text: OBSERVATIONS: , The forced vital capacity is 2.84 L and forced expiratory volume in 1 second is 1.93 L. The ratio between the two is 68%.  Small improvement is noted in the airflows after bronchodilator therapy.  Lung volumes are increased with a residual volume of 196% of predicted and total lung capacity of 142% of predicted.  Single-breath diffusing capacity is slightly reduced.,IMPRESSION: , Mild-to-moderate obstructive ventilatory impairment.  Some improvement in the airflows after bronchodilator therapy.cardiovascular / pulmonary, lung volume, forced expiratory volume, forced vital capacity, airflows, total lung capacity, bronchodilator therapy, bronchodilatorNOTE,: Thesetranscribed medical transcription sample reports and examples are provided by various users andare for reference purpose only. MTHelpLine does not certify accuracy and quality of sample reports.These transcribed medical transcription sample reports may include some uncommon or unusual formats;this would be due to the preference of the dictating physician. All names and dates have beenchanged (or removed) to keep confidentiality. Any resemblance of any type of name or date orplace or anything else to real world is purely incidental.,