Van Belle et al. [23] Respiratory Medicine, 1992 | Postoperative pulmonary functions abnormalities after coronary artery by-pass surgery | Assess the effects of MRS on lung function after 1 and 6 weeks of PO | n = 34 Those who underwent MRS Preoperatively assessed, 1 week and 6 weeks of PO | 6 weeks = significant persistence of reduction in TPC, FEV1, and TV in relation to preoperative values |
Efthimiou et al. [29] Annals Thoracic Surgery, 1991 | Diaphragm paralysis following cardiac surgery: role of phrenic nerve cold injury | Compare the frequency and natural history of diaphragmatic paralysis in patients who underwent CS with or without “ice/slush”* | n = 100 Those who underwent MRS Group I (n = 50)—with “ice-slush”*, Group II (n = 50)—without “ice-slush”* Assessed by X-ray, 1 week, 1 month, and every 6 months of PO | 1 month = 12 patients in Group I had diaphragmatic paralysis 1 year = 5 patients in Group I had diaphragmatic paralysis |
Landymore et al. [31] European Journal of Cardio-thoracic Surgery, 1990 | Pulmonary complications following myocardial revascularization with de internal mammary artery graft | Determine the incidence and etiology of pulmonary complications after MRS with IMA graft | n = 106 Those who underwent MRS and valve surgery Group I (control)— saphenous graft, Group II—IMA with pleural dissection Group III—IMA without pleural dissection Assessed with 3 months of PO, by X-ray | 3 months = 53% of Group II patients had persistent loss of left lung volume related to atelectasis and left pleural effusion |
Shapira et al. [20] Annals Thoracic Surgery, 1990 | Determinants of pulmonary functions in patients undergoing coronary bypass operations | Determine the immediate and late effect of median sternotomy on lung function | n = 29 Those who underwent MRS Preoperatively assessed, at hospital discharge, and 3 months of PO | 3 months = some minor reductions were found for IC, TPC, FEV1, FEF 25% - 75%, PEF, FVC, and SVC |
Curtis et al. [30] The Annals of Thoracic Surgery, 1989 | Elevated hemidiaphragm after cardiac operations: incidence, prognosis, and relationship to the use of topical ice slush | Determine the incidence and prognosis of elevated hemidiaphragm in patients who underwent CS with “ice/slush”* | n = 745 Those who underwent MRS with “ice-slush”* Preoperatively assessed, 1 month, and 1 year of PO | 1 month = 79 out of 99 patients (79.8%) had diaphragmatic elevation 1 year = 14 out of 64 patients (21.9%) had diaphragmatic elevation |
Braun et al. [18] Chest, 1978 | Pre and postoperative pulmonary function abnormalities in coronary artery revascularization surgery | Assess the preoperative pulmonary status and late PO of patients who underwent MRS | n = 19 Those who underwent MRS Preoperatively assessed, 1 to 2 days, 2 weeks and mean 116 days of PO | 116 days = reduced VC, TPC, IC, FRC and diffusion capacity |