View clinical trials related to Anesthesia; Functional.
Filter by:Major abdominal surgery - like non-laparoscopic bowel resection, liver, gastric, or pancreas surgery - is performed under general anesthesia. Pain control for after the surgery can be achieved purely with intravenous and oral pain medication or in combination with freezing of the nerves. Nerve freezing (nerve block) placed before surgery has the potential to substantially reduce the amount of inhaled anesthetic given to the patient during surgery. This can benefit the patient with being more awake and crisp more quickly after surgery. It can also reduce cost to the system. A further benefit which has received very little attention so far, is that reducing the amount of inhaled anesthetic given also lowers the environmental footprint created by the anesthetic. The investigators of the proposed study plan to quantify the amount of inhaled anesthetic used for each case and will compare how the consumption is affected by whether the epidural block is applied before or after surgery. Patients will have a nerve block catheter (epidural catheter) placed prior to the induction of general anesthetic by an experienced regional anesthesiologist. The epidural catheter will be bolused with a solution to which the anesthesiologist is blinded which will either be local anesthetic or dextrose (sham). The general anesthetic will be conducted according to a the protocol with the aim of maintaining a standard anesthetic depth monitored by patient state index (PSI). Measurements of the MAC-Value (minimum alveolar concentration) of inhaled anesthetic will be recorded every five minutes and will be noted down by a blinded observer. At the end of the case the anesthesiologist blinded to the solution will inject another solution (now a dextrose (sham) or local anesthetic before the patient is woken up.
There is currently no standard of care or best practice for managing post-operative pain for patients undergoing hip arthroscopy. Perioperative pain with these procedures can be substantial. It has been shown that up to 90% of patients in the Post-anesthesia care unit (PACU) following hip arthroscopy report pain scores of 7/10. Poor pain management following hip fracture surgery directly results in increased time spent in high cost health care areas and delayed time to ambulation. Continuous regional anesthesia following hip arthroplasty has been shown to reduce narcotic consumption and related side-effects (reduction of post-operative pain, delirium, and length of stay). The purpose of this research is to evaluate the effectiveness of a fascia iliaca nerve block in reducing post-operative pain within the first 24 hours following hip arthroscopy. Additionally, the pharmacokinetics of the drug ropivacaine will be studied via laboratory analysis of blood samples. Ultimately, the objective of this research is to develop a standard of care or best practice for the management of post-operative pain following hip arthroscopy. This study will include the entire age range of patients who are seen for hip arthroscopy at Boston Children's Hospital, for which there is a 35 year age limit. Both sexes will be included in the study. The study design will be real catheter versus a sham catheter(control). All subjects will receive general anesthesia. The catheters (real or sham) will be administered after the induction of general anesthesia and before the beginning of the surgery until 24 hours after recorded PACU admittance time. The anesthesia team placing the block will not be blinded. The orthopaedic surgeon (Dr. Yen) and all evaluators will be blinded to the absence or presence of a real catheter. In the case of a sham catheter, the anesthesia team will rig a pump to look like it is dispensing local anesthesia. To determine the pharmacokinetics of ropivicaine during standard fascia iliaca block, following induction of general anesthesia, a large bore IV catheter will be inserted for the purpose of blood draws (all patients).