Surveillance of Depleted Uranium-exposed Gulf War Veterans: More Evidence for Bone Effects.

ABSTRACT: Gulf War I veterans who were victims of depleted uranium (DU) "friendly-fire" incidents have undergone longitudinal health surveillance since 1994. During the spring of 2019, 36 members of the cohort were evaluated with a monitoring protocol including exposure assessment for total and isotopic uranium concentrations in urine and a comprehensive review of health outcomes, including measures of bone metabolism and bone mineral density (BMD) determination. Elevated urine U concentrations were observed in cohort members with retained depleted uranium (DU) shrapnel fragments. In addition, a measure of bone resorption, N-telopeptide, showed a statistically significant increase in those in the high DU subgroup, a finding consistent with a statistically significant decrease in bone mass also observed in this high DU subgroup compared to the low DU subgroup. After more than 25 y since first exposure to DU, an aging cohort of military veterans continues to show few U-related health effects in known target organs of U toxicity. The new finding of impaired BMD in the high DU subgroup has now been detected in two consecutive surveillance visits. While this is a biologically plausible uranium effect, it is not reflected in other measures of bone metabolism in the full cohort, which have largely been within normal limits. However, ongoing accrual of the U burden from fragment absorption over time and the effect of aging further impairing BMD suggest the need for future surveillance assessments of this cohort.

The Gulf War depleted uranium cohort at 20 years: bioassay results and novel approaches to fragment surveillance.

During the 1991 GulfWar, U.S. service members were exposed to depleted uranium (DU) through friendly-fire incidents involving DU munitions and vehicles protected by DU armor. Routes of exposure to DU involved inhalation of soluble and insoluble DU oxide particles, wound contamination, and retained embedded DU metal fragments that continue to oxidize in situ and release DU to the systemic circulation. A biennial health surveillance program established for this group of Veterans by the U.S. Department of Veterans Affairs has shown continuously elevated urine DU concentrations in the subset of veterans with embedded fragments for over 20 years. While the 2011 assessment was comprehensive, few clinically significant U-related health effects were observed. This report is focused on health outcomes associated with two primary target organs of concern for long term effects of this combat-related exposure to DU. Renal biomarkers showed minimal DU-related effects on proximal tubule function and cytotoxicity, but significant biomarker results were observed when urine concentrations of multiple metals also found in fragments were examined together. Pulmonary tests and questionnaire results indicate that pulmonary function after 20 y remains within the clinical normal range. Imaging of DU embedded fragment-associated tissue for signs of inflammatory or proliferative reactions possibly associated with foreign body transformation or with local alpha emissions from DU was also conducted using PET-CT and ultrasound. These imaging tools may be helpful in guiding decisions regarding removal of fragments.

Depression and its relationship to function and medical status, by dementia status, in nursing home admissions.

OBJECTIVE: To determine rates of depression by dementia status in a statewide sample of nursing home admissions, and associations with medical comorbidity and physical functioning. METHODS: Trained interviewers obtained information from nursing home residents, staff, significant others, and medical records. RESULTS: A total of 22.3% were classified depressed in the nondemented status and 23.6% in the demented status. Depression status was significantly associated with more physical dependencies regardless of dementia status. In the nondemented, there was also a significant positive association with number of comorbidities. One interaction, dementia with comorbidity at the highest levels of comorbidity, was significant in looking at association with depression. CONCLUSION: There is significant depressive symptomatology in nursing home admissions, which is also associated with difficulty in physical function and with the number of medical comorbidities in the nondemented. Application of the two measures used in this study represents a strategy to assess depression in all nursing home residents.

Biological monitoring and surveillance results of Gulf War I veterans exposed to depleted uranium.

OBJECTIVE: To relate medical surveillance outcomes to uranium biomonitoring results in a group of depleted uranium (DU)-exposed, Gulf War I veterans. METHODS: Thirty-two veterans of Gulf War I who were victims of 'friendly fire' involving DU weapons, in whom exposure assessment can accurately be measured, had urine uranium concentrations determined using ICP-MS technology. Clinical laboratory parameters were measured and related to urine uranium concentrations. Data were examined by stratifying the cohort into a low U group, <0.10 mug/g creatinine versus a high U group, >/=0.10 mug/g creatinine and assessing differences between groups. RESULTS: Over a decade after first exposure, soldiers possessing embedded DU fragments continue to excrete elevated concentrations of uranium in urine. No clinically significant uranium related health effects were observed in blood count, blood chemistries including renal markers, neuropsychological measures, and semen quality or genotoxicity measures. Markers of early changes in renal glomerular and tubular function were not statistically different between groups; however, genotoxicity measures continue to show subtle, mixed results. CONCLUSION: Persistent urine uranium elevations continue to be observed more than 12 years since first exposure. Despite this, renal and other clinical abnormalities were not observed, likely due to the 'relatively' low uranium burden in this cohort compared to historical uranium-exposed occupational groups. Continuing surveillance is indicated, however, due to the on-going nature of the exposure. These results are an important finding in light of the on-going controversy regarding health effects observed in soldiers of the Gulf War and other conflicts, whose uranium exposure assessment is unable to be accurately determined.

Some predictors of psychiatric consultation in nursing home residents.

OBJECTIVE: Despite the high rate of psychiatric disorders in nursing homes, research indicates that psychiatric consultation is requested infrequently. The authors sought to determine the rate of psychiatric consultation in a nursing home population and to assess what factors were related to a consultation request. METHODS: Subjects were recruited from a stratified random sample of 59 nursing homes across Maryland. All new admissions age 65 years and older from September 1992 through March 1995 were eligible for the study. A total of 2,285 subjects were included in the study. Variables examined were factor scores from the Cornell Scale for Depression in Dementia and the Psychogeriatric Dependency Rating Scale (Behavioral Subscale), nursing home characteristics, and whether the resident had a psychiatric consultation within 90 days of admission. RESULTS: Twenty percent of the residents (N=404) had a psychiatric consultation. There was no significant association with demographic variables. Behaviors that triggered a psychiatric consultation included agitation, physical/verbal abuse, wandering, and manic/destructive acts. A psychiatric consultation was also requested when residents displayed anxiety. Surprisingly, depression in retarded and psychotic residents did not trigger a psychiatric consult. CONCLUSION: As expected, behavioral problems and agitation are common reasons for a psychiatric consultation. However, the resident who is depressed, particularly the quiet or retarded depressed resident, may be overlooked. In this context, it is important for the nursing staff to recognize that lethargy and social withdrawal may be signs of depression, and a referral to a psychiatrist may be in order.

Health effects of depleted uranium on exposed Gulf War veterans: a 10-year follow-up.

Medical surveillance of a group of U.S. Gulf War veterans who were victims of depleted uranium (DU) "friendly fire" has been carried out since the early 1990s. Findings to date reveal a persistent elevation of urine uranium, more than 10 yr after exposure, in those veterans with retained shrapnel fragments. The excretion is presumably from ongoing mobilization of DU from fragments oxidizing in situ. Other clinical outcomes related to urine uranium measures have revealed few abnormalities. Renal function is normal despite the kidney's expected involvement as the "critical" target organ of uranium toxicity. Subtle perturbations in some proximal tubular parameters may suggest early although not clinically significant effects of uranium exposure. A mixed picture of genotoxic outcomes is also observed, including an association of hypoxanthine-guanine phosphoribosyl transferase (HPRT) mutation frequency with high urine uranium levels. Findings observed in this chronically exposed cohort offer guidance for predicting future health effects in other potentially exposed populations and provide helpful data for hazard communication for future deployed personnel.

Association of depression with agitation in elderly nursing home residents.

Agitation is a serious problem for elderly individuals with dementia. It is often the major reason for admission to a restrictive environment such as a nursing home or hospital. The objectives of the current study were to (1) identify the components of agitation embedded in the Psychogeriatric Dependency Rating Scale (PGDRS) and (2) find race, gender, depression, and cognitive deficits associated with the factors extracted from the PGDRS in demographic variables and clinical variables. The study sample comprised 2285 subjects who were admitted to 59 nursing homes across Maryland. The factor analysis of the PGDRS confirmed that agitation is made up of a number of different elements ranging from physical and/or verbal aggression to wandering. Correlates of these elements varied, as did possible treatments. For example, physical and/or verbal aggression often accompanied severe depression, suggesting that treating the depression may alleviate this problem. However, wandering and psychotic behavior may be less amenable to existing treatments as these behaviors were associated with severe cognitive impairment.

Significant life Events and PTSD in Elderly World War II Veterans.

The authors reviewed clinic records of 20 WWII veterans referred for evaluation of posttraumatic stress disorder (PTSD). Twelve patients qualified for a diagnosis of PTSD, and eight reported several symptoms of PTSD. The most frequent symptoms were insomnia (80%), nightmares (75%), and irritability (65%). Fourteen veterans had an exacerbation of symptoms occurring with life stresses, including retirement, deteriorating health, or death of a loved one. The authors conclude that elderly WWII combat veterans should be monitored for changes in PTSD symptoms when significant stressful life events occur.