Withdrawal of life sustaining treatment in children in the first year of life.

OBJECTIVE: Since the enactment of the Texas Advance Directives Act of 1999, the Memorial Hermann Hospital Medical Appropriateness Review Committee (MARC) MARC reviewed six cases of children in the first year of life, three from the Neonatal ICU and three from the Pediatric ICU. We aimed to describe the characteristics of these patients and the role of the MARC in this process. STUDY DESIGN: A single reviewer retrospectively reviewed the cases for patient diagnoses, demographics, related ethical issues and the actions of the MARC. RESULT: Each of the six patients required life-sustaining therapy, and each patient had a Do Not Resuscitate order on the chart. The MARC determined that it would be appropriate to withdraw life-sustaining support in four of the cases and to continue support in two of the cases. Five of the patients died in the hospital before discharge: two after discontinuation of support, one during the 10-day waiting period, and two died on full support after the Committee determined that continued treatment was medically appropriate. One patient was transferred to another hospital during the 10-day waiting period. CONCLUSION: These cases document the application of the TADA/MARC process in infants, even in circumstances where care was withdrawn without concurrence of the family. We found the MARC process to demand a very high degree of certainty of diagnosis and prognosis to determine continuation of care to be inappropriate. We conclude that the MARC promoted communication and provided additional protections to patients, families, physicians and staff.

Sleep disorders associated with traumatic brain injury.

OBJECTIVES: To investigate the frequency of sleep disorders in traumatic brain injury (TBI) patients with hypersomnia and to discern the relationship between posttraumatic sleep disorders and pretraumatic sleep symptoms. DESIGN: Prospective cohort study using the criterion standard to diagnose sleep disorders in a consecutive sample of TBI patients. SETTING: Academic medical center with level I trauma center, rehabilitative medicine services, and accredited sleep disorders center. PATIENTS: Ten TBI patients with subjective excessive sleepiness. INTERVENTION: Nocturnal polysomnography followed by Multiple Sleep Latency Test. Subjects who had overt sleep apnea on the first nocturnal polysomnography had a second nocturnal polysomnography with titration of nasal continuous positive airway pressure. MAIN OUTCOME MEASURES: Diagnosis of sleep-disordered breathing, narcolepsy, and posttraumatic hypersomnia. RESULTS: A diagnosis of treatable sleep disorder was made in all 10 subjects. Sleep-disordered breathing was found in 7 subjects: overt obstructive sleep apnea (OSA) was diagnosed in 5 subjects, rapid eye movement-related OSA in 1, and upper airway resistance syndrome (UARS) in 1. Narcolepsy was diagnosed in 2 subjects, and the diagnosis of posttraumatic hypersomnia was made in 1 subject. Three subjects had symptoms of hypersomnia before their injury (1 each with narcolepsy, OSA, UARS), and 2 of these were driving a car at the time of injury. CONCLUSION: Treatable sleep disorders appear to be common in the sleepy TBI population, but may be largely undiagnosed and untreated.

The effect of polysomnography on sleep position: possible implications on the diagnosis of positional obstructive sleep apnea.

This prospective study was designed to determine if physical constraint due to the polysomnography (PSG) apparatus affects PSG results by inducing subjects to sleep in the supine position. Twelve patients found to have positional obstructive sleep apnea (OSA) during standard PSG returned for two additional nights of study during which no PSG leads were attached. The time spent supine was 56% greater during the PSG night than the non-PSG nights, 195 +/- 88.6 min during the baseline PSG and 125 +/- 84.6 min during the non-PSG nights (p < 0.05). Therefore, PSG may overestimate the severity of OSA in some patients with positional OSA.

Heliox therapy in acute severe asthma.

STUDY OBJECTIVE: To assess how patients with respiratory acidosis from acute severe asthma respond to helium-oxygen (heliox) mixtures. DESIGN: Consecutive case series. SETTING: Urban community teaching hospital. PATIENTS: Over a 2-year period, 12 asthmatics (mean age, 33.8 +/- 11.3 years) presented to the emergency department with acute respiratory acidosis (pH < 7.35 and PaCO2 > or = 45 mm Hg). All 12 patients were treated with heliox (60 to 70% helium/30 to 40% oxygen). Five patients received heliox through a ventilator and seven received heliox via face mask. RESULTS: Arterial blood gases (ABGs) were drawn immediately before and at a mean of 49.2 +/- 25.2 min after beginning heliox therapy. No therapeutic interventions were made between ABGs. For the entire group, the mean PaCO2 decreased from 57.9 to 47.5 mm Hg (p < 0.005) and the arterial pH increased from 7.23 to 7.32 (p < 0.001). In an attempt to find characteristics that might predict the response to heliox, a clinically significant response to heliox was defined as a drop in PaCO2 (to normal or by > or = 15%) coupled with a rise in pH by > or = 0.05. Using this definition, there were eight responders (67%) and four nonresponders (33%). The responders had a shorter duration of symptoms (17.8 vs 78.0 h, p < 0.05) and a lower preheliox pH (7.20 vs 7.30, p < 0.05). All of the responders presented within 24 h of symptom onset. Three of the four nonresponders reported prolonged (> or = 96 h) duration of symptoms, and two eventually required intubation. CONCLUSION: Heliox can rapidly improve ventilation in patients presenting to an emergency department with acute severe asthma with respiratory acidosis and a short duration of symptoms.

Alpha-delta sleep in patients with a chief complaint of chronic fatigue.

Our prospective, standardized cohort study was designed to assess the presence of alpha wave intrusions during non-rapid eye movement sleep (alpha-delta sleep) and its relationship to fibromyalgia, major depression, and chronic fatigue syndrome (CFS) in patients with a chief complaint of chronic fatigue. The study group comprised 30 consecutive patients seen at a university hospital referral clinic for evaluation of chronic fatigue. All patients had nocturnal polysomnography, dolorimetric tender point assessment for fibromyalgia, a comprehensive history, physical, and laboratory evaluation, and a structured psychiatric interview. Alpha-delta sleep was identified in 8 of the 30 patients (26%), major depression in 20 (67%), CFS in 15 (50%), and fibromyalgia in 4 (13%). Ten of the 30 patients (33%) had a primary sleep disorder (sleep apnea, periodic limb movements, or narcolepsy). Alpha-delta sleep was not significantly correlated with fibromyalgia, CFS, major depression, or primary sleep disorders, but was significantly more common among patients who had chronic fatigue without major depression. We conclude that primary sleep disorders are relatively common among patients with chronic fatigue and must be diligently sought and treated. Alpha-delta sleep is not a marker of fibromyalgia or CFS, but may contribute to the illness of nondepressed patients with these conditions.

Intensive care unit outcome in the very elderly.

OBJECTIVES: To determine if age, previous functional status, or acute severity of illness affect the acute and long-term mortality rates and functional status of the very elderly (> or = 85 yrs) after an ICU admission. DESIGN: Cohort study (retrospective entry for the first year of the study and prospective entry thereafter with prospective follow-up throughout). SETTING: An ICU in a community teaching hospital with follow-up at home or at a skilled nursing facility. PATIENTS: All (n = 105) patients > or = 85 yrs admitted to the ICU over a 2-yr period. MAIN OUTCOME MEASURES: ICU, 30-day posthospital discharge, and 1-yr mortality rates, activities of daily living scores, organ system failure score at the time of ICU admission. RESULTS: The ICU, 30-day posthospital discharge, and the 1-yr mortality rates were 30%, 43%, and 64%, respectively. Mortality rates significantly increased between the ICU stay or 30 days posthospital discharge and 1-yr follow-up periods. Of those patients who lived up to 6 months after hospital discharge, 86% survived to 1 yr with little change in functional status from baseline. In the patients with > or = 2 organ system failures, there were 88% 30-day posthospital discharge and 100% 1-yr mortality rates. Severity of illness, as measured by the number of organ system failures, was associated with increased ICU (odds ratio 3.38; 95% confidence interval, 1.51 to 7.60; p < .005) and 1 yr (odds ratio 5.76; 95% confidence interval, 2.49 to 13.29; p < .0001) mortality rates, while age within this group and preadmission functional status were not. CONCLUSIONS: Within the very elderly population, acute severity of illness is the most significant predictor of mortality after an ICU admission. For most very elderly patients, surviving 1 yr after an ICU admission, there is little change in functional status.

Recognition of distinctive patterns of gallium-67 distribution in sarcoidosis.

Assessment of gallium-67 (67Ga) uptake in the salivary and lacrimal glands and intrathoracic lymph nodes was made in 605 consecutive patients including 65 with sarcoidosis. A distinctive intrathoracic lymph node 67Ga uptake pattern, resembling the Greek letter lambda, was observed only in sarcoidosis (72%). Symmetrical lacrimal gland and parotid gland 67Ga uptake (panda appearance) was noted in 79% of sarcoidosis patients. A simultaneous lambda and panda pattern (62%) or a panda appearance with radiographic bilateral, symmetrical, hilar lymphadenopathy (6%) was present only in sarcoidosis patients. The presence of either of these patterns was particularly prevalent in roentgen Stages I (80%) or II (74%). We conclude that simultaneous (a) lambda and panda images, or (b) a panda image with bilateral symmetrical hilar lymphadenopathy on chest X-ray represent distinctive patterns which are highly specific for sarcoidosis, and may obviate the need for invasive diagnostic procedures.