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Anesthetic management of patients undergoing extra-anatomic renal bypass surgery for renovascular hypertension


1 Department of Anesthesiology, PGIMER, Chandigarh, India
2 Campbellton Regional Hospital, Campbellton, NB, Canada
3 Department of Cardiothoracic and Vascular Surgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India

Correspondence Address:
Prabhat Kumar Sinha
Campbellton Regional Hospital, Campbellton, NB, E3N1R1
Canada
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-9784.81563

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Year : 2011  |  Volume : 14  |  Issue : 2  |  Page : 97-103

 

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Renal artery disease is the most common cause for surgically curable form of hypertension. In a small subset of patients with severe aortic disease where the aorta is not suitable for endovascular technique and to provide an arterial inflow, an extra-anatomic renal bypass surgery (EARBS) is an option. Anesthetic management of such procedures has not been described so far in the literature. We retrospectively analyzed the anesthetic techniques used in all patients who underwent EARBS between February 1998 and June 2008 at this institute. We also further analyzed data concerning blood pressure (BP) control and renal function response following surgery as outcome variable measures. A total of 11 patients underwent EARBS during this period. Five received oral clonidine with premedication. During laryngoscopy, esmolol was used in 4 patients, while lignocaine was used in remaining 7 patients. Of 11 patients, 7 showed significant hemodynamic response to laryngoscopy and intubation; among these, one had oral clonidine with premedicant, and 6 received lignocaine just before laryngoscopy. Intravenous vasodilators were used to maintain target BP within 20% of baseline during perioperative period. All patients received renal protective measures. During follow-up, 10% were considered cured, 70% had improved BP response, while 20% failed to show improvement in BP response. Renal functions improved in 54.5%, remain unchanged in 36.5%, and worsened in 9% of patients. Use of clonidine during premedication and esmolol before laryngoscopy were beneficial in attenuating hemodynamic response to laryngoscopy, while use of vasodilators to maintain target BP within 20% of baseline, and routine use of renal protective measures appear to be promising in patients undergoing EARBS.






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1 Department of Anesthesiology, PGIMER, Chandigarh, India
2 Campbellton Regional Hospital, Campbellton, NB, Canada
3 Department of Cardiothoracic and Vascular Surgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India

Correspondence Address:
Prabhat Kumar Sinha
Campbellton Regional Hospital, Campbellton, NB, E3N1R1
Canada
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-9784.81563

Rights and Permissions

Renal artery disease is the most common cause for surgically curable form of hypertension. In a small subset of patients with severe aortic disease where the aorta is not suitable for endovascular technique and to provide an arterial inflow, an extra-anatomic renal bypass surgery (EARBS) is an option. Anesthetic management of such procedures has not been described so far in the literature. We retrospectively analyzed the anesthetic techniques used in all patients who underwent EARBS between February 1998 and June 2008 at this institute. We also further analyzed data concerning blood pressure (BP) control and renal function response following surgery as outcome variable measures. A total of 11 patients underwent EARBS during this period. Five received oral clonidine with premedication. During laryngoscopy, esmolol was used in 4 patients, while lignocaine was used in remaining 7 patients. Of 11 patients, 7 showed significant hemodynamic response to laryngoscopy and intubation; among these, one had oral clonidine with premedicant, and 6 received lignocaine just before laryngoscopy. Intravenous vasodilators were used to maintain target BP within 20% of baseline during perioperative period. All patients received renal protective measures. During follow-up, 10% were considered cured, 70% had improved BP response, while 20% failed to show improvement in BP response. Renal functions improved in 54.5%, remain unchanged in 36.5%, and worsened in 9% of patients. Use of clonidine during premedication and esmolol before laryngoscopy were beneficial in attenuating hemodynamic response to laryngoscopy, while use of vasodilators to maintain target BP within 20% of baseline, and routine use of renal protective measures appear to be promising in patients undergoing EARBS.






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