标准大骨瓣开颅术结合颅内压监测治疗重型颅脑损伤

目的探讨标准大骨瓣开颅术结合颅内压监测治疗重型颅脑损伤的疗效。方法回顾性分析手术治疗重型颅脑损伤患者78例的临床资料,采用标准大骨瓣减压结合颅内压监测治疗38例患者为A组,采用常规骨瓣减压治疗40例患者为B组。比较两组患者术后6个月的临床疗效。结果 A组患者的临床效果好于B组。两组在术后6个月临床疗效方面比较,差异有统计学意义（P〈0.05）。结论标准大骨瓣开颅术结合颅内压监测显著改善重型颅脑损伤患者的预后。     

有创颅内压监护在重型脑损伤术后的应用

目的探讨有创颅内压监护在重型脑损伤术后的临床应用价值。方法选取2011年1月-2012年9月于我院进行开颅手术及脑室外引流术的重型颅脑损伤患者108例,根据随机原则分为实验组和对照组,每组54例。实验组和对照组患者均采用止血、抗感染、脱水、神经营养等治疗。实验组：使用Codman颅内压监护仪对患者进行硬膜下的颅内压监护。对照组：对患者颅内压不进行检测,仅按照传统方法进行颅内压预测和治疗。结果实验组和对照组相比在甘露醇使用时间及用量、肾功能损害程度和电解质紊乱等并发症的发生率、预后评估等各方面差异有统计学意义（P〈0.05）。结论使用颅内压监护可以明显提高重型颅脑损伤患者的临床疗效,值得推广应用。     

外伤性蛛网膜下腔出血对重型颅脑损伤患者Marshall CT分级预后的影响

目的研究外伤性蛛网膜下腔出血是否影响颅脑损伤患者Marshall CT分级的预后。方法收集本院2008年2月至2008年12月间共66例重型颅脑损伤患者,按照Marshall CT分级分为弥漫性损伤组和局灶性损伤组,分析外伤性蛛网膜下腔出血的发生率及对其预后的影响。结果66例重型颅脑损伤的患者中,合并外伤性蛛网膜下腔出血的发生率高达77．27％,并且预后较差。根据Marshall CT分级,弥漫性损伤组中,伤后6个月GOS评分合并蛛网膜下腔出血者平均为3．00,不合并者为4．25;局灶性损伤组中,伤后6个月GOS评分合并蛛网膜下腔出血者平均为1．91,不合并者为3．00,鼹者有统计学差异（P〈0．05）。结论外伤性蛛网膜下腔出血在重型颅脑损伤患者中极为常见,并且影响Marshall CT分级的预后。     

Routine surveillance imaging following mild traumatic brain injury with intracranial hemorrhage may not be necessary

Background

Mild traumatic brain injury (mTBI) comprises the majority of pediatric traumatic brain injury. Children with mTBI even with traumatic intracranial hemorrhage (tICH) rarely experience a clinically significant neurologic decline (CSND). The utility of routine surveillance imaging in the pediatric population also remains controversial, especially owing to concerns about the risks of radiation exposure at a young age. This study aims to identify demographic or injury-related characteristics that may facilitate recognition of children at risk of progression with mTBI.

The impact of intracranial pressure monitoring on mortality after severe traumatic brain injury

Background

The effect of intracranial pressure (ICP) monitoring on mortality after severe traumatic brain injury (sTBI) remains unclear. We hypothesized that ICP monitoring would not be associated with improved survival in patients with sTBI.

Methods

A retrospective analysis was performed on sTBI patients, defined as admission Glasgow Coma Scale score of 8 or less with intracranial hemorrhage. Patients who underwent ICP monitoring were compared with patients who did not. The primary outcome measure was inhospital mortality.

Results

Of 123 sTBI patients meeting inclusion criteria, 40 (32.5%) underwent ICP monitoring. On bivariate and multivariate regression analyses, ICP monitoring was associated with decreased mortality (odds ratio = .32, 95% confidence interval = .10 to .99, P = .049). This finding persisted on propensity-adjusted analysis.

Conclusions

ICP monitoring is associated with improved survival in adult patients with sTBI. In addition, significant variability exists in the use of ICP monitoring among patients with sTBI.     

Intracranial pressure versus cerebral perfusion pressure as a marker of outcomes in severe head injury: a prospective evaluation

Background

Intracranial pressure (ICP) monitoring is a standard of care in severe traumatic brain injury when clinical features are unreliable. It remains unclear, however, whether elevated ICP or decreased cerebral perfusion pressure (CPP) predicts outcome.

Methods

This is a prospective observational study of patients sustaining severe blunt head injury, admitted to the surgical intensive care unit at the Los Angeles County and University of Southern California Medical Center between January 2010 and December 2011. The study population was stratified according to the findings of ICP and CPP. Primary outcomes were overall in-hospital mortality and mortality because of cerebral herniation. Secondary outcomes were development of complications during the hospitalization.

Results

A total of 216 patients met Brain Trauma Foundation guidelines for ICP monitoring. Of those, 46.8% (n = 101) were subjected to the intervention. Sustained elevated ICP significantly increased all in-hospital mortality (adjusted odds ratio [95% confidence interval]: 3.15 [1.11, 8.91], P = .031) and death because of cerebral herniation (adjusted odds ratio [95% confidence interval]: 9.25 [1.19, 10.48], P = .035). Decreased CPP had no impact on mortality.

Conclusions

A single episode of sustained increased ICP is an accurate predictor of poor outcomes. Decreased CPP did not affect survival.     

颅内压监测下脑室外引流、腰大池引流治疗脑室岀血的疗效观察

目的 探讨颅内压监测下脑室外引流、腰大池引流治疗脑室岀血的疗效.方法 以本院就诊的重型脑室出血患者为研究对象.随机分成试验组和对照组.试验组给予颅内压监测下行脑室外引流;腰大池引流,对照组根据患者症状、体征和CT扫描结果 进行脑室外引流、腰大池引流.比较两组预后、并发症(颅内感染、脑积水、脑疝、再出血)、脑室引流时间、住院时间的差别.结果 ①试验组疗效显著优于对照组,差异有统计学意义(χ2＝9.621,P＜0.05);②试验组颅内感染、脑积水和脑疝发生率显著低于对照组,差异有统计学意义(P＜0.05);③试验组脑室引流时间和住院时间均显著低于对照组,差异有统计学意义(P＜0.05).结论 颅内压监测下脑室外引流、腰大池引流治疗脑室岀血疗效好,可减少并发症,降低住院时间.     

Decompressive hemicraniectomy in patients with subarachnoid hemorrhage and intractable intracranial hypertension

Summary Background and purpose. To evaluate the outcome of patients with aneurysmal subarachnoid hemorrhage (aSAH) developing intractable intracranial hypertension and treated by decompressive hemicraniectomy (DHC). Methods. Of 193 patients with aSAH 38 patients were treated with DHC after early aneurysm clipping. Indications for DHC were 1. Signs of brain swelling during aneurysm surgery (group 1: primary DHC). 2. Intracranial pressure- (ICP)-elevation and epidural, subdural or intracerebral hematoma after aneurysm surgery (group 2: secondary DHC due to hematoma) 3. Brain edema and elevated ICP without radiological signs of infarction (group 3: secondary DHC without infarction). 4. Brain edema and elevated ICP with radiological signs of infarction (group 4: secondary DHC with infarction). Results. Thirty-one patients (81.6%) suffered from high grade aSAH Hunt & Hess 4–5. 21 belonged to group 1, five to group 2, six to group 3 and six to group 4. Of a total of 38 patients a good functional outcome according to Glasgow Outcome Score (GOS 4 & 5) could be reached in 52.6% of the cases. 26.3% survived severely disabled (GOS 3), no case suffered from a vegetative state (GOS 2) but 21.1% died (GOS 1). After 12 months good functional outcome could be achieved in 52.4% of the cases in group 1, in 60% in group 2, in 83.3% in group 3 and in 16.7% in group 4. Conclusions. In more than half of the patients with intractable intracranial hypertension after aSAH a good functional outcome could be achieved after DHC. Patients with progressive brain edema without radiological signs of infarction and those with hematoma may benefit most. The indication for DHC should be set restrictively if secondary infarcts are manifest.     

Cerebral blood flow and intracranial pressure during experimental subarachnoid haemorrhage

Summary The relationships of intracranial pressure (ICP), systemic blood pressure (SBP) and cerebral blood flow (CBF) during experimental subarachnoid haemorrhage were investigated in cats. Continuous monitoring of regional cerebral blood flow (rCBF) was done by a thermal diffusion method using a Peltier stack. During haemorrhage ICP rose within 5.4±0.97 minutes from 10.5±4.9 to 176.1±27.8 mmHg. This strong increase of ICP resulted in a temporary arrest of cerebral circulation. The Cushing response during the haemorrhage could not improve the cerebral circulation, but in contrast caused a further increase of ICP. After the haemorrhage the cerebral blood flow normalised within minutes. It is concluded, that the Cushing response during a subarachnoid haemorrhage should be regarded as a deleterious rather than a beneficial mechanism.     

有创颅内压监测在重型颅脑创伤救治中的应用价值

目的探讨持续动态颅内压监测在重型颅脑创伤治疗中的价值。方法2011年1月-2012年6月对21例重型颅脑创伤采用硬膜下颅内压监测法对术后颅内压进行动态监测,同时观察生命体征和GCS评分变化。结果术后颅内压正常（〈2．0kPa）4例,轻度增高（2．0—2．7kPa）5例,中度增高（〉2．7—5．5kPa）6例,重度增高（〉5．5kPa）6例,死亡5例。结论颅内压动态监测有助于对病情变化的正确判断,可为颅脑创伤的早期诊断、正确治疗及预后提供重要的参考依据。     

Early change of plasma and cerebrospinal fluid arginine vasopressin in traumatic subarachnoid hemorrhage

Objective： To investigate the changes and effects of arginine vasopressin （AVP） in patients with acute traumatic subarachnoid hemorrhage （tSAH）. Methods： The plasma and cerebrospinal fluid （CSF） level of AVP, and intracranial pressure （ICP） were measured in a total of 21 patients within 24 hours after tSAH. The neurological status of the patients was evaluated by Glasgow Coma Scale （GCS）. Correlation between AVP and ICP, GCS was analyzed respectively. Meanwhile, 18 healthy volunteers were recruited as control group. Results： Compared with control group, the levels （pg/ml） of AVP in plasma and CSF （x±s） in tSAH group were significantly increased within 24 hours （38.72±24.71 vs 4.54±1.38 and 34.61±21.43 vs 4.13± 1.26, P〈0.01）, and was remarkably higher in GCS ≤8 group than GCS〉8 group （50.96±36.81 vs 25.26±12.87 and 44.68±31.72 vs 23.53±10.94, P〈0.05）. The CSF AVP level was correlated with ICP （r= 0.46, P〈0.05）, but no statistically significant correlation was found between plasma AVP, CSF AVP and initial GCS （r= -0.29, P〉0.05 and r= -0.32, P〉0.05, respectively）. The ICP （ram Hg） in tSAH patients was elevated and higher in GCS ≤ 8 group than in GCS〉8 group （25.9±9.7 vs 17.6±5.2, P〈0.05）. Conclusion： Our research suggests that AVP is correlated with the severity oftSAH, and may be involved in the pathophysiological process of brain damage in the early stage after tSAH. It seems that compared with the plasma AVP concentration, CSF AVP is more related to the severity oftSAH.     

Metabolic failure precedes intracranial pressure rises in traumatic brain injury: a microdialysis study

Summary Background: Cerebral microdialysis (MD) is able to detect markers of tissue damage and cerebral ischaemia and can be used to monitor the biochemical changes subsequent to head injury. In this prospective, observational study we analysed the correlation between microdialysis markers of metabolic impairment and intracranial pressure (ICP) and investigated whether changes in biomarker concentration precede rises in ICP. Methods: MD and ICP monitoring was carried out in twenty-five patients with severe TBI in Neurointensive care. MD samples were analysed hourly for lactate:pyruvate (LP) ratio, glutamate and glycerol. Abnormal values of microdialysis variables in presence of normal ICP were used to calculate the risk of intracranial hypertension developing within the next 3 h. Findings: An LP ratio >25 and glycerol >100 μmol/L, but not glutamate >12 μmol/L, were associated with significantly higher risk of imminent intracranial hypertension (odds ratio: 9.8, CI 5.8–16.1; 2.2, CI 1.6–3.8; 1.7, CI 0.6–3, respectively). An abnormal LP ratio could predict an ICP rise above normal levels in 89% of cases, whereas glycerol and glutamate had a poorer predictive value. Conclusions: Changes in the compound concentrations in microdialysate are a useful tool to describe molecular events triggered by TBI. These changes can occur before the onset of intracranial hypertension, suggesting that biochemical impairment can be present before low cerebral perfusion pressure is detectable. This early warning could be exploited to expand the window for therapeutic intervention. Correspondence: Antonio Belli, FRCS (Gla), FRCS (SN), MD, Division of Clinical Neurosciences, Southampton University Hospital, Tremona Road, Southampton SO16 6YD, UK.     

Continuous cerebral compliance monitoring in severe head injury: its relationship with intracranial pressure and cerebral perfusion pressure

Summary Background. Cerebral compliance expresses the capability to buffer an intracranial volume increase while avoiding a rise in intracranial pressure (ICP). The autoregulatory response to Cerebral Perfusion Pressure (CPP) variation influences cerebral blood volume which is an important determinant of compliance. The direction of compliance change in relation to CPP variation is still under debate. The aim of the study was to investigate the relationship between CPP and compliance in traumatic brain injured (TBI) patients by a new method for continuous monitoring of intracranial compliance as used in neuro-intensive care (NICU).Method. Three European NICU’s standardised collection of CPP, compliance and ICP data to a joint database. Data were analyzed using an unpaired student t-test and a multi-level statistical model.Results. For each variable 108,263 minutes of data were recorded from 21 TBI patients (19 patients GCS≤8; 90% male; age 10–77 y). The average value for the following parameters were: ICP 15.1±8.9 mmHg, CPP 74.3±14 mmHg and compliance 0.68±0.3 ml/mmHg. ICP was ≥20 mmHg in 20% and CPP<60 mmHg for 10.7% of the time. Compliance was lower (0.51±0.34 ml/mmHg) at ICP≥20 than at ICP<20 mmHg (0.73±0.37 ml/mmHg) (p<0.0001). Compliance was significantly lower at CPP<60 than at CPP≥60 mmHg: 0.56±0.36 and 0.70±0.37 ml/mmHg respectively (p<0.0001). The CPP – compliance relationship was different when ICP was above 20 mmHg compared with below 20 mmHg. At ICP<20 mmHg compliance rose as CPP rose. At ICP≥20 mmHg, the relation curve was convexly shaped. At low CPP, the compliance was between 0.20 and 0.30 ml/mmHg. As the CPP reach 80 mmHg average compliance was 0.55 ml/mmHg., but compliance fell to 0.40 ml/mmHg when CPP was 100 mmHg.Conclusions. Low CPP levels are confirmed to be detrimental for intracranial compliance. Moreover, when ICP was pathological, indicating unstable intracranial equilibrium, a high CPP level was also associated with a low volume-buffering capacity.     

重型颅脑损伤后脑组织氧分压和颅内压监测及其临床意义

目的探求重型颅脑损伤患者颅内压(ICP)和脑组织氧分压(PbtO2)的变化及临床意义。方法选择重型脑损伤患者(GCS<8)28例,PbtO2持续监测,同时行颅内压(ICP)、血电解质、动脉血氧分压(PaO2)、动脉血二氧化碳分压(PaCO2)测定;分析ICP和PbtO2的变化规律及意义。结果(1)伤后24小时PbtO2≤5mmHg,ICP≥40mmHg无法降压者预后不良;(2)伤后ICP、PaO2、PaCO2明显影响患者PbtO2;(3)没有发生与插入监测电极相关的并发症。结论脑组织氧分压测定是一种安全、可靠、灵敏的脑组织氧合程度监测方法,可反映出重型脑损伤后的脑组织缺血缺氧情况,提示预后,对临床治疗具有重要的指导作用。     

Responsiveness to therapy for increased intracranial pressure in traumatic brain injury is associated with neurological outcome

In patients with severe traumatic brain injury, increased intracranial pressure (ICP) is associated with poor functional outcome or death. Hypertonic saline (HTS) is a hyperosmolar therapy commonly used to treat increased ICP; this study aimed to measure initial patient response to HTS and look for association with patient outcome.Patients >17 years old, admitted and requiring ICP monitoring between 2008 and 2010 at a large urban tertiary care facility were retrospectively enrolled. The first dose of hypertonic saline administered after admission for ICP >19 mmHg was recorded and correlated with vital signs recorded at the bedside. The absolute and relative change in ICP at 1 and 2 h after HTS administration was calculated. Patients were stratified by mortality and long-term (≥6 months) functional neurological outcome.We identified 46 patients who received at least 1 dose of HTS for ICP > 19, of whom 80% were male, mean age 34.4, with a median post-resuscitation GCS score of 6. All patients showed a significant decrease in ICP 1 h after HTS administration. Two hours post-administration, survivors showed a further decrease in ICP (43% reduction from baseline), while ICP began to rebound in non-survivors (17% reduction from baseline). When patients were stratified for long-term neurological outcome, results were similar, with a significant difference in groups by 2 h after HTS administration.In patients treated with HTS for intracranial hypertension, those who survived or had good neurological outcome, when compared to those who died or had poor outcomes, showed a significantly larger sustained decrease in ICP 2 h after administration. This suggests that even early in a patient's treatment, treatment responsiveness is associated with mortality or poor functional outcome. While this work is preliminary, it suggests that early failure to obtain a sustainable response to hyperosmolar therapy may warrant greater treatment intensity or therapy escalation.     

A computer-based method for comparisons of continuous intracranial pressure recordings within individual cases

Summary ?Background. This study assessed two strategies of comparing continuous intracranial pressure (ICP) recordings within individual cases, namely either by calculation of differences in mean ICP or by calculation of differences in numbers of ICP elevations. Methods. Continuous ICP recordings before and after cranial surgery were both presented as mean ICP and as numbers of ICP elevations of different levels (20 and 25 mmHg lasting either 0.5 or 1 minute). Since the length of pressure recordings differed somewhat between individuals, the numbers of ICP elevations were standardised by computing the numbers of elevations during a 10 hours period. The ICP recordings were analysed by the Sensometrics^™ Pressure Analyser software. The ICP curves included here were selected from a group of 15 children undergoing calvarial expansion surgery for craniosynostosis, in whom continuous ICP monitoring was performed both before and after surgery as part of the diagnostic workout to rule out lasting intracranial hypertension. Findings. After surgery, mean ICP during sleep was reduced by 5 mmHg or more in 5 cases, minimally changed (i.e. 2 mmHg or less) in 6 cases, and variably increased in the other 4 cases. In one of these 4 latter cases, numbers of ICP elevations were increased after surgery, but in all other 14 cases the numbers of ICP elevations were significantly reduced. Reduction of mean ICP by more than 2 mmHg associated with good outcome was observed in 3 of 15 cases (20%), whereas marked and significant reductions in numbers of ICP elevations during sleep combined with good outcome was observed in 12 of 15 cases (80%). Interpretation. Outcome after the 2^nd ICP monitoring was more reliably predicted by computing differences in numbers of ICP elevations than by calculation of mean ICP. Published online June 4, 2003     

短期应用高渗盐水对重症蛛网膜下腔出血患者颅内压、脑血流量的影响

目的 探讨23.4%高渗盐水(HTS)对重症蛛网膜下腔出血(SAH)患者颅内压、脑灌注压、脑血流量(CBF)的影响.方法 16例重症SAH患者(GCS≤8分)在颅压升高时接受静脉输注23.4%HTS,监测用药前及用药后30、60、90、120、150、180 min的颅内压(ICP),平均动脉压(MAP),脑灌注压(CPP)及脑血流速度(FV).结果 用药后30 min可见ICP显著降低,同时MAP、CPP及FV显著升高(P<0.05),ICP显著降低可持续180 min,CPP和FV的改善持续约90 min(P<0.05).结论 HTS能显著降低重症SAH患者的ICP,改善脑组织灌注,可用来纠正脑缺血引起的病生理变化.     

Decompressive craniectomy in pediatric patients with traumatic brain injury with intractable elevated intracranial pressure

Background

Care of pediatric traumatic brain injury (TBI) has placed emphasis on maximizing cerebral perfusion to prevent ischemia and reperfusion injury. A subset of patients with TBI will continue to have refractory intracranial pressure (ICP) elevation despite aggressive therapy including ventriculostomy, pentobarbital coma, hypertonic saline, and diuretics. Decompressive craniectomy (DC) is a controversial treatment of severe TBI. It is our hypothesis that DC can enhance survival and minimize secondary brain injury in this patient subset.

Methods

Patients younger than 20 years treated at a level I regional trauma center between November 2001 and November 2004, who met inclusion criteria for the Brain Trauma Foundation TBI-trac clinical database were included. All patients with a mechanism of injury consistent with TBI and Glasgow Coma Scale score of less than 9 for at least 6 hours after resuscitation and who did not die in the emergency department are entered into a clinical database. Patients who arrived at the study hospital more than 24 hours after injury are excluded.

Results

There were 30 patients with TBI identified. The mean Glasgow Coma Scale score at presentation was 8 with a range of 3 to 13. Six patients underwent DC for intractable elevated ICP. Of 6 patient's postoperative ICP, 5 were less than 20 mm Hg. One patient required a return to the operating room where further débridement of brain was performed. All patients who received a DC survived and were discharged to a TBI rehabilitation facility.

Conclusion

Although this is a small sample, DC should be considered in patients with TBI with refractory elevated ICP. Long-term follow-up of this patient population should consist of neuropsychiatric evaluation in conjunction with measurement of social function.     

Intracranial pressure changes during fluid percussion,controlled cortical impact and weight drop injury in rats

Summary Background. In traumatic brain injury research, the fluid percussion injury (FPI) model in the rat is widely used. The injury is graded based on indirect criteria, such as the extracranial pressure wave and/or physiological responses to the injury. We designed this study to investigate if the extracranially monitored pressure in the FPI-device corresponded to the actual intracranial situation. Severe controlled cortical impact (CCI) and severe weight drop injury (WDI) were studied for comparison.Method. We tested the correlation between the extra- and intracranial pressures during severe FPI in rat (2.6–2.9 atm), using pressure probes (diameter 0.34 mm) with high frequency (500 Hz) and high pressure range (1–5 atm). The probes were inserted into either of the lateral ventricles in FPI and in the contralateral lateral ventricle in CCI and WDI to compare the ictal pressure pulses between the models.Findings. FPI showed a time lag between the extracranial, intracranial ipsilateral and intracranial contralateral pressure curves respectively, reflecting the different distances between the pressure source and the individual pressure probes. There was a high degree of correlation (r = 0.994, p<0.0001) between the extra- and intracranial pressure pulses, once corrected for the time lag.We found no significant differences between the extracranial and the intracranial peak pressure in either ventricle in FPI. In CCI and WDI the contralateral pressure pulses were significantly smaller than in FPI. CCI resulted in higher pressure peaks than WDI, due to higher impact velocity.Conclusions. The extracranial pressure pulse appears to be a good estimate of the intraventricular pressure pulse generated during FPI. Severe CCI and WDI generated intraventricular pressure pulses of much lower magnitude than FPI, explaining the lesser degree of brain stem involvement in the former models.     

Multiple intracranial subarachnoid osteomas

OBJECTIVE AND IMPORTANCE: Intracranial osteomas, which have no connections with the dura or the skull, are very rare. Here we report one case of multiple intracranial subarachnoid osteomas. CLINICAL DESCRIPTION: A 24-year-old gentleman, who had no previous history of systemic disease, meningitis or head injury, presented with a 6-month history of non-specific intermittent headache over the whole head. Neuro-imaging showed multiple ossified lesions in the right frontal area, which were found to compress the underlying cerebral hemisphere. The patient underwent a right frontal craniotomy. The masses were dissected from the depressed brain along the intact pial planes, however, all of the white bone-hard masses tightly adhered to the superficial cortical veins. The masses were removed and the cortical veins were sacrificed. The patient had headaches and was nauseous for three days after the surgery due to venous congestion; however, the patient was neurologically intact on discharge. Pathological diagnosis was osteoma. CONCLUSION: To our knowledge, this is the first report of multiple intracranial subarachnoid osteomas. Surgical findings strongly support the hypothesis of the origin of the tumour that the primitive mesenchymal cells from the connective tissue might have migrated into the subarachnoid space accompanying the intracerebral blood vessels.