Research Article - Biomedical Research (2018) Volume 29, Issue 11

The factors affecting morbidity and mortality in spontaneous intracerebral hematomas

Ömer Aykanat^1* and Metin Ocak²

¹Department of Neurosurgery, Medical Faculty, Ahi Evran University, Kırsehir, Turkey

²Department of Emergency, Medical Faculty, Ahi Evran University, Kırsehir, Turkey

*Corresponding Author:

Ömer Aykanat
Department of Neurosurgery
Medical Faculty, Ahi Evran University
Turkey

Accepted date: April 16, 2018

Abstract

Objective: In this study, 33 patients with a diagnosis of spontaneous intracerebral hematomas were investigated retrospectively and factors affecting morbidity and mortality were determined.

Materials and Methods: In this study, 33 patients with a diagnosis of SIH in intensive care unit (ICU) of Ahi Evran University Medical Faculty Hospital were retrospectively reviewed between the dates of 01.09.2016 and 30.11.2017. The factors affecting morbidity and mortality in these patients were studied in detail by reviewing the patients’ age, gender, admission condition, GCS score, personal background, hematoma location, hematoma volume, presence/absence of intraventricular hemorrhage, type of therapy and discharge condition.

Results: The study included 18 female (54.5%) and 15 male patients (45.5%) whose ages were in the range of 43-91. Seen in 21 patients (63.6%), blackout was the leading cause for the admission. As a result of the neurological examination on admission, of all the patients, GCS scores of 11 patients (33.3%) were in the range of 3-7; it was between 8-13 in 17 patients (51.5%) and between 14-15 in 5 patients (15.1%). When their personal bacgrounds were reviewed, hypertension in 19 patients (57.6%) was seen as the most common etiological factor. We observed lobar region was the most frequent site for the spontaneous intracerebral hematomas. 3 patients (9.1%) were applied surgical operation, 4 patients (12.1%) were applied External Ventricular Drainage and 26 patients (78.8%) were followed up with medical treatment. The follow-up length of the patients varied in the range of 3-72 days. While 13 patients (39.4%) were discharged with a full-recovery and 5 patients with morbidity (15.%), the other 15 patient (45.5%) died.

Conclusion: As a conclusion, it could be said that while hematoma volume, hematoma location and presence/absence of intraventricular hemorrhages have significant effect on morbidity and mortality in SIHs, the most significant factor is the patients’ GCS on admission. In our study, age had no significant effect on mortality and morbidity.

Keywords

Intracerebral hematoma, Spontaneous, Morbidity, Mortality

Introduction

Spontaneous intracerebral hematomas (SIHs), which are intraparenchymal hemorrages result from various nontraumatic causes, were first defined by Charles Baplesy in 1932 [1]. Being one of the leading causes of cerebrovascular diseases and having about 15/10.000 rate of incidence, SIHs has a 50% monthly mortality rate [2]. Etiology of SIHs comprise of such vascular pathologies as anti-coagulant usage, amyloid angiopathy, anteriovenous malformation and use of alcohol. However, the most common etiological factor is hypertension (HT) [3,4]. The condition of the patients during emergency ward admission varies depending on the volume and location of hematoma and the age of patient. However, the disease prognosis, vary by Glasgow Coma Scale (GCS) during hospital admission, presence/absence of intraventricular hemorrhage and comorbid diseases [5]. While the golden standard is brain Computed Tomography (CT) for diagnosis, in some cases Magnetic Resonance Imaging (MRI) can also be used. Surgical or medical therapy can be chosen for treatment depending on the age of patient, GCS score, location and volume of hematoma.

In this study, 33 patients with a diagnosis of SIH in intensive care unit (ICU) of Ahi Evran University Medical Faculty Hospital were retrospectively examined and the factors affecting morbidity and mortality in the patients were studied with literature between the dates of 01/09/2016 and 30/11/2017.

Materials and Methods

In this study, 33 patients with a diagnosis of SIH in intensive care unit (ICU) of Ahi Evran University Medical Faculty Hospital were retrospectively reviewed between the dates of 01/09/2016 and 30/11/2017. The factors affecting morbidity and mortality in these patients were studied in detail by reviewing the patients’ age, gender, admission condition, GCS score, personal background, hematoma location, hematoma volume, presence/absence of intraventricular hemorrhage, type of therapy (surgical or medical) and discharge condition. In our study, we reviewed spontaneous supratentorial hematomas but we excluded infratentorial and traumatic ones and the ones caused by tumor and vascular malformation.

The ethical approval was obtained from the ethics committee of Medical Faculty in Ahi Evran University on 13/02/2018 with 2018-03/36 code number.

Results

The study included 18 female (54.5%) and 15 male patients (45.5%) whose ages were in the range of 43-91 and the mean age was 70. Seen in 21 patients (63.6%), blackout was the leading cause for the admission, followed by hemiparesis in right/left part of body seen in 9 patients (27.3%) and headache seen in 7 patients (21.2%) respectively. As a result of the neurological examination on admission, of all the patients, GCS scores of 11 patients (33.3%) were in the range of 3-7; it was between 8-13 in 17 patients (51.5%) and between 14-15 in 5 patients (15.1%). When their personal bacgrounds were reviewed, hypertension (HT) in 19 patients (57.6%) was seen as the most common etiological factor, followed by anticoagulant use (36.4%) and 5 patients (15.1%) had no any case history. All the patients were diagnosed with brain CT. We observed lobar hematoma in 16 patients (48.5%); thalamic hematoma in 14 patients (42.4%) and basal ganglia hematoma in 3 patients (9.1%). Moreover, we observed the presence of intravenricular hemorrhage in 10 out of 17 patients having thalamic and basal ganglia hematomas. The size of hematomas were calculated by measuring x-y-z axes on CT images (Figure 1). The volume of hematomas were seen to be in the range of 1 ml-105 ml and the average volume was 19.6 ml. 3 patients (9.1%) were applied surgical operation (hematoma evacuation by craniotomy); 4 patients (12.1%) were applied External Ventricular Drainage (EVD) and 26 patients (78.8%) were followed up with medical treatment. The follow-up length of the patients varied in the range of 3-72 days. While 13 patients (39.4%) were discharged with a full-recovery and 5 patients with morbidity (15.1%), the other 15 patients (45.5%) died (Table 1).

Table 1: Distribution of the patients’ age, gender, complaints, GCS, case history and discharce condition and the distribution of localization and volume of hematomas and presence/absence of intraventricular hemorrhage.

Figure 1: The size of hematomas, calculated by measuring x-y-z axes on CT image.

The age range of the patients discharged with full-recovery was 48-91 and the average age was 69. Their GCSs on admission were in the range of 12-15. While 9 out of these 13 patients had lobar hematomas and 1 patient had basal ganglia hematoma, the others had thalamic hematomas. The hematoma volumes were between 1 ml-30 ml and the average value was 10.2 ml. We observed presence of intraventricular hemorrhage only in 1 out of 4 patients who had thalamic and basal ganglia hematomas. Age range of the patients disharged with morbidity was 43-77 and the average age was 66.6. Their GCS range was 7-12 on admission. While 1 out of 5 patients had lobar hematoma, the other 4 ones had thalamic hematomas. The hematoma volumes were between 7.5 ml-75 ml and the average value was 28.8 ml. We observed presence of intraventricular hemorrhage only in 2 out of 4 patients who had thalamic hematomas. Age range of the patients having died was 53-91 and the average age was 69.6. Their GCS range was 3-11 on admission. While 4 out of 15 patients had lobar hematoma, 9 patients had thalamic hematomas, the other 2 ones had basal ganglia hematomas. The hematoma volumes were between 2 ml-105 ml and the average value was 25.8 ml. We observed presence of intraventricular hemorrhage only in 7 out of 11 patients who had thalamic and basal ganglia hematomas.

Discussion and Conclusion

Spontaneous Intracerebral Hematomas (SIHs), which are defined as intraparenchymal hemorrhage without trauma, has an average incidence rate of 15/100000 but the rate has been indicated to vary in the range of 12-51.8/100000 [5-10]. About one fifth of SIHs are supratentorial. Some studies have indicated that SIHs occur more frequently in 5th and 6th decades of lifespan and are seen more in males and gender has no significant effect on mortality [4-6,11]. As opposed to literature, in our case serial, 72.7% of the patients had ages in and above 7th decade and 80% of the 15 patients who died were females. The most significant risk factor is HT in literature, followed by old age, use of anticoagulant, DM (diabetes mellitus), alcohol, obesity, vascular malformations and amiloid angiopathy [12-14]. In our study, HT and use of anticoagulant took the first and second place as etiological factors with their rate of 57.6% and 36.4% respectively, which is compatible with literature. The fact that there was no risk factor for 15.1% of the patients is quite interesting but it should be kept in mind that a sudden HT attack might have occurred in these patients.

There are variations in localization of SIHs. While some studies point out basal ganglia and thalamic region, others refer to lobar region as the most common location for SIHs [15-18]. The variation might be caused by the geographical conditions of the region where the study is conducted; feeding habits of the patients and racial differences. One common point in all studies conducted up to now is that they indicate basal ganglia and thalamic regions as the most common location for HT-induced SIHs. However, in our study, lobar region was the most common location with a rate of 48.5%, which was followed by thalamic and ganglia regions with degressive rates respectively. As opposed to literature, we observed thalamic hematomas in 50% of the patients who had no anticoagulant use but HT trouble in their case histories and lobar hematoma in the other half. Furthermore, 66.6% of six patients who had both anticoagulant use and HT in their case histories were observed to have lobar hematomas and the remaining ones to have thalamic and basal ganglia hematomas. Since brain CT has high diagnostic value in acute hemorrhages and is easily accessible, it is the gold standard method for diagnosis of SIH which itself is a kind of acute hemorrhage as well. However, in tumor and vascular malformation-induced hemorrhages, MRI could be used to explain the underlying causes. Since we excluded tumor and vascular malformation-induced hemorrhages from our study, we used only brain CT for diagnosis in all patients in the study.

The type of treatment in SIHs could be surgical (evacuation of hematoma via craniotomy or external ventricular drainage (EVD) or medical. The type of treatment varies depending on the age, GCS on admission, volume of hematoma, presence/ absence of intraventricular hemorrhage and location of hematoma. Several studies have stated that the volume of hematoma, presence/absence of intraventricular hemorrhage and location of hematoma are fairly significant forpatients’ prognosis [15,18-21]. In some studies, >30 ml hematomas were more effective on morbidity and mortality while in others presence/absence of intraventricular hemorrhage or location (thalamic and basal ganglia hematomas) of hematomas had more effect on them. The primary aim of medical treatment is to bring intracranial and cerebral perfusion pressures back to normal or at least near-normal values, to stabilize the vital signs of patients and to assure epileptic attack prophylaxis. Whereas, the primary aim of surgical treatment is to evacuate hematoma and to eliminate its pressure on surrounding parenchyma tissue and as a result to decrease intracranial pressure and reduce secondary cerebral damage. Ultimate aim of the both treatment types is to minimize morbidity and mortality. In our case study, 3 patients were applied hematoma evacuation via craniotomy; 4 patients were applied EVD and the others were followed up with medical treatment. The type of treatment was determined by the volume of hematoma, presence/absence of midline shift, neurologic state of the patient, regression in the presence of intraventricular hemorrhage and development hydrocephalus.

Many earlier studies have suggested that many SIHs have poor prognosis and the average mortality rate is in the range of 34-50% in SIHs regardless of the type of the treatment [15,19,21]. In our case serial, the average mortality rate was 45.5%, which was compatible with literature. While one of the 3 patients who had surgical treatment died, one of them was discharged with morbidity and one was discharged with full recovery. While all of 4 patients who were applied EVD died, only 10 out of 26 patients followed up with medical treatment died. In our case serial, the patients having >30 ml hematoma volume in thalamic and basal ganglia hematomas were observed to have higher morbidity and mortality rate. All the patients, regardless of outcome (full-recovery, morbidity, mortality), had both deep (basal ganglia and thalamic) and superficial (lobar) hematomas in terms of localization; >30 ml and <30 ml hematomas in terms of volume; present and absent of intraventricular hemorrhages. Age had no significant effect on morbidity, mortality or full-recovery. However, the patients discharged with full recovery were observed to have ≥ 12 GCS on admission while morbid or mortal patients had ≤ 11 GCS.

As a conclusion, it could be said that while hematoma volume, hematoma location and presence/absence of intraventricular hemorrhages have significant effect on morbidity and mortality in SIHs, the most significant factor is the patients’ GCS on admission. In our study, age had no significant effect on mortality and morbidity.

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