than young adults. The relationship of retinal capillary filling to ocular perfusion pressure in elderly individuals is variable. Some elderly individuals demonstrate less autoregulatory capacity than young adults.


  • 주제어

    Retinal capillary blood flow .   Intra-ocular pressure .   Ocular perfusion pressure .   Optical coherence tomography .   Optical microangiography.  

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • 원문이 없습니다.
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기