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12
ОРИГИНАЛЬНЫЕ СТАТЬИ
УДК 616.8-089: 616.231: 616-083.94
Iype Cherian, Hira Burhan
Nobel Institute of Neurosciences, Nobel Medical College and Teaching Hospital, Nepal
LATERAL POSITIONING TO PREVENT POST-EXTUBATION COMPLICATIONS IN NEUROSURGICAL PATIENTS WITH A MOTOR SCORE OF 5
Objective: Complications following extubation in neuro-intensive care units are high, particularly in patients with a motor score of 5. Maneuvers such as lateral position allow for a reduction in such complications by increasing airway and eliminating the need for re-intubation in such patients.
Methods: A prospective observational study was carried out between July and October 2018 in 110 patients admitted to the neuro-intensive unit with a motor score of 5. The incidence of post-extubation aspiration (PEA) characterized by fever with patches on chest x-rays and the need for re-intubation was noted and the difference was observed among the patients being positioned supine (n=50) vs those positioned laterally (n=60). Results: There was a significant decrease in the incidence of post-extubation aspiration in supine (44%, n=22/50) vs lateral position (20%, n=12/60), p=0.007. The incidence of fever with colonization seen in lower airways on x-ray in patients with supine position was 54% (n=27/50) vs 24% (n=15/60), p=0.002. A strong correlation was found between the duration of ICU stay and the development of PEA (R=0.757; P=0.000). Conclusion: Patients in neuro-intensive care with a motor score of 5 need to be strictly monitored for development of complications following extubation and maneuvers such as lateral positioning can be of benefit in preventing such complications. This study concludes that positioning of patients in a lateral direction has benefits of reducing the incidences of PEA and lower airway colonization in contrast to supine position. Keywords: neuro-intensive Care; Extubation; Lateral positioning.
Introduction.
Extubation is a critical step in optimum management of post-surgical and critically ill patients. Post extubation complications are not uncommon, particularly in neuro-intensive units with patients presenting with neuronal damage and impaired consciousness.
Laryngeal edema is perhaps the most commonly occurring complication following extubation and may often result in complete airway obstruction with an urgent need to re-intubation [1]. Other complications like PEP secondary to bacterial colonization in lower airways, have also been described in various intensive care settings. Perhaps the most important predictor of these complications is the motor score at the time of extubation. In patients with a motor score of 6, there is a good control of motor tone thereby decreasing chances of complications. In patients with much lower motor scores (4 and less) it is advised to continue intubation until further improvement ensues. What is of concern is to monitor the development of complications in patients with a motor score
of 5, where the post-extubation period should be carefully managed.
Studies report the incidence of supra and infra-glottic post-extubation aspiration (PEA) as one of the most commonly occurring complication in intensive care units. Longer duration of intubation and ICU stay, together with a depressed motor response contribute significantly to aspiration and later, pneumonia in these patients, only worsening the patient prognosis and outcomes. Positioning patients in lateral position after extubation has shown to reduce development of early complications. This maneuver prevents the tongue rolling and stimulates swallowing reflex through pyriform sinus, hence reducing chances of aspiration and subsequent pneumonia.
Methodology.
A prospective observational cohort was conducted for 3 months in a 35-bedded neuro-intensive care unit at the Nobel Institute of Neurosciences in Nepal. Inclusion criteria included all extubated patients in ICU with a motor score of 5 on GCS evaluation. Patients still intubated or with a motor score of 6 or 4
Iype Cherian, email: drrajucherian@gmail.com
(and less) were excluded. A total of 110 patients fulfilling the inclusion criteria were enrolled in the study. Out of these, 50 patients were kept in supine position post extubation (control group) and 60 were placed in a lateral position (study group). Both groups were observed and compared for any differences in incidence of PEA as characterized by fever and colonization in lower airways, as well as any need for re-intubation. Any correlations with the length of ICU stay and incidence of PEA were also studied for further information.
Data was analyzed using SPSS software. A chi-square test was performed to assess any significant differences between the two groups, and to evaluate the association of duration of ICU stay with the occurrence of PEA
Results:
Out of 110 patients, 73 were males, with a mean age of 39.70 and 37 were females, mean age 40.78. The control group comprised 50 patients fulfilling the inclusion criteria positioned in a supine position post-extubation. The study group comprised 60 patients placed laterally post-extubation.
The frequency of fever with colonization in lower airways as seen by chest x-ray was 27 in control group vs 15 in the study group. The difference was statistically significant (p=0.002). Of the 27 patients with fever and colonization of lower airways in the control group, 22 developed post-extubation pneumonia, similarly, 12 out of the 15 patients with fever and colonization of lower airways in the study group developed PEA [FIGURE 1].
Figure 1 - Incidence of PEA, Fever and re-intubation as compared in supine (control group)
and lateral (study group) positions
A strong linear correlation was found between the incidence of fever with lower airway colonization and the development of post-extubation pneumonia (R=0.770), and the difference in PEA development in the two groups was statistically significant (p=0.007). The impact of the duration of ICU days was also associated significantly with development of PEA in both
groups (R=0.757). Patients admitted for less than 24 hours had almost no incidence of PEA, whereas the frequency increased in patients admitted for 24-48 hours (44.12%) and more than 48 hours (52.94%); the results were statistically significant (p=0.000) [FIGURE 2].
Figure 2 - Duration of ICU stay and development of Post-Extubation Aspiration (PEA)
Discussion
Complications arising during and after extubation periods in intensive care units are not uncommon. Endotracheal intubation can cause damage and ulceration of the mucosa lining the oropharynx, larynx and trachea, in almost all patients intubated for 4 days or more [2]. As a result, extensive laryngeal edema causes airway obstruction after extubation, characterized by dysphagia and stridor, and more often aspiration of swallowed contents into the respiratory tracts. Various risk factors play an important role in the development of laryngeal edema and post-extu-bation stridor. A predisposition to female gender has been hypothesized due to the female mucous membrane being less resistant to trauma and thinner than that in men [3]. However, some there is not much evidence to establish this correlation. Another important risk factor is the duration of intubation which has been identified by Kastanos and colleagues and by Esteller and colleagues [4, 5, 6] as a potent risk factor for laryngeal edema development.
Post-extubation pneumonia (PEP) has been regarded as one of the most dreaded an common complications arising in patients admitted to critical care units. A wide variation has been recorded by me-ta-analysis of various studies, with the incidence of PEP between 3% and 62% [7]. This difference can be attributed to the lack of availability of data in various centers. Nevertheless, the development of PEP always remains a challenge and a threat to patient prognosis in intensive care units.
Twenty-four hours of tracheal intubation and mechanical ventilation in semi-recumbent position can lead to significant pathogenic colonization of the
lower airways, even without any clinical signs which can promote the development of PEP [8]. Oropharyngeal contamination of the lower airways is the most important route of colonization, by potential pathogenic microorganisms, including a high load of anaerobic bacteria entering lower airways at different time intervals from the insertion of an endotracheal tube [9, 10].
Traumatic brain injury often results in peripheral and bulbar nerve damage, altering cognition, or causing the dysregulation of the swallowing reflex [11]. It is a significant predictor of silent aspiration after prolonged intubation [12] and inevitably increases the prevalence of post-extubation complications in neuro-intensive care units. Strategies directed to prevent pathogenic microbiological colonization before and after mechanical ventilation should be considered in order to avert the onset of PEP [13].
Identifying and addressing potential risk factors leading to development of PEP may of help in preventing incidences. Early extubation will decrease chances of colonization by pathogens originating from tubes. Tube size has also been considered as potential risk factor, and intubation with a 7 or 7.5 mm tube in males and a 6.5 mm tube in females has shown efficacy in preventing mucosal damage, however, there have been reports on delayed weaning after usage of smaller tubes [14]. Likewise, a small bore of nasogastric tube may also decrease the risk of PED [15].
Meta-analyses have also shown that pre-emptive administration of a multiple-dose regimen of glu-co-corticosteroids can reduce the incidence of laryn-geal edema and subsequent reintubation while some studies suggest that Corticosteroids should be given
only to patients at high risk of reintubation [16, 17]. In fact, corticosteroid administration before extubation is part of the extubation protocol in some centers [18].
With continued incidences of post-extubation-al complications, particularly after traumatic brain injury, current treatments are now focusing on dietary modifications and postural changes/compensatory maneuvers rather than interventions [19]. It is observed that positioning patients laterally during during surgical procedure under general anesthesia prevents respiratory occlusion, and this observation has led to an emerging protocol for patient positioning at the time of extubation [20, 21]. Head rotation induces the bolus to pass through the pyriform sinus on the opposite side to reach the esophagus. As a result, the bolus passes via the healthy side, bypassing the damaged side of the pharynx and pyriform sinus, and more efficient swallowing is enabled. Patients whose pharynx are more paralyzed on either side can turn their head toward the paralyzed side
to narrow the piriform fossa on the paralyzed side or use the force of gravity from a side-lying or recumbent position to guide a food bolus to the non-paralyzed side [22].
This technique has been reported to be particularly effective in dysphagic patients, in particular, a motor score of 5 on Glasgow Coma Scale, accompanied with unilateral paralysis of the pharynx, larynx, and vocal cords, and those with nerve paralysis in similar regions [23]. Conclusions:
The observations made in this study show a significantly decreased incidence of PEP as characterized by fever and consolidation of lower airways, particularly in patients admitted for more than 24 hours in a neuro-intensive care unit. Patients extubated at a motor score of 5 should be positioned laterally (with head turned towards the weaker side) to avoid aspiration and resultant pneumonia.
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lype Cherian, Hira Burhan
Нобель нейрогылым институты, Нобель медициналык колледжа мен оку ауруханасы, Непал
КОЗГАЛЫС ЖАУАБЫ 5 БАЛЛГА ТЕЦ НЕЙРОХИРУРГИЯЛЫК, НАУКДСТАРДАГЫ ЭКСТУБАЦИЯДАН КЕЙ1НГ1 АСКЫНУЛАРДЬЩ АЛДЫН АЛУ УШ1Н Б1Р БУЙ1РГЕ ЖАТКЫЗУ
Мацсаты.
Нейрокаркынды терапия бeлiмшелерiнде эк-стубациядан кейнп аскыну жаFдайлары, adpeœ, KозFалыс жауабы 5 баллFа тек наукастарда ете жи кездеседК Бiр 6Y^pre жаткызу сиякты эрекет ты-ныс алу жолдарын кекейту жэне осы пациенттер-ге кайта интубациялау кажеттттн жою аркылы осындай аскынуларды тeмендетуi MYMKrn. ddkmepL
2018 жылдык шнлде айынан казан айына дейiн нейроинтенсивт бeлiмге кабылданFан козFалыс жауабы 5 баллFа тек 110 наукас бойынша пер-
спективалык байкаушы зерттеу жYргiзiлдi. Кеуде радиографиясынык дактары бар ауыткулармен сипатталатын экстубациядан кейiнгi аспирация-нык жиiлiгi жэне кайта интубация кажетттт бай-калды; шалкасынан жаткан наукастар арасында (n = 50) жэне бYЙiрiнде жаткан наукастардык арасында (n=60) айырмашылык байкалды. Нэтижелери
БYЙiрге жаткызумен (20%, n=12/60), p=0.007 са-лыстырFанда, шалкасынан жату кезндеп экстубациядан кейн (44%, n=22/50) аспирация жиiлiгiнiк айтарлыктай тeмендеуi байкалды. Шалкасынан
НЕЙРОХИРУРГИЯ И НЕВРОЛОГИЯ КАЗАХСТАНА
№4(53) 2018
жаткан наукастардык рентгенограммасында TeMeHri тыныс алу жолдарында байкалFан безгек-тщ жиiлiгi 54% (n=27/50), бYЙiрiнде жаткандарда 24% (n=15/60), p=0.002 болды. Каркынды терапия бeлiмшелерiнде (КТБ) болу узакты^ы мен eкпелiк тромбэндартерэктомиянык (Р=0,757, Р=0,000) да-муы арасында мыкты корреляция байкалды. Цорытынды.
Нейрокаркынды терапия бeлiмшесiндегi козFа-лыс жауабы 5 баллFа тек наукастар экстубациядан
кейiнгi аскынулардык дамуына катан бакылануы керек, бул ретте бYЙiрiне жаткызу сиякты маневр-лер мундай аскынуларды болдырмауFа кемек-тесуi MYMкiн. Бул зерттеуде пациенттердi бYЙiрi-не жаткызудык екпе тромбэндартерэктомиясын азайту жэне тыныс алу жолдарынык колониза-циясын темендету сиякты артыкшылыктарFа ие екендiгi жeнiнде корытынды жасалды. Нег1зг1 свздер: нейрокаркынды терапия, экстуба-ция, бiр бYЙiрге жаткызу.
Iype Cherian, Hira Burhan
Нобелевский институт нейронаук, Нобелевский медицинский колледж и учебная больница, Непал
ПОЛОЖЕНИЕ ЛЕЖА НА БОКУ КАК ПРОФИЛАКТИКА ПОСТ-ЭКСТУБАЦИОННЫХ ОСЛОЖНЕНИЙ У НЕЙРОХИРУРГИЧЕСКИХ БОЛЬНЫХ С ДВИГАТЕЛЬНЫМ ОТВЕТОМ 5 БАЛЛОВ
8
Цель.
Случаи осложнения после экстубации в отделении нейроинтенсивной терапии встречаются очень часто, особенно у пациентов с двигательным ответом 5 баллов. Такие манипуляции, как расположение пациента на боку, позволяют уменьшить подобные осложнения путем расширения дыхательных путей и устранения необходимости повторной интубации у пациентов.
Методы.
Проспективное обсервационное исследование было проведено в период с июля по октябрь 2018 года у 110 пациентов, поступивших в нейро-интенсивное отделение с двигательным ответом 5 баллов. Частота постэкстубационной аспирации (PEA), характеризующейся лихорадкой с пятнами на рентгенограмме груди и необходимость повторной интубации была отмечена, и наблюдалась разница между пациентами, находящимися в положении лежа на спине (n = 50), и пациентами находящимися в положении на боку (n=60). Результаты.
Наблюдалось значительное снижение частоты аспирации после экстубации в положении лежа
на спине (44%, п=22/50) по сравнению с боковым положением (20%, п=12/60), р=0,007. Частота лихорадки с колонизацией, наблюдаемой в нижних дыхательных путях на рентгенограмме у пациентов с положением на спине, составила 54% (п=27/50) против 24% (п = 15/60), р=0,002. Была обнаружена сильная корреляция между продолжительностью пребывания в отделении интенсивной терапии (ОИТ) и развитием лёгочной тромбэндартерэкто-мии ^=0,757; Р=0,000).
Заключение.
Пациенты нейроинтенсивной терапии с двигательным ответом 5 баллов должны строго контролироваться для развития осложнений после экстубации, и маневры, такие как боковое позиционирование, могут быть полезны для предотвращения таких осложнений. В этом исследовании делается вывод о том, что расположение пациентов на боку имеет преимущества, заключающиеся в уменьшении числа случаев лёгочной тромбэндартерэкто-мии и снижении колонизации дыхательных путей в отличие от положения лежа на спине.
Ключевые слова: нейроинтенсивная терапия, экстубация, боковое позиционирование.
