Ultrasonographic measurement of subarachnoid space in normal term newborns

Narli, Nejat; Soyupak, Süreyya; Yapıcıoğlu, Hacer; Tutak, Ercan; Özcan, Kenan; Sertdemır, Yaşar; Satar, Mehmet

doi:10.1016/j.ejrad.2005.11.007

Cited by 15 publications

(17 citation statements)

References 7 publications

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“…As no consensus exists, the definition of a normal subarachnoid space width varies in the literature: in infants (below 1 year of age) the upper limits of normal craniocortical width range from 4 to 10 mm [56, 59, 94, 99, 138] and in neonates from 3.3 to 5 mm [58, 111, 120]. The defined upper limit of the normal interhemispheric fissure width ranges from 6 to 8.5 mm, while the similar spectrum for sinocortical width is 2 to 10 mm [56, 59, 69, 94, 99, 131].…”

Section: Resultsmentioning

confidence: 99%

Benign external hydrocephalus: a review, with emphasis on management

et al. 2011

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Benign external hydrocephalus in infants, characterized by macrocephaly and typical neuroimaging findings, is considered as a self-limiting condition and is therefore rarely treated. This review concerns all aspects of this condition: etiology, neuroimaging, symptoms and clinical findings, treatment, and outcome, with emphasis on management. The review is based on a systematic search in the Pubmed and Web of Science databases. The search covered various forms of hydrocephalus, extracerebral fluid, and macrocephaly. Studies reporting small children with idiopathic external hydrocephalus were included, mostly focusing on the studies reporting a long-term outcome. A total of 147 studies are included, the majority however with a limited methodological quality. Several theories regarding pathophysiology and various symptoms, signs, and clinical findings underscore the heterogeneity of the condition. Neuroimaging is important in the differentiation between external hydrocephalus and similar conditions. A transient delay of psychomotor development is commonly seen during childhood. A long-term outcome is scarcely reported, and the results are varying. Although most children with external hydrocephalus seem to do well both initially and in the long term, a substantial number of patients show temporary or permanent psychomotor delay. To verify that this truly is a benign condition, we suggest that future research on external hydrocephalus should focus on the long-term effects of surgical treatment as opposed to conservative management.

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Section: Resultsmentioning

confidence: 99%

Benign external hydrocephalus: a review, with emphasis on management

et al. 2011

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“…A study of 230 term newborns by Narlı et al found SAS values on CC measurements were 1.261±0.784 mm, with an increase identified with weight, height and head circumference (10). Another study of 278 newborns and infants aged from 1 day to 12 months showed an increase in SAS in the first month with age; however they reported a reduction in this over time (11).…”

Section: Resultsmentioning

confidence: 92%

Sonographic measurement of subarachnoid space and ventricular width in premature and mature newborns

Öztürk¹

2017

J Turgut Ozal Med Cent

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Aim: We aimed to measure the subarachnoid space and ventricular width with transfontanel sonography in premature and mature newborns and to identify the subarachnoid space/ventricular width ratio. Material and method: This prospective study included 123 premature and 121 mature newborns, totally 244 cases. All cases had sonographic investigation from the anterior fontanel with 4.8-11.0 MHz linear transducer. The subarachnoid space/ventricular width ratio was calculated. Analysis of variables was completed with SPSS 22.0 program; and independent samples T test was used for the comparisons between the groups. Results: The birth week, head circumference, weight and height values of mature newborns were higher compared to the premature newborns (p<0.001, for each). The subarachnoid space and ventricular width values for mature and premature newborns were 3.13±0.39 mm, 1.79±0.45 mm, and 3.45±0.47 mm and 2.02±0.54 mm, respectively (p<0.001, for each). The subarachnoid space/ventricular width ratios were 0.90±0.02 and 0.89±0.05 in mature and premature newborns with no difference identified between the groups (p=0.432). The result of Receiver Operating Curve analysis was that the threshold values for premature-mature distinction were 2.29 mm for subarachnoid space and 2.49 mm for ventricular width; and the sensitivity and specificity for both values were found to be 100% (p<0.001, for each). Conclusion: Subarachnoid space and ventricular width values vary according to the birth week of newborns, though the subarachnoid space/ventricular width ratio is not different. Transfontanel sonography is a useful imaging method for measurement of cerebrospinal fluid spaces in newborns.

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“…In postnatal studies SCW and CCW, which reflect the subarachnoid space in frontal region, were measured with transfontanel approach with a range of 0 and 6.3 mm (Libicher and Tröger 1992; Frankel et al 1998; Narli et al 2006; Sabouri et al 2011). In another study, Libicher and Tröger suggested 3 and 4 mm as cut-off values for SCW and CCW, respectively, since these were the next integer above 95th percentile (Ghai et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of fetal subarachnoid space using transabdominal ultrasonography and normal values during pregnancy

et al. 2016

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Objectives To determine the feasibility of evaluating the subarachnoid space by measuring two novel sonographic parameters in axial section using transabdominal ultrasound, in addition to the parameters previously defined in coronal section, and to construct a normal range for the subarachnoid space width in singleton healthy fetuses.MethodsHealthy pregnant women between 20 and 29 weeks were scanned using transabdominal ultrasound. Four variables were measured for the evaluation of subarachnoid space width; sinocortical width and anterior craniocortical width in coronal plane, and lateral and posterior craniocortical width in axial plane.ResultThe data of 154 patients were recorded. SCW could be measured in 87.6 % (135) of fetuses, while the same figure was 77.9 % (120), 96.1 % (151) and 98.1 % (148) for anterior, lateral and posterolateral CCW, respectively. The SCW and anterior CCW did not display a significant correlation with gestational age and head circumference. The mean of SCW was 1.55 ± 0.41 mm with a range of 0.85–3.87 mm. The mean anterior CCW was 1.63 ± 0.39 mm with a range of 0.85–2.82 mm. A linear regression line was plotted between gestational age and lateral CCW (r = 0.707; p < 0.0001) and posterolateral CCW (r = 0.437; p < 0.0001), and nomograms for these parameters are constructed.ConclusionThis study presents a novel approach for the in utero evaluation of the subarachnoid space with two measurements in axial plane using transabdominal ultrasound. The nomograms will be helpful when there is a suspicion of subarachnoid space dilatation during routine cranial scan.

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Ultrasonographic measurement of subarachnoid space in normal term newborns

Cited by 15 publications

References 7 publications

Benign external hydrocephalus: a review, with emphasis on management

Benign external hydrocephalus: a review, with emphasis on management

Sonographic measurement of subarachnoid space and ventricular width in premature and mature newborns

Evaluation of fetal subarachnoid space using transabdominal ultrasonography and normal values during pregnancy

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