The ethics of anaesthesia learning curves

A retrospective observational study of patient analgesia outcomes when regional anaesthesia procedures are performed by consultants versus supervised trainees

At teaching hospitals, consultants must provide effective supervision, including appropriate selection of teaching cases, such that the outcomes achieved by trainees are similar to that of consultants. Numerous studies in the surgical literature have compared patient outcomes when surgery is performed by consultant surgeons or surgical trainees but, to our knowledge, none exist in the field of anaesthesia. We aimed to compare analgesia outcomes of regional anaesthesia when performed by supervised trainees versus consultants. We designed a retrospective observational study using registry data. The primary outcome was inadequate analgesia, defined as a numerical rating scale (NRS) for pain >5 reported at any time in the post-anaesthesia care unit (PACU). Secondary outcomes included the maximum pain NRS, pain experienced in the PACU, and the requirement for systemic opioid analgesia in the PACU. Of the 1814 patients analysed, the primary proceduralist was a consultant for 514 (28.3%) patients and a trainee for 1300 (71.7%) patients. All trainees were supervised by an on-site consultant. There were no statistically significant differences between consultants and supervised trainees in terms of the primary outcome (NRS >5 in 24.9% and 24.5% of patients, respectively; P = 0.84) and secondary outcomes. Compared to trainees, consultants had a slightly higher rate of patients with a body mass index >30 kg/m², an American Society of Anesthesiologists Physical Status Classification of 3 or 4, nerve blocks performed under general anaesthesia, paravertebral/neuraxial blocks and blocks with perineural catheter placement. Regional anaesthesia performed by supervised trainees can achieve similar analgesia outcomes to consultant-performed procedures.

The Key Parts of Hip Arthroscopy for Femoroacetabular Impingement Syndrome: Implications for the Learning Curve

Background:

Hip arthroscopy is a rapidly growing surgical approach to treat femoroacetabular impingement (FAI) syndrome with a significant learning curve pertaining to complication risk, reoperation rate, and total hip arthroplasty conversion. Hip arthroscopy is more frequently being taught in residency and fellowship training. The key, or critical, parts of the technique have not yet been defined.

Purpose:

To identify the key components required to perform arthroscopic treatment of FAI syndrome.

Study Design:

Consensus statement.

Methods:

A 3-question survey comprising questions on hip arthroscopy for FAI was sent to a convenience sample of 101 high-volume arthroscopic hip surgeons in the United States. Surgeon career length (years) and maintenance volume (cases per year) were queried. Hip arthroscopy was divided into 10 steps using a Delphi technique to achieve a convergence of expert opinion. A step was considered “key” if it could (1) avoid complications, (2) reduce risk of revision arthroscopy, (3) reduce risk of total hip arthroplasty conversion, or (4) optimize patient-reported outcomes. Based on previous literature, steps with >90% of participants were defined as key. Descriptive and correlation statistics were calculated.

Results:

A total of 64 surgeons (63% response rate) reported 5.6 ± 2.1 steps as key (median, 6; range, 1-9). Most surgeons (56.3%) had been performing hip arthroscopy for >5 years. Most surgeons (71.9%) had performed >100 hip arthroscopy procedures per year. Labral treatment (97% agreement) and cam correction (91% agreement) were the 2 key steps of hip arthroscopy for FAI. Pincer/subspine correction (86% agreement), dynamic examination before capsular closure (63% agreement), and capsular management/closure (63% agreement) were selected by a majority of respondents but did not meet the study definition of key. There was no significant correlation between surgeon experience and designation of certain steps as key.

Conclusion:

Based on a Delphi technique and expert opinion survey of high-volume surgeons, labral treatment and cam correction are the 2 key parts of hip arthroscopy for FAI syndrome.

A low cost, high fidelity nerve block model

Background

We have constructed a simple, inexpensive simulation model for ultrasound guided nerve blocks. To date there are no low cost, high fidelity models for nerve block simulations. The models that do exist are expensive and vaguely resemble actual anatomy. As ultrasound guided nerve blocks become more common in medical education it is essential to develop better training models to help increase the comfort level of the individual provider and increase the chances for success during live-patient procedures [Anaesth Intensive Care 37: 824-829, 2009].

Methods

The nerve block model was produced with a single pork loin with pressure-injected ultrasound gel through both CAT 5 cable and IV tubing inserted length-wise into the pork loin.

Results

Our nerve block model had a realistic, life-like feel simulating human tissue.

Conclusion

This ultrasound nerve block model was inexpensive with life-like feel allowing resident trainees to develop more confidence and tactile skill to increase the chance for success.

Anaesthesia trainees' exposure to regional anaesthesia in an Australian tertiary adult teaching hospital

The purpose of this study was to quantify the exposure of anaesthetic trainees to regional anaesthesia in an Australian tertiary adult teaching hospital. We reviewed data collected on all regional blocks performed by the anaesthetic department over a two-year period. The data was then broken down to give an estimate of the number of each block performed by each training year group. There was an average of 27.7 full-time equivalent trainees attached to the department. Trainees performed a total of 1374 blocks over this period. The average number of blocks performed by basic training year one trainees each year was 6.5, basic training year two trainees 13.5, advanced training year one trainees 14.9, advanced training year two trainees 19.1, advanced training year three trainees 23.1 and regional fellows 144.0. The number of total blocks and the proportion of advanced blocks increased with increasing level of training while supervision declined. Trainees in the two regional fellowship positions (7% of the trainee pool) performed 42% of the 1374 blocks. Factors that may influence the exposure of trainees to regional anaesthesia and the assessment of competency are considered.

Adverse events associated with regional ophthalmic anaesthesia in an Australian teaching hospital

This study prospectively audited 3339 peribulbar and 2688 sub-Tenon's eye blocks in an Australian teaching hospital with regard to the occurrence of adverse events. Complications were classified into three groups: ocular complications directly due to the eye block technique, systemic medical complications possibly associated with block technique and adverse events which were unlikely to have been associated with block technique. Five serious ocular complications were associated with peribulbar block compared to none with sub-Tenon's block (P = 0.07).

Achieving change in practice by using unembalmed cadavers to teach ultrasound-guided regional anaesthesia

We are at risk of teaching our trainees to be ‘image-seekers’. Sonoanatomy is easily demonstrated but teaching the practical skills of ultrasound-guided nerve block constitutes a greater challenge. Participants may return to their institutions after attending educational courses as proficient ‘image-seekers’, yet still unsure about performing nerve blocks. Safe ultrasound-guided regional anaesthesia (USGRA) requires integration of several skills. These are correct image acquisition, accurate needle guidance and appropriate spread of local anaesthesia. Most educational courses cannot combine all these skills. We describe realtime nerve blocks on cadavers to teach USGRA. Unembalmed cadavers offer more realistic imaging and tactile needle feedback than other models. We evaluated participants' perceptions of cadavers for training, their impact on confidence and whether subsequent change in practice occurred. Fifty participants completed pre- and post-training questionnaires and were followed up at three months. Confidence was scored on a five-point scale. Complete data-sets were received from 42 participants (84%). Most (98%) found the cadavers to be of educational benefit and 86% found the imaging and tissue properties comparable to clinical practice. Mean (±SD) confidence score increased from 1.7 (±0.92) precourse to 4.3 (±0.65) postcourse ( P < 0.0001). At three-month follow-up, 84% considered they had received sufficient training to introduce ultrasound into their clinical practice and 87% (27% precourse) now used ultrasound routinely. Only four participants had not made a change to their practice.