Apical perfusion fraction as a predictor of short-term functional outcome following bilateral lung volume reduction surgery.

STUDY OBJECTIVES: To examine whether relative hypoperfusion to the apical one third of the lungs as determined by lung scintigraphy predicts a favorable functional outcome following bilateral lung volume reduction surgery (LVRS). METHODS: We performed a retrospective analysis of 128 patients who underwent bilateral LVRS. An apical perfusion fraction (AP%), defined as the percentage of total lung perfusion to the apical one third of both lungs, was derived for each patient by quantitative scintigraphy technique. Pulmonary function testing and 6-min walk test (6MWT) data were obtained preoperatively and 3 to 6 months postoperatively. RESULTS: The mean (+/- SD) improvement in FEV(1) was 309 +/- 240 mL, 209 +/- 293 mL, and 116 +/- 224 mL for patients with an AP% of 20%, respectively (p = 0.01, analysis of variance [ANOVA]). The likelihood of experiencing an increase in FEV(1) >or= 200 mL was 68% for those with an AP% 20%. Preoperative and postoperative 6MWT data were available for 109 of 128 patients. Improvement was 250 +/- 252 feet, 205 +/- 299 feet, and 77 +/- 200 feet for patients with AP% 20%, respectively (p = 0.04, ANOVA). While 50% of those with an AP% or= 180 feet, only 21% of those with an AP% > 20% did so. CONCLUSION: This retrospective analysis suggests that quantification of apical perfusion by nuclear scintigraphy assists in predicting the likelihood of short-term functional improvement after LVRS.

Dynamic observation of pulmonary perfusion using continuous arterial spin-labeling in a pig model.

The continuous arterial spin-labeling (CASL) method of perfusion MRI is used to observe pulmonary perfusion dynamically in an animal model. Specifically, a respiratory-triggered implementation of the CASL method is used with approximate spatial resolution of 0.9 x 1.8 x 5.0 mm (0.008 cc) and 2-minute temporal resolution. Perfusion MRI is performed dynamically during repeated balloon occlusion of a segmental pulmonary artery, as well as during pharmacological stimulation. A total of three Yorkshire pigs were studied. The results demonstrate the ability of the endogenous spin-labeling method to characterize the dynamic changes in pulmonary perfusion that occur during important physiological alterations.

Detection and localization of pulmonary air leaks using laser-polarized (3)He MRI.

Pulmonary air leaks were created in the lungs of Yorkshire pigs. Dynamic, 3D MRI of laser-polarized (3)He gas was then performed using a gradient-echo pulse sequence. Coronal magnitude images of the helium distribution were acquired during gas inhalation with a voxel resolution of approximately 1.2 x 2.5 x 8 mm, and a time resolution of 5 sec. In each animal, the ventilation images reveal focal high-signal intensity within the pleural cavity at the site of the air leaks. In addition, a wedge-shaped region of increased parenchymal signal intensity was observed adjacent to the site of the air leak in one animal. (3)He MRI may prove helpful in the management of patients with pulmonary air leaks.

Termination of life support after major trauma.

As the population continues to age, greater numbers and more severely injured elderly patients require care in ICUs. With the attendant increase in the medical complexity of such patients, investigators anticipate that trauma and critical care resources will become increasingly stretched. Because of economic and societal forces, it will become increasingly important for trauma surgeons to appropriately counsel patients and their families regarding the outcome from their injuries and to become comfortable approaching families about withdrawal of support when medical futility is recognized. The authors propose the following guidelines for discussing limitation or termination of life support with patients and their families. Physicians should (1) discuss the patient's wishes regarding life support on admission or early in the hospital course; (2) at the initial discussion, establish who the decision maker will be if the patient is or becomes incapacitated; (3) maintain regular communication and continuity of care; and (4) inevitably, when conflict occurs, involve consultants and a hospital ethics committee for assistance in its resolution.

A comprehensive educational program improves clinical outcome measures in inner-city patients with asthma.

BACKGROUND: Despite improved understanding of the pathophysiology of asthma, morbidity and mortality continue to rise, with disproportionate increases occurring among urban, indigent minorities. New approaches in the management of asthma are therefore necessary to reverse these dramatic and costly trends. OBJECTIVE: To determine if patients who are admitted to the hospital with acute asthma and receive inpatient education will have improved outpatient follow-up and clinical outcome measures compared with those receiving conventional care. METHODS: Patients enrolled in the study had a primary admission diagnosis of asthma and were between ages 18 and 45 years. Exclusion criteria included comorbid disease, inability to speak English, absence of a telephone in the primary residence, or pregnancy. Seventy-seven patients admitted from the emergency department with asthma were randomized to either the inpatient educational program (IEP) or routine care (control group). Patients in the IEP received asthma education, bedside spirometry, a telephone call 24 hours after discharge, and scheduled follow-up in an outpatient asthma program within 1 week of discharge. Those individuals randomized to the routine management group received conventional inpatient asthma care and routine follow-up. RESULTS: The patients enrolled in the IEP had a markedly higher follow-up rate compared with outpatient appointments (60% vs. 27%; P = .01) and significantly fewer emergency department visits (P = .04) and hospitalizations (P = .04) for asthma in the 6 months following IEP intervention, as compared with control patients. This represented a substantial cost savings to the managed care organization. CONCLUSION: Our study suggests that an IEP in the treatment of indigent, inner-city patients hospitalized with asthma reduces the need for subsequent emergent care and improves outpatient follow-up in a cost-effective manner.

Do patients want physicians to inquire about their spiritual or religious beliefs if they become gravely ill?

BACKGROUND: Recognizing that many Americans draw on religious or spiritual beliefs when confronted by serious illness, some medical educators have recommended that physicians routinely ask about spirituality or religion when conducting a medical history. The most appropriate wording for such an inquiry remains unknown. OBJECTIVE: To examine patient acceptance of including the following question in the medical history of ambulatory outpatients: "Do you have spiritual or religious beliefs that would influence your medical decisions if you become gravely ill?" METHODS: Self-administered questionnaires were completed by 177 ambulatory adult patients visiting a pulmonary faculty office practice at a university teaching hospital in 1997 (83% response rate). RESULTS: Fifty-one percent of the study patients described themselves as religious and 90% believe that prayer may sometimes influence recovery from an illness. Forty-five percent reported that religious beliefs would influence their medical decisions if they become gravely ill. Ninety-four percent of individuals with such beliefs agreed or strongly agreed that physicians should ask them whether they have such beliefs if they become gravely ill. Forty-five percent of the respondents who denied having such beliefs also agreed that physicians should ask about them. Altogether, two thirds of the respondents indicated that they would welcome the study question in a medical history, whereas 16% reported that they would not. Only 15% of the study group recalled having been asked whether spiritual or religious beliefs would influence their medical decisions. CONCLUSION: Many but not all patients surveyed in a pulmonary outpatient practice welcome a carefully worded inquiry about their spiritual or religious beliefs in the event that they become gravely ill.

Allegations of sexual abuse in an intensive care unit.

OBJECTIVES: To describe misperceptions of sexual abuse by critically ill, sedated patients undergoing routine perineal care in an intensive care unit and to offer suggestions for addressing patient allegations of sexual mistreatment in this setting. DESIGN: Case reports and discussion. SETTING: Intermediate care unit extension of a medical intensive care unit at a university teaching hospital. PATIENTS: A 57-yr-old man who misperceived rectal intubation as sexual assault while receiving intravenous lorazepam for sedation; a 31-yr-old woman who misinterpreted a perineal bed bath as sexual abuse while receiving lorazepam and fentanyl. INTERVENTIONS: None. CONCLUSIONS: Under the influence of commonly used psychotropic drugs, some acutely ill, hospitalized patients misperceive routine perineal care as sexual abuse. Because the care that gives rise to mistaken allegations of sexual misconduct is often given in private, and because sexual abuse of patients sometimes actually occurs in hospitals, institutional investigation of these complaints is both sensitive and difficult. Some inpatient allegations of sexual abuse may not be resolvable by any means. Awareness of the potential for misinterpretation of perineal care may help prevent this disturbing phenomenon and promote fair, reasoned investigation when patient complaints of sexual abuse do arise in acute care hospitals.

Comparison of short-term functional outcomes following unilateral and bilateral lung volume reduction surgery.

STUDY OBJECTIVES: To compare short-term functional outcomes following unilateral and bilateral lung volume reduction surgery (LVRS) performed in patients with advanced emphysema. METHODS: LVRS was performed unilaterally in 32 patients and bilaterally in 119 patients. Pulmonary function testing and 6-min walk test (6MWT) were performed preoperatively and repeated at 3 to 6 months postoperatively. RESULTS: Bilateral LVRS was associated with increased in-hospital mortality (10% vs 0%, p<0.05) and a higher incidence of postoperative respiratory failure (12.6% vs 0%; p<0.05) compared with unilateral LVRS. There was no significant difference in duration of air leaks between unilateral and bilateral groups, but the mean hospital stay was significantly longer following bilateral LVRS (21.1+/-32.0 days vs 14.2+/-14.0 days; p<0.05). Preoperatively, there was no significant difference between the unilateral and bilateral groups with respect to FEV1, FVC, residual volume, or 6MWT distance. However, for all of these parameters, the magnitude of improvement was significantly greater following bilateral LVRS. Notably, the magnitude of improvement in each parameter following unilateral LVRS exceeded half that following bilateral LVRS, suggesting that functional outcomes after the unilateral procedure were disproportionate to the amount of tissue resected. Serial functional assessment of seven patients undergoing staged unilateral procedures (two unilateral procedures separated in time by at least 3 months) demonstrated somewhat unpredictable responses; failure to achieve a favorable response to the initial procedure did not necessarily portend a similar outcome with the contralateral side, and vise versa. CONCLUSIONS: Bilateral LVRS produces a greater magnitude of short-term functional improvement than does the unilateral procedure and should be considered the procedure of choice for most patients. Unilateral LVRS should be reserved for patients in whom factors contraindicating entrance into one hemithorax exist.

Anxiety and depression in advanced lung disease.

Anxiety, panic, and depression commonly complicate chronic airflow obstruction, and probably other forms of advanced lung disease as well. Despite the recent development of many new therapeutic options, these conditions remain under-recognized and under-treated in this patient population. Under-diagnosis may result in part from the challenge of distinguishing between the somatic manifestations of psychiatric disease and the physical symptoms of severe respiratory dysfunction. Treatment relies on judicious pharmacotherapy and appropriate psychologic support. Serotonin selective reuptake inhibitors are particularly useful in the treatment of depression and panic, and may be helpful in controlling other forms of anxiety, as well. Cognitive behavioral therapy is an important adjunct in the management of anxiety. Electroconvulsive therapy should be considered for selected lung disease patients with refractory depression.

Advanced lung disease. Palliation and terminal care.

Considering that lung disease is the fourth leading cause of death in the United States, remarkably little has been written about palliative care for patients who die of respiratory disease. Because most such deaths are anticipated, palliative care should begin with advance medical planning, ideally in the form of a prescheduled meeting among the physician, the patient, and the patient's proxy for health affairs. Home hospice care should be considered when a patient with progressive lung disease is largely confined to the bedroom because of dyspnea. Medical attention during the terminal phase of a respiratory illness should focus on the experience of the patient. Common symptoms amenable to counseling and pharmacotherapy include dyspnea, pain, anxiety, insomnia, and depression. If initiated to no benefit, mechanical ventilation can be terminally withdrawn with the concurrence of the patient or family. The withdrawal process should be family centered, and followed by continued supportive care until the patient dies.

Bilateral lung volume reduction surgery for advanced emphysema. A comparison of median sternotomy and thoracoscopic approaches.

STUDY OBJECTIVES: To compare short-term outcomes following bilateral lung volume reduction surgery performed by median sternotomy (MS) and video-assisted thoracoscopic surgery (VATS). METHODS: Bilateral lung volume reduction surgery was performed by MS in 80 patients and by VATS in 40. All patients underwent preoperative assessment with pulmonary function testing, arterial blood gas determination, and 6-min walk test (6MWT). Pulmonary function testing and 6MWT were repeated at 3 to 6 months postoperatively. RESULTS: The mean age of the VATS group was lower than that of the MS group (59.3 +/- 9.4 vs 62.4 +/- 6.9 years; p = 0.001), but there were no differences in baseline functional parameters of disease severity (FEV1, FVC, residual volume [RV], arterial PCO2, or 6MWT). All patients in both groups were extubated at the completion of surgery, but 17.5% of patients in the MS group and 2.5% in the VATS group (p = 0.02) subsequently required reintubation at some point during the postoperative course. Thirty-day operative mortality was 4.2% for the MS group and 2.5% for the VATS group (p = not significant). However, total in-hospital mortality was 13.8% for the MS group, while it remained 2.5% for the VATS group (p = 0.05). Mortality was largely confined to patients 65 years of age or older. There was no significant difference in duration of air leaks or length of hospital stay between the two groups. Functional outcomes achieved with the two techniques were similar. Specifically, there was no difference between the two groups in mean postoperative FEV1, FVC, RV, or 6MWT, or in the magnitude of change in these parameters over preoperative values. CONCLUSIONS: Bilateral lung volume reduction surgery performed by either MS and VATS approaches leads to similar improvements in pulmonary function and exercise tolerance. VATS is associated with a significantly lower incidence of respiratory failure and a trend toward decreased in-hospital mortality and may be the preferred technique, particularly for high-risk patients.

Decisions to limit or continue life-sustaining treatment by critical care physicians in the United States: conflicts between physicians' practices and patients' wishes.

We surveyed a national sample of 879 physicians practicing in adult intensive care units in the United States, in order to determine their practices with regard to limiting life-sustaining medical treatment, and particularly their decisions to continue or forgo life support without the consent or against the wishes of patients or surrogates. Virtually all of the respondents (96%) have withheld and withdrawn life-sustaining medical treatment on the expectation of a patient's death, and most do so frequently in the course of a year. Many physicians continue life-sustaining treatment despite patient or surrogate wishes that it be discontinued (34%), and many unilaterally withhold (83%) or withdraw (82%) life-sustaining treatment that they judge to be futile. Some of these decisions are made without the knowledge or consent of patients or their surrogates, and some are made over their objections. We conclude that physicians do not reflexively accept requests by patients or surrogates to limit or continue life-sustaining treatment, but place these requests alongside a collection of other factors, including assessments of prognosis and perceptions of other ethical, legal, and policy guidelines. While debate continues about the ethical and legal foundations of medical futility, our results suggest that most critical care physicians are incorporating some concept of medical futility into decision making at the bedside.

Improving patient tolerance of mechanical ventilation. Challenges ahead.

The development of psychopharmacology and anesthesia practice in the ICU has lagged well behind the development of similar practices in other settings, notably the operating room. Because of important differences in the severity of organ dysfunction and the duration of treatment, however, lessons learned in other settings cannot be applied directly to the ICU. A fresh conceptual framework is needed to identify indications for sedating drugs and muscle relaxants in the ICU. New assessment tools are needed, both for clinical research and for clinical practice. More information is needed on the pharmacokinetics, adverse effects, and comparative costs of psychoactive drug use in the ICU. Practice guidelines are needed to improve efficacy and reduce errors associated with these drugs. The challenge is considerable. The reward is a more humane ICU experience for critically ill patients.