The Effects of Scalp Block on Haemodynamic Response and Postoperative Pain in Posterior Fossa Surgery

The Effects of Scalp Block on Haemodynamic Response and Postoperative Pain in Posterior Fossa Surgery

This study evaluate the effects of scalp block versus local infiltration on haemodynamic response to head pin replacement and skin incision and postoperative analgesia in posterior fossa surgery

In this study 15 patients will receive scalp block with bupivacaine, 15 patients will receive local infiltration with bupivacaine and 15 patients will receive placebo before surgery. The haemodynamic response to head pin replacement and skin incision will be recorded. Postoperatively all patients will have a patient controlled analgesia (PCA) device containing morphine (1 mg/ml) for analgesia. Visual analogue scale (VAS) for pain evaluation, sedation scores, and also postoperative morphine consumption will be evaluated and recorded.

In this arm, after general anesthesia, before surgery and head pin placement, scalp block will be applied. Scalp block will be performed with bupivacaine (Marcaine 5 mg/mL, 0,5% bupivacaine); nervus supraorbitalis, nervus supratrochlearis, n. auriculotemporalis, nervus zygomaticotemporalis, nervus occipitalis majoris and minoris will be bilaterally blocked with 2-3 ml bupivacaine.

In this arm, after general anesthesia, before surgery, 20 ml 0,5% bupivacaine (Marcaine 5 mg/ml, 0,5% bupivacaine) will be infiltrated to head pin points and skin incision area.

End of the surgery all of the patients in 3 groups will receive morphine patient controlled analgesia (PCA) including 1mg/ml morphine. The PCA was set to administer a bolus dose of 1 mg on demand with a lockout period of 10 minutes and maximum 25 mg for 4 hours.

heart rates (beats per minute) will be recorded before induction, before block, before head pinning, head pinning, head pin 5. and 10. minutes, skin incision

Systolic arterial pressures (mmHg) will be recorded in before induction, before block, before head pinning, head pinning, head pin 5. and 10. minutes, skin incision

Diastolic arterial pressures (mmHg) will be recorded before induction, before block, before head pinning, head pinning, head pin 5. and 10. minutes, skin incision

Mean arterial pressures (mmHg) will be recorded in will be recorded before induction, before block, before head pinning, head pinning, head pin 5. and 10. minutes, skin incision

Inclusion Criteria: Posterior fossa surgery Preoperative GlasGow Coma Score: 15/15 Exclusion Criteria: Allergy to bupivacaine Uncontrolled hypertension Coagulopathy Cerebrovascular disease Earlier craniotomy

Geze S, Yilmaz AA, Tuzuner F. The effect of scalp block and local infiltration on the haemodynamic and stress response to skull-pin placement for craniotomy. Eur J Anaesthesiol. 2009 Apr;26(4):298-303. doi: 10.1097/EJA.0b013e32831aedb2.

Hansen MS, Brennum J, Moltke FB, Dahl JB. Pain treatment after craniotomy: where is the (procedure-specific) evidence? A qualitative systematic review. Eur J Anaesthesiol. 2011 Dec;28(12):821-9. doi: 10.1097/EJA.0b013e32834a0255.

Verchere E, Grenier B, Mesli A, Siao D, Sesay M, Maurette P. Postoperative pain management after supratentorial craniotomy. J Neurosurg Anesthesiol. 2002 Apr;14(2):96-101. doi: 10.1097/00008506-200204000-00002.

Jellish WS, Leonetti JP, Sawicki K, Anderson D, Origitano TC. Morphine/ondansetron PCA for postoperative pain, nausea, and vomiting after skull base surgery. Otolaryngol Head Neck Surg. 2006 Aug;135(2):175-81. doi: 10.1016/j.otohns.2006.02.027.

Irefin SA, Schubert A, Bloomfield EL, DeBoer GE, Mascha EJ, Ebrahim ZY. The effect of craniotomy location on postoperative pain and nausea. J Anesth. 2003;17(4):227-31. doi: 10.1007/s00540-003-0182-8.

Schessel DA, Nedzelski JM, Rowed D, Feghali JG. Pain after surgery for acoustic neuroma. Otolaryngol Head Neck Surg. 1992 Sep;107(3):424-9. doi: 10.1177/019459989210700314.