Normal values of functional residual capacity in the sitting and supine positions

Ibañez, J.; Raurich, J. M.

doi:10.1007/bf01725734

Cited by 103 publications

(69 citation statements)

References 20 publications

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“…Although TLC measured with CT is correlated with that measured by plethysmography (which itself is correlated with height), stepwise increases in variance from one correlation to another results in weaker correlations between CT indexes and height than between CT indexes and TLC measured with CT. 13,21 The difference of 14% found between TLC in the sitting and supine positions is compatible with previously described change in functional residual capacity and in VC. 22,23 Measuring TLC with CT has the major advantage of using the same supine position as is used when calculating CT indexes vs the seated position used at plethysmography. CT indexes should, therefore, be adjusted for TLC measured with CT rather than for height.…”

Section: Discussionmentioning

confidence: 99%

Effect of total lung capacity and gender on CT densitometry indexes

Walsdorff

Muylem

Gevenois

2016

BJR

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Objective: Testing the hypothesis that CT densitometry indexes could be influenced by total lung capacity (TLC), gender and height in normal individuals. Methods: In this ethics committee-approved prospective study, 100 healthy non-smoking volunteers who provided written informed consent were included. From a helical scan of the chest, the relative area (RA) of the lung with attenuation coefficients lower than 2960 HU and the 1st and 15th percentiles of the distribution of attenuation coefficients were calculated. Regression lines were drawn between each CT index and volunteers' height and total TLC at CT. Results: In males, there was no statistically significant correlation between any CT index and height. In females, there was a statistically significant correlation between the RA of the lung with attenuation coefficients lower than 2960 HU and the 1st percentile and height but not with the 15th percentile. For both genders, there were significant correlations between all CT indexes and TLC. The relationships between CT indexes and TLC were different in males and females. Conclusion: CT indexes are correlated with TLC and height but more closely with TLC than with height, and differently in males and females. Advances in knowledge: CT indexes are influenced by TLC, gender and height in normal individuals and are more closely correlated with TLC than with height. The relationships between CT indexes and TLC or height are different in males and females. CT indexes used to quantify emphysema should thus be adjusted according to TLC and gender.

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Section: Discussionmentioning

confidence: 99%

Effect of total lung capacity and gender on CT densitometry indexes

Walsdorff

Muylem

Gevenois

2016

BJR

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“…Using the predictive equation of Ibanez and Raurich [15], our preoperative FRC values ranged from 57.9 to 195.6% of pre dicted. Subject SS suffered of emphysema.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the Effect of Continuous Positive Airway Pressure and Blowing Bottles on Functional Residual Capacity after Abdominal Surgery

Heitz¹,

Holzach

Dittmann

1985

Respiration

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In two groups of comparable patients undergoing elective abdominal surgery, functional residual capacity (FRC) was measured preoperatively and on the first 2 days after surgery. One group was treated by regular application of continuous positive airway pressure (CPAP), the other group by bottle blowing (BB). In both groups there was a significant reduction of FRC on the first postoperative day. BB and CPAP increased FRC preoperatively by approximately 50%. Postoperative CPAP or BB increased FRC towards the preoperative value. However, 10 min after the treatment was stopped, FRC was not different from the pretreatment level. In 4 healthy subjects the resistive work of breathing produced by CPAP or BB was measured. Both treatments increased mainly expiratory and total resistive work of breathing. BB resulted in especially high expiratory and total resistive work. It is concluded that CPAP and BB increase temporarily the reduced FRC after abdominal surgery. CPAP was much better tolerated by the patients due to the lower resistive work of breathing.

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“…The NCAT software was used to generate a phantom with a lung volume corresponding to a 65-year-old male (70 kg, 180 cm) in a supine position and in the middle of the respiratory cycle (Ibanez and Raurich, 1982;Quanjer et al, 1993). The respiratory motion and heartbeat of the phantom were employed throughout the study, i.e.…”

Section: Methodsmentioning

confidence: 99%

Quantification and optimisation of lung ventilation SPECT images

Norberg¹

2014

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Normal values of functional residual capacity in the sitting and supine positions

Cited by 103 publications

References 20 publications

Effect of total lung capacity and gender on CT densitometry indexes

Effect of total lung capacity and gender on CT densitometry indexes

Comparison of the Effect of Continuous Positive Airway Pressure and Blowing Bottles on Functional Residual Capacity after Abdominal Surgery

Quantification and optimisation of lung ventilation SPECT images

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