scholarly journals P1‐4: Computed tomographic volumetry in the diagnosis of lung inflation disorders in patients with pulmonary‐mediastinal sarcoidosis

Respirology ◽  
2021 ◽  
Vol 26 (S3) ◽  
pp. 70-71
Keyword(s):  
Lung Inflation ◽  
Computed Tomographic

Effect of body orientation on regional lung expansion: a computed tomographic approach

1985 ◽  
Vol 59 (2) ◽  
pp. 468-480 ◽  
Author(s):  
E. A. Hoffman
Keyword(s):  
Gravitational Effect ◽  
Body Posture ◽  
Lung Inflation ◽  
Computed Tomographic ◽  
Air Content ◽  
Lung Expansion ◽  
Regional Lung ◽  
Residual Capacity ◽  
Potato Flakes

The Dynamic Spatial Reconstructor (DSR) was used to study in vivo lung geometry and function. By replacing the lungs of three dogs with potato flakes and ping-pong balls of known air content and scanning these realistic phantoms in the DSR we have estimated accuracy of lung density to be within 7% and have demonstrated a high (+/- 3%) internal consistency (relative density within dogs). Change in total lung air content (y) as calculated from DSR volume imaging of anesthetized dogs matched the known inflation steps (x) to within 7% [range was 1–7% with a mean of 3 +/- 0.5% (SE)]. A gradient of decreasing percent lung air content was measured in the ventral-dorsal direction at functional residual capacity (FRC) in the supine body posture (y = 3.29% air content/cm lung height + 46.48% air content; r = 0.90). Regional lung air content change with lung inflation was greatest in the dependent lung regions. In contrast, regional lung air content at FRC was approximately uniform along the ventral-dorsal direction with the dog in the prone posture and was 66 +/- 0.6% (SE). Ventral-dorsal gradients in lung air content measured within an isogravimetric plane of the dogs in the left or right lateral body posture suggest that regional differences in lung air content cannot be explained solely on the basis of a direct gravitational effect on the lung. Evidence is presented to suggest a possible major role of the intrathoracic position of the mediastinal contents in determining these lung air content distributions.

Asymmetrical action of the canine diaphragm after single-lung inflation

2011 ◽  
Vol 110 (6) ◽  
pp. 1519-1525 ◽  
Author(s):  
André De Troyer ◽  
Dimitri Leduc ◽  
Pierre Alain Gevenois ◽  
Matteo Cappello
Keyword(s):  
Radius Of Curvature ◽  
Lung Inflation ◽  
Endotracheal Tubes ◽  
Computed Tomographic ◽  
Airway Opening ◽  
Anesthetized Dogs ◽  
Radiopaque Markers ◽  
Phrenic Nerves ◽  
The Right ◽  
Phrenic Stimulation

Single-lung transplantation (SLT) in patients with emphysema leads to a cranial displacement of the diaphragm on the transplanted side and a shift of the mediastinum toward the transplanted lung. The objective of the present study was to assess the effect of unilateral lung inflation on the mechanics of the diaphragm. Two endotracheal tubes were inserted in the two main stem bronchi of six anesthetized dogs, and radiopaque markers were attached along muscle fibers in the midcostal region of the two halves of the diaphragm. The animals were then placed in a computed tomographic scanner, the left or the right lung was passively inflated, and the phrenic nerves were stimulated while the two endobronchial tubes were occluded. As lung volume increased, the fall in airway opening pressure (ΔPao) in the inflated lung during stimulation decreased markedly, whereas ΔPao in the noninflated lung decreased only moderately ( P < 0.001). Also, the two hemidiaphragms shortened both during relaxation and during phrenic stimulation, but the ipsilateral hemidiaphragm was consistently shorter than the contralateral hemidiaphragm. In addition, the radius of curvature of the ipsilateral hemidiaphragm during stimulation increased, whereas the radius of the contralateral hemidiaphragm remained unchanged. These observations indicate that 1) in the presence of unilateral lung inflation, the respiratory action of the diaphragm is asymmetric; and 2) this asymmetry is primarily determined by the differential effect of inflation on the length and curvature of the two halves of the muscle. These observations also imply that in patients with emphysema, SLT improves the action of the diaphragm on the transplanted side.

Lumbar lateral canal entrapment: Clinical, radiculographic and computed tomographic findings

1988 ◽  
Vol 39 (1) ◽  
pp. 144-149 ◽  
Author(s):  
I STOCKLEY ◽  
C GETTY ◽  
A DIXON ◽  
I GLAVES ◽  
H EUINTON ◽  
...  
Keyword(s):  
Computed Tomographic ◽  
Lateral Canal

Diagnostic workup and endovascular treatment of popliteal artery trauma

VASA ◽  
2019 ◽  
Vol 48 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Cheong J. Lee ◽  
Rory Loo ◽  
Max V. Wohlauer ◽  
Parag J. Patel
Keyword(s):  
Vascular Injury ◽  
Gold Standard ◽  
Imaging Techniques ◽  
Computed Tomographic Angiography ◽  
Vascular Trauma ◽  
Endovascular Techniques ◽  
Computed Tomographic ◽  
Arterial Injuries ◽  
Arterial Trauma ◽  
Peripheral Arterial

Abstract. Although management paradigms for certain arterial trauma, such as aortic injuries, have moved towards an endovascular approach, the application of endovascular techniques for the treatment of peripheral arterial injuries continues to be debated. In the realm of peripheral vascular trauma, popliteal arterial injuries remain a devastating condition with significant rates of limb loss. Expedient management is essential and surgical revascularization has been the gold standard. Initial clinical assessment of vascular injury is aided by readily available imaging techniques such as duplex ultrasonography and high resolution computed tomographic angiography. Conventional catheter based angiography, however, remain the gold standard in the determination of vascular injury. There are limited data examining the outcomes of endovascular techniques to address popliteal arterial injuries. In this review, we examine the imaging modalities and current approaches and data regarding endovascular techniques for the management popliteal arterial trauma.

Analysis of air contrast barium enema, computed tomographic colonography, and colonoscopy: prospective comparison

The Lancet ◽  
2005 ◽  
Vol 365 (9456) ◽  
pp. 305-311 ◽  
Author(s):  
D ROCKEY ◽  
E PAULSON ◽  
D NIEDZWIECKI ◽  
W DAVIS ◽  
H BOSWORTH ◽  
...  
Keyword(s):  
Barium Enema ◽  
Computed Tomographic Colonography ◽  
Computed Tomographic ◽  
Prospective Comparison

Use of the eSVS mesh during CABG: Computed tomographic evaluation after 6 months

2014 ◽  
Vol 62 (S 01) ◽  
Author(s):  
T. Attmann ◽  
C. Grothusen ◽  
A. Reinsdorf ◽  
J. Schöttler ◽  
A. Haneya ◽  
...  
Keyword(s):  
Computed Tomographic
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