Critical Care and Postoperative Management of the First Human Long Segment Orthotopic Tracheal Transplantation.

To outline the postoperative management of a long segment tracheal transplant in the ICU setting. DESIGN: The recipient required reconstruction of a long segment tracheal defect from a previous prolonged intubation. A male donor was chosen for a female recipient to enable analysis of the reepithelialization kinetics using fluorescence in situ hybridization to analyze the source of the new ciliated epithelium. SETTING: Transplant ICU at the Mount Sinai Hospital, New York, NY. PATIENTS: The female recipient was previously intubated for an asthma exacerbation and subsequently developed long segment tracheal stenosis and failed conventional management including dilatation, stenting, and six major surgical procedures rendering her chronically tracheostomy-dependent. The male donor suffered a massive subarachnoid hemorrhage and was subsequently pronounced brain dead. Organ procurement occurred after obtaining appropriate consent from the patient's family. INTERVENTIONS: The patient received a deceased donor tracheal allograft that included the thyroid gland, parathyroid glands, and the muscularis of the cervical and thoracic esophagus. Triple therapy immunosuppression (tacrolimus, mycophenolate mofetil, and a corticosteroid taper) was maintained. MEASUREMENTS AND MAIN RESULTS: The patient was initially managed postoperatively with deep sedation on ventilator via armored/reinforced endotracheal tube placed through a small tracheostomy located along the superior tracheal anastomosis. Serial bronchoscopies were performed for graft assessment, pulmonary toilet, and biopsies, which initially showed acute inflammatory changes but no features of acute allograft rejection. A euthyroid state was maintained but hypercalcemia developed. CONCLUSIONS: The ICU management of this first long segment orthotopic tracheal transplant required a multidisciplinary approach involving critical care, otolaryngology, transplant surgery, interventional pulmonary, endocrinology, 1:1 nursing throughout the recipient's transplant ICU stay, and respiratory therapy that resulted in the successful establishment of a viable tracheal airway and heralded the end of chronic tracheostomy dependence.

Feasibility, Utility, and Safety of Midodrine During Recovery Phase From Septic Shock.

BACKGROUND: We describe the feasibility, utility, and safety of oral midodrine to replace IV vasopressors during recovery from septic shock. METHODS: This was a retrospective study performed in a medical ICU. All study subjects had a diagnosis of septic shock requiring at least 24 hours of IV vasopressors and demonstrated clinical stability with stable or decreasing doses of IV vasopressors. The two groups compared were those who received IV vasopressors only and those who received IV vasopressors with adjunctive midodrine. RESULTS: Of the 275 study patients, 140 received an IV vasopressor only and 135 received midodrine in addition to an IV vasopressor. There was no difference between the groups' demographics (age, sex, Acute Physiology and Chronic Health Evaluation 4 score). Mean IV vasopressor duration was 3.8 days in the IV vasopressor only group and 2.9 days in the IV vasopressor with midodrine group (P < .001). An IV vasopressor was reinstituted after discontinuation in 21 of 140 (15%) patients in the IV vasopressor only group and in 7 of 135 (5.2%) patients in the IV vasopressor with midodrine group (P = .007). ICU length of stay was 9.4 days in the IV vasopressor only group and 7.5 days in the IV vasopressor with midodrine group (P = .017). There were no complications associated with midodrine use except transient bradycardia in one patient, which resolved upon discontinuation of midodrine. CONCLUSIONS: Midodrine may reduce the duration of IV vasopressors during recovery phase from septic shock and may be associated with a reduction in length of stay in the ICU.

Production of hypoxia-induced corneal edema in aged eyes.

PURPOSE: Corneal thickness assessment is a common clinical procedure applied in corneal and contact lens care. This study aims to investigate the effect of age on hypoxia-induced corneal swelling. METHODS: Eighteen male subjects were equally divided into the younger [(23.7 +/- 0.8) years old] and older [(74.4 +/- 2.5) years old] groups. Each subject wore a thick soft contact lens (uniform thickness of 0.3 mm) on the left cornea. With the contact lens in place, the baseline central corneal thickness was measured using a specially designed photo-pachometer. The lens was then patched behind the closed eyelids, producing an extremely hypoxic stress to the cornea. The change in central corneal thickness was monitored every 20 minutes with momentary disruptions to the hypoxic stress over the next 2 hours. The increase in thickness was taken as an index of corneal edema. The rate of change in corneal thickness, as derived from a non-linear mathematical model, was compared between groups. RESULTS: The corneal thickness of both age groups increased significantly with time (P < 0.0001). The mean corneal swelling constant for the older subjects was 16.5 x 10(-3) (S.E.M. = 2.65 x 10(-3)) and the value for the younger subjects was 46.5 x 10(-3) (S.E.M. = 3.25 x 10(-3)). The difference was statistically significant (P < 0.0001). CONCLUSION: Aging cornea has a slower hypoxia-induced edema response compared with the younger group. Whether it is caused by a decreased corneal lactate production or an increased resistance to physical expansion deserves further investigation.