Severe traumatic brain lesions in Sweden. Part 3: Economic aspects of aggressive neurosurgical intensive care

150 years of treating severe traumatic brain injury: a systematic review of progress in mortality

Considerable effort and resources have been devoted to preserving life in patients with severe closed traumatic brain injury (TBI). We sought to identify temporal trends in mortality rates of these patients from the late 1800s to the present. We searched the literature for articles on severe TBI, abstracting numbers of patients studied, numbers of deaths, and years of patient entry. Mortality rates were calculated for each study, and meta-regression was used to pool data and to test for significant temporal trends. We reviewed 207 case series comprising more than 140,000 cases of severe closed TBI admitted to hospital over a span of almost 150 years. Since the late 1800s mortality has fallen by almost 50%. However, the rate has varied considerably among the four epochs chosen. Between 1885 and 1930, mortality decreased at a rate of 3% per decade. From 1970 to 1990, mortality declined at a rate of 9% per decade. Both changes are significant. There was no observed improvement in mortality between 1930 and 1970, nor is progress evident since 1990. The authors discuss possible reasons for the apparently intermittent progress in TBI survival over time.

Relationship of aggressive monitoring and treatment to improved outcomes in severe traumatic brain injury

OBJECT

Despite being common practice for decades and being recommended by national guidelines, aggressive monitoring and treatment of patients with severe traumatic brain injury (TBI) have not been supported by convincing evidence.

METHODS

The authors reviewed trials and case series reported after 1970 in which patients were treated for severe closed TBI, and mortality rates and favorable outcomes at 6 months after injury were analyzed. The patient groups were divided into those with and without intracranial pressure (ICP) monitoring and intensive therapy, and the authors performed a meta-analysis to assess the effects of treatment intensity on outcome.

RESULTS

Although the mortality rate fell during the years reviewed, it was consistently approximately 12% lower among patients in the intense treatment group (p < 0.001). Favorable outcomes did not change significantly over time, and were 6% higher among the aggressively treated patients (p = 0.0105).

CONCLUSIONS

Aggressive ICP monitoring and treatment of patients with severe TBI is associated with a statistically significant improvement in outcome. This improvement occurs independently of temporal effects.

Demographics, injury characteristics and outcome of traumatic brain injuries in northern Sweden

OBJECTIVES - To describe demographics, injury characteristics and outcome of traumatic brain injury (TBI) in northern Sweden over 10 years. MATERIAL AND METHODS - Data were retrospectively collected on those individuals (n = 332) in Norrbotten, northern Sweden, with a TBI who had been transferred for neurosurgical care from 1992 to 2001. RESULTS - A majority were older men with a mild TBI and an acute or chronic subdural hematoma following a fall. Younger individuals were fewer but had more often a severe TBI from a traffic accident. Most individuals received post-acute care and brain injury rehabilitation. A majority had a moderate or severe disability, but many were discharged back home with no major changes in their physical or social environment. CONCLUSIONS - Our data confirm the relationship between age, cause of injury, injury severity and outcome in relation to TBI and underscore the need for prevention as well as the importance of TBI as a cause of long-term disability.

Economic aspects of capacity for work after severe traumatic brain lesions

During 1981-84,310 patients with severe traumatic brain lesions were treated at the Department of Neurosurgery in Lund, Sweden. A total of 161 patients were treated after the introduction of a more aggressive management protocol in 1983. In this first part of a long-term follow-up study we concentrate on the economic aspects. Two questions were addressed: first, what was the vocational outcome after severe head injuries? and second, what were the long-term effects of the new protocol? Out of 147 patients classified as good recovery/moderate disability (GR/MD) 6-months after injury, 106 patients agreed to participate in the study. Five to 8 years after injury 70 patients were classified as capable of working: 57 of these patients were actually at work, nine were studying and four were unemployed. Twenty-two patients had received disability pension and 14 patients had retired because of old age. In the age groups up to 60 years, 70% of patients had returned to work or school. The number of patients who returned to work was significantly higher after introduction of the more aggressive management protocol: 38 of 57 patients who had returned to work were in the group treated between 1983 and 1984. Mean income for patients who had returned to work was close to the average for the corresponding age groups in Sweden. Mean sick leave 5-8 years after severe head injuries was only slightly higher than average in Sweden. Our data show that a majority of the patients classified as GR/MD 6 months after severe traumatic brain lesions have the capacity to return to work. The improvements in the primary management of patients with severe head injuries introduced in 1983 increased the number of patients who work and thus increased the number of patients who favourably contributed to the economy of the community.

Clinical outcome and cognitive impairment in patients with severe head injuries treated with barbiturate coma

This study reports on clinical outcome in 38 patients with severe head injuries (posttraumatic coma for 6 hours or more) treated with barbiturate coma because of intracranial hypertension. Eighteen patients died, 4 patients remained in a severely disabled or a chronic vegetative state, and 16 patients reached the levels good recovery/moderate disability. Six of these patients returned to work or school full time, 4 for half time and 3 were in a rehabilitation program. Fourteen patients were subjected to a comprehensive neuropsychological assessment. All patients except one exhibited varying degrees of cognitive dysfunction and 6 patients had signs of personality change. The quality of life for the majority of surviving patients was relatively good but the positive effects of barbiturate coma therapy in the age groups over 40 years appeared to be limited.

Severe traumatic brain lesions in Sweden. Part 2: Impact of aggressive neurosurgical intensive care

During a 6 year period (1977-1982), 425 patients were treated in the Department of Neurosurgery, University Hospital of Lund, for severe traumatic brain lesions (coma greater than 6 hours). From 1983 a more aggressive management protocol was introduced including early recording of intracranial pressure (ICP) and 162 patients were included in the study 1983-1984. A dangerous increase in ICP in spite of adequate surgical treatment and moderately controlled hyperventilation was the incentive for barbiturate coma therapy in selected patients. In the first part of the study overall mortality was 48% whereas 39% of the patients reached good recovery/moderate disability 6 months after injury. During the second part of the study the corresponding figures were 35% and 54%, respectively (in both cases p less than or equal to 0.01). In the group of patients with focal intracranial mass lesions mortality decreased from 59% to 46% (p less than or equal to 0.05) and good recovery/moderate disability increased from 30% to 42% (p less than or equal to 0.05). Improvement in outcome was even more pronounced in patients with no-mass lesions, mortality decreased from 30% to 12% and good recovery/moderate disability increased from 56% to 80% (p less than or equal to 0.05 and p less than or equal to 0.01, respectively). No change occurred in age distribution or in the types of intracranial lesions that could explain these improvements. It is concluded that aggressive neurosurgical intensive care significantly improves outcome in patients with severe traumatic brain lesions.

Severe traumatic brain lesions in Sweden. Part I: Aspects of management in non-neurosurgical clinics

This paper reports a study of 587 consecutive patients treated for severe traumatic brain lesions (coma greater than 6 hours) during 1977-1984. Epidemiology, management and outcome were documented in 425 patients during the first part of the study (1977-1982) as a basis for future efforts at improvements. A total of 70-80 patients with severe head injuries were admitted annually to the Department of Neurosurgery in Lund and 88.6% of these patients were referred from 14 local hospitals, most of which are situated more than 50 km from Lund. Half of the patients were older than 40 years and 25% older than 60. Focal intracranial mass lesions were diagnosed in 64% of the patients. In the total study 41% of the patients were described as 'talk and deteriorate' and 13% as 'talk and die'. In 1983 a protocol for primary management was introduced in all local hospitals in the region. The management protocol caused a significant decrease (p less than or equal to 0.05) in the number of explorative craniotomies in local hospitals and a virtual disappearance of late surgical procedures (greater than 6 hours after injury). A fall was observed in the number of patients arriving at the Department of Neurosurgery with respiratory insufficiency. The study illustrates the epidemiology of severe head injuries in Sweden and the present state of management of these patients in non-neurosurgical departments. It is concluded that an overall outcome comparable to other reported series is also feasible in regions with a relatively sparse population and large geographical distances provided that strict recommendations for initial management are given to the local hospitals.