New Truncal Nerve Blocks for Thoracoscopic Surgery and Open Heart Surgery.

New Truncal Nerve Blocks for Thoracoscopic Surgery and Open Heart Surgery.

This study is divided to two sub-studies. First sub-study evaluates if Serratus Anterior Plane block (SAPB) reduces opioid consumption after thoracoscopic surgery. Secondly continuous SAPB is compared to continuous intercostal blockade. Second sub-study evaluates if Subpectoral Interfascial Plane block (SIP) reduces opioid consumption after medial sternotomy.

Serratus anterior plane block (SAPB) - sub-study

In this sub-study 120 patients will be randomly assigned to one of four groups:

SAPB group A 30ml of Ropivacaine 7,5mg/ml is injected above m. serratus anterior after thoracoscopic lung surgery. Injection is done under ultrasound guidance.

SAPB group B 30ml of Sodiumchloride 0.9 is injected above m. serratus anterior after thoracoscopic lung surgery. Injection is done under ultrasound guidance.

SAPB group C 30ml of Ropivacaine 7,5mg/m is injected above m. serratus anterior after thoracoscopic lung surgery. Also a multi-holed catheter is left in place. Through catheter 20ml Ropivacaine 2mg/ml is injected every 12 hours after surgery.

SAPB group D A multi-holed catheter is placed in single intercostal space under thoracoscopic visualization. 20ml of Ropivacaine 7,5mg/ml is injected after application of the catheter, also a continuous infusion of ropivacaine 2mg/ml is started. Rate of the infusion is determined by patients weight.

Subpectoral Interfascial Plane block (SIP) - sub-study

In this sub-study 80 patients will be randomly assigned to one of two groups:

SIP group A 20ml of ropivacaine 7,5mg/ml is injected under both pectoralis major muscles before medial sternotomy. Injection is done under ultrasound guidance.

SIP group B 20ml of sodiumchloride 0.9 is injected under both pectoralis major muscles before medial sternotomy. Injection is done under ultrasound guidance.

Every patients postoperative pain is treated with intravenous oxycodone PCA-pump.

The investigators will evaluate post operative pain based on the Numeric rating Scale, 24 hours oxycodone consumption. The investigators will also evaluate post operative chronic pain using three questionnaires: EQ5D, STAIT-TRAIT and Pain Detect. In SAPB sub-study the questionnaires are done three weeks and 6 months post. operatively. In SIP sub-study the questionnaires are done 6 months and 12 months post.operatively.

Inclusion Criteria:

• Elective thoracoscopic lung surgery or elective open heart valve surgery

Exclusion Criteria:

• DM1 with complications, lack of co-operation, refusal, chronic pain, chronic intake of opioids or use of SNRI or tricyclic antidepressants.