Effects of Backrest Position on Central Venous Pressure and Intracranial Pressure in Brain Surgery Patients

2006 ◽  
Vol 36 (2) ◽  
pp. 353
Author(s):  
Hyun Ju Kim ◽  
Kyeong Yae Sohng
Keyword(s):  
Intracranial Pressure ◽  
Central Venous Pressure ◽  
Venous Pressure ◽  
Brain Surgery ◽  
Central Venous

scholarly journals Prospective Study of Central Venous Pressure Trends during Major Neurosurgical Procedures in an Elective Operation Theatre Setting of a Tertiary Care Centre

2021 ◽  
Vol 8 (07) ◽  
pp. 369-373
Author(s):  
Rajeev Damodaran Sarojini ◽  
Sanjay Sahadevan ◽  
Jayakumar Christhudas
Keyword(s):  
Blood Pressure ◽  
Intracranial Pressure ◽  
Prospective Study ◽  
Central Venous Pressure ◽  
Inferior Vena ◽  
Venous Pressure ◽  
Ultra Sound ◽  
Neurosurgical Procedures ◽  
Central Venous ◽  
Intraoperative Period

BACKGROUND There are extensive variations in central venous pressure during intraoperative period of a major neurosurgical patients. Monitoring of central venous pressure is vital for guiding the administration of fluids, blood and blood products. Central venous pressure (CVP) also measures the intracranial pressure indirectly. Increased intracranial pressure thereby reduces the cerebral blood flow, leading to cerebral ischemia. METHODS This is a prospective study where 25 major neurosurgical cases posted for elective major neurosurgery were selected. Right subclavian vein was selected for cannulation, by blind technique in all these cases. CVP was recorded every 15 minutes. Central venous catheter was connected to a pressure transducer linked to a multichannel monitor; zeroing was done and the CVP reading obtained. RESULTS Central venous pressure reading was done serially and showed the trends in haemodynamics in various stages of surgery. Initial intraoperative periods showed lower values due to intravenous (I / V) induction of anaesthesia, use of mannitol and diuretics. Later on, the trends changed to higher side subsequent to administration of fluids and blood as required. CONCLUSIONS Monitoring of CVP is an important component of haemodynamic monitoring along with non-invasive blood pressure (NIBP), intra-arterial blood pressure (IABP), and urine output. Central venous pressure can be used to aspirate an air embolism occurring during the intraoperative period after employing Durant’s position. KEYWORDS CVP, NIBP , USS – Ultra Sound Scan, IVC – Inferior Vena Cava, IVCCI – Inferior Vena Cave Collapsibility Index, PEEP – Positive End Expiratory Pressure, C / L – Central Line, IABP.

scholarly journals Functional relationship of arterial blood pressure, central venous pressure and intracranial pressure in the early phase after subarachnoid hemorrhage

2021 ◽  
pp. 1-14
Author(s):  
Gabriela Maissen ◽  
Gagan Narula ◽  
Christian Strässle ◽  
Jan Willms ◽  
Carl Muroi ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Subarachnoid Hemorrhage ◽  
Intracranial Pressure ◽  
Central Venous Pressure ◽  
Arterial Blood Pressure ◽  
Functional Relationship ◽  
Venous Pressure ◽  
Correlation Coefficients ◽  
Central Venous ◽  
Arterial Blood

BACKGROUND: Intracranial pressure (ICP) and arterial blood pressure (ABP) are related to each other through cerebral autoregulation. Central venous pressure (CVP) is often measured to estimate cardiac filling pressures as an approximate measure for the volume status of a patient. Prior modelling efforts have formalized the functional relationship between CVP, ICP and ABP. However, these models were used to explain short segments of data during controlled experiments and have not yet been used to explain the slowly evolving ICP increase that occurs typically in patients after aneurysmal subarachnoid hemorrhage (SAH). OBJECTIVE: To analyze the functional relationship between ICP, ABP and CVP recorded from SAH patients in the first five days after aneurysm. METHODS: Two methods were used to elucidate this relationship on the running average of the signals: First, using Spearman correlation coefficients calculated over 30 min segments Second, for each patient, linear state space models of ICP as the output and ABP and CVP as inputs were estimated. RESULTS: The mean and variance of the data and the correlation coefficients between ICP-ABP and ICP-CVP vary over time as the patient progresses through their stay in the ICU. On average, after an SAH event, the models show that a) ABP is the bigger driver of changes in ICP than CVP and that increasing ABP leads to reduction in ICP and (b) increasing CVP leads to an increase in ICP. CONCLUSIONS: Finding a) agrees with the hypothesis that patients with subarachnoid hemorrhage have defective autoregulation, and b) agrees with the positive correlation observed between central venous pressure and intracranial pressure in the literature.

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