Cerebral Autoregulation and CO2 Reactivity Before and After Elective Supratentorial Tumor Resection
| Autor: | Parmod K. Bithal, Rajendra S. Chouhan, Deepak Sharma, Monica S. Vavilala, Pimwan Sookplung, Hari Har Dash |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Adult
Male Middle Cerebral Artery medicine.medical_specialty Adolescent genetic structures health care facilities manpower and services medicine.medical_treatment Blood Pressure Hyperemia Cerebral autoregulation Neurosurgical Procedures Resection Young Adult Text mining Heart Rate health services administration Preoperative Care Homeostasis Humans Medicine Autoregulation Postoperative Period health care economics and organizations Craniotomy Supratentorial Tumors business.industry Supratentorial Neoplasms Carbon Dioxide Middle Aged Decompression Surgical Transcranial Doppler Surgery Co2 reactivity Anesthesiology and Pain Medicine Cerebrovascular Circulation Anesthesia Female Neurology (clinical) Blood Gas Analysis business Algorithms |
| Zdroj: | Journal of Neurosurgical Anesthesiology. 22:132-137 |
| ISSN: | 0898-4921 |
| Popis: | The effect of surgical decompression of tumor on autoregulation and CO2 reactivity is not known. We examined the effect of elective tumor resection on cerebral autoregulation and CO2 reactivity.Patients with supratentorial tumors undergoing elective craniotomy for tumor resection under standard anesthesia underwent cerebral autoregulation and CO2 reactivity testing immediately before and between 6 and 24 hours after surgery. Transient hyperemic response of the middle cerebral artery after the release of 10 second compression of the ipsilateral common carotid artery was used to calculate the transient hyperemic response ratio (THRR). THRR1.1 defined the normal autoregulation. Voluntary hyperventilation was titrated to reduce the ETCO2 by 10 mm Hg below baseline and CO2 reactivity was calculated.Thirty-five patients (26 male and 9 female) were studied. Overall, cerebral autoregulation was intact before and after tumor resection for the cohort (THRR 1.27+/-0.10 and 1.30+/-0.12, P=0.11). However, cerebral autoregulation was impaired preoperatively in 7 (20%) patients and remained impaired in all 7 patients after tumor resection. Larger tumor size (P=0.002), and midline shift more than 5 mm (P0.001) were associated with impaired cerebral autoregulation. Twenty-eight (80%) patients who had intact preoperative cerebral autoregulation maintained autoregulation postoperatively. CO2 reactivity was within normal limits before and after surgery in all patients and did not change between the 2 periods (3.41+/-0.46/mm Hg and 3.60+/-0.63%/mm Hg, P=0.07).Preoperative cerebral autoregulation was impaired in a significant number of patients with large supratentorial tumor size and midline shift more than 5 mm and was associated with postoperative impaired cerebral autoregulation during the first 24 hours after the surgery. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|