Title
Correlation of Chest radiography with Pulmonary Functional status & Exercise
capacity in pneumoconiosis patients according to ILO classification
Aims
To assess the correlation of Chest radiography with pulmonary functional status
and exercise capacity by 6MWT in pneumoconiosis patients according to ILO
guidelines
Material & Methods-A descriptive study conducted at Dr SN medical college
Jodhpur, India from july 2013 to august 2014. Total 109 patients were selected
on the basis of history of exposure to silica, chest x-ray was used to confirm the
diagnosis of silicosis and to classify them according to ILO guidelines.
Spirometry & 6MWT was performed by each patient. Pearson chi-square test &
welch ANOVA was used for statistical analysis.
Results- FEV1/FVC ratio, FEV1, FVC of patients with grade 1/0 & 1/1 of Xray was 97.15±7.1, 91.15±8.9%, 93.3±6.4% respectively & these parameters
were within normal limits & these spirometric variables gradually decreased
with increasing ILO grading of Chest X-ray & decreased to 62.5±22.6,
36.25±14.2% & 60±18.42% respectively in grade C of chest X-ray of PMF
patients, all these change in parameters were highly significant(p<0.001).The
6MWD ,Spo2 desaturation & BORG dyspnea scale during 6MWT in patients
with grade 1/0 &1/1 was 439±36.7m, 1.03±0.82% & 0.54±0.66 respectively and
changed gradually with advancing ILO grading of silicosis to 251.25±12.84m,
9.75±1.5% & 5.5±1 respectively in grade C of ILO with a difference in 6MWD
of 188m, Spo2 desaturation of 8.72% & BORG dyspnea scale of 4.96, these
changes were statistically significant (p<0.001).Spirometry & 6MWT
parameters mainly FVC, 6MWD & Spo2 desaturation were significantly altered
in patients with PMF compared to simple silicosis according to ILO.
ConclusionChest X-ray grading according to ILO classification correlate well with
Pulmonary functional status measured by spirometry and Exercise capacity
measured by 6MWT.Both Spirometry & 6MWT are simple, non-invasive but
highly useful in screening & also to assess the severity of silicosis.
Authors:
1st-Harishkiran N Elukoti, Department of Radiology, Goa medical college,
Bambolim, Goa, India
2nd-Deepak U G, Department of pulmonary medicine, Dr S N medical college,
Jodhpur, Rajastan, India
Twitter: harish elukoti