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[Venous cross-sectional area: measured or calculated?].
Ultraschall Med. 2000 Feb; 21(1):16-9.UM

Abstract

AIM

The aim of this study was to compare measured versus calculated venous cross-sectional area in healthy subjects in a standing and a lying position with normal breath-ing and during Valsalva manoeuvre.

METHOD

Measurements were carried out in 30 venous segments (the common femoral vein CFV, the superficial femoral vein SFV, the greater saphenous vein GSV) of 5 healthy volunteers (4 female, 1 male) with a median age of 28.7 years (range 23.4-46.7 years) in supine and standing position, while normally breathing and during a standardised Valsalva manoeuvre. Venous diameters were measured from B-mode in longitudinal view while cross-sectional areas were planimetrically assessed from transverse B-mode as recorded on video (S-VHS). The mathematical calculation of areas followed the formula (0.5 diameter)2 x pi. All investigations were performed 3 times; mean values from these 3 measurements were used for further computation. Measurements were performed using the NIH Image 1.6 program.

RESULTS

Correlation coefficients r of the calculated versus the measured venous area while normal breathing in standing and in lying subjects were: 0.92 and 0.82 in the CFV, 0.92 and 0.84 in the SFV as well as 0.98 and 0.97 in the GSV, respectively. During Valsalva manoeuvre in standing and lying subjects the correlation coefficients r amounted to: 0.94 and 0.93 in the CFV, 0.92 and 0.94 in the SFV as well as 0.99 and 0.98 in the GSV, respectively.

CONCLUSIONS

In healthy volunteers measured and calculated venous cross-sectional area at rest and during Valsalva manoeuvre correlate well. Correlation is numerically better in standing compared to lying subjects while normal breathing. Calculated venous area is accurate and can be used for further calculations.

Authors+Show Affiliations

Abteilung Angiologie, Universitätsspital Basel/Schweiz.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

ger

PubMed ID

10746279

Citation

Jeanneret, C, et al. "[Venous Cross-sectional Area: Measured or Calculated?]." Ultraschall in Der Medizin (Stuttgart, Germany : 1980), vol. 21, no. 1, 2000, pp. 16-9.
Jeanneret C, Labs KH, Aschwanden M, et al. [Venous cross-sectional area: measured or calculated?]. Ultraschall Med. 2000;21(1):16-9.
Jeanneret, C., Labs, K. H., Aschwanden, M., Gehrig, A., & Jäger, K. A. (2000). [Venous cross-sectional area: measured or calculated?]. Ultraschall in Der Medizin (Stuttgart, Germany : 1980), 21(1), 16-9.
Jeanneret C, et al. [Venous Cross-sectional Area: Measured or Calculated?]. Ultraschall Med. 2000;21(1):16-9. PubMed PMID: 10746279.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Venous cross-sectional area: measured or calculated?]. AU - Jeanneret,C, AU - Labs,K H, AU - Aschwanden,M, AU - Gehrig,A, AU - Jäger,K A, PY - 2000/4/4/pubmed PY - 2000/5/8/medline PY - 2000/4/4/entrez SP - 16 EP - 9 JF - Ultraschall in der Medizin (Stuttgart, Germany : 1980) JO - Ultraschall Med VL - 21 IS - 1 N2 - AIM: The aim of this study was to compare measured versus calculated venous cross-sectional area in healthy subjects in a standing and a lying position with normal breath-ing and during Valsalva manoeuvre. METHOD: Measurements were carried out in 30 venous segments (the common femoral vein CFV, the superficial femoral vein SFV, the greater saphenous vein GSV) of 5 healthy volunteers (4 female, 1 male) with a median age of 28.7 years (range 23.4-46.7 years) in supine and standing position, while normally breathing and during a standardised Valsalva manoeuvre. Venous diameters were measured from B-mode in longitudinal view while cross-sectional areas were planimetrically assessed from transverse B-mode as recorded on video (S-VHS). The mathematical calculation of areas followed the formula (0.5 diameter)2 x pi. All investigations were performed 3 times; mean values from these 3 measurements were used for further computation. Measurements were performed using the NIH Image 1.6 program. RESULTS: Correlation coefficients r of the calculated versus the measured venous area while normal breathing in standing and in lying subjects were: 0.92 and 0.82 in the CFV, 0.92 and 0.84 in the SFV as well as 0.98 and 0.97 in the GSV, respectively. During Valsalva manoeuvre in standing and lying subjects the correlation coefficients r amounted to: 0.94 and 0.93 in the CFV, 0.92 and 0.94 in the SFV as well as 0.99 and 0.98 in the GSV, respectively. CONCLUSIONS: In healthy volunteers measured and calculated venous cross-sectional area at rest and during Valsalva manoeuvre correlate well. Correlation is numerically better in standing compared to lying subjects while normal breathing. Calculated venous area is accurate and can be used for further calculations. SN - 0172-4614 UR - https://www.unboundmedicine.com/medline/citation/10746279/[Venous_cross_sectional_area:_measured_or_calculated]_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2000-8925 DB - PRIME DP - Unbound Medicine ER -