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 CASE REPORT
Year : 2009  |  Volume : 57  |  Issue : 1  |  Page : 69--72

The influence of hypoglycemia on cerebral blood flow in cases of hypoglycemic coma


1 Department of Neurosurgery, Osaka City University Graduate School of Medicine, Osaka, Japan
2 Department of Neurosurgery, Shinsapporo Neurosurgical Hospital, Hokkaido, Japan

Correspondence Address:
Yuzo Terakawa
Department of Neurosurgery, Osaka City University Graduate School of Medicine 1-4-3, Asahi-machi, Abeno-ku, Osaka 545-8585
Japan
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0028-3886.48814

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The authors report two cases of hypoglycemic coma in which both diffusion-weighted imaging (DWI) and single photon emission computed tomography (SPECT) were used. A 74-year-old woman (case 1) presented with deep coma associated with hypoglycemia (blood glucose level: 20 mg/dl), and DWI on admission revealed extensive hyperintensity lesions. SPECT obtained on the second hospital day revealed diffuse hyperperfusion and a follow-up SPECT on the eighth hospital day showed relative hypoperfusion. An 89- year- old woman (case 2) presented with coma associated with hypoglycemia (blood glucose level: 45 mg/dl), and DWI showed diffuse hyperintensity lesions in both hemispheres. SPECT obtained on the ninth hospital day showed relative hypoperfusion compared to the first scan obtained on the third hospital day. Although the blood glucose level was rapidly corrected, the level of consciousness remained unchanged in both cases. Our results suggest that cerebral blood flow may increase even after glucose correction and that relative hypoperfusion could occur in the subacute stage of hypoglycemic coma.






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