Defensive Anaesthesia: Myth or Necessity?
Anaesthesiology is a profession where we deal with life and critical situations on a regular basis — in operation theatres and while performing non-operative room anaesthesia in hospital. The stressful workplace and burnout during saving patients' lives result in great mental and physical overload too.
Initially the term derived as DM (Defensive Medicine) — that protects doctors from legal liability. The fear of exposure to future medical litigation claims could lead physicians to practice Defensive Medicine. This term was coined in medical research in the United States in the 1960s–1970s.
I wonder whether this is a necessity or myth, but to a certain extent it may be true due to different reasons — though certainly not true 100%. Let us see the different perspectives while viewing it as a necessity.
It may manifest in the form of extra tests, procedures, or visits, or in the form of avoiding high-risk patients or procedures, primarily — but not necessarily or solely — to reduce exposure to malpractice liability.
What is Positive Defensive Medicine?
When physicians order extra tests or procedures primarily to reduce malpractice liability, they are practising Positive DM (assurance behaviour).
What is Negative Defensive Medicine?
Avoidance behaviour indicates obstructing the best possible treatment by either refusing to treat risky patients or resorting to patients' referral to other clinicians. Both DM and malpractice allegations are known as one of the causes of increasing healthcare costs.
Anaesthesia practice has also acquired the term "Defensive Anaesthesia", which stands on similar grounds as Defensive Medicine. Egypt was known to be the best example of DM practice, though no previous study had investigated DM behaviours among Egyptian anaesthesiologists.
Most healthcare professionals practise DM unintentionally without considering the legal consequences. As anaesthesiology carries inherent high risks related to airway, cardiac, and neurological functions, the fear of litigation often drives practitioners to alter their clinical decisions.
The Two Types of Defensive Anaesthesia
1. Positive (Assurance) Defensive Anaesthesia
This involves ordering extra, often clinically unjustified, tests, consultations, or prescribing extra medications to deter potential legal action. Examples include:
- Over-monitoring: Using complex or invasive monitoring equipment for low-risk procedures.
- Hyper-documentation: Spending disproportionate time over-emphasising lengthy informed consent forms or exhaustive charting solely for legal protection.
- Unnecessary Consults: Referring patients to other specialists even when the anaesthesiologist is fully capable of assessing the risk.
2. Negative (Avoidance) Defensive Anaesthesia
This occurs when a clinician actively avoids or obstructs potentially necessary care to minimise legal risk. Examples include:
- Patient Avoidance: Refusing to administer anaesthesia to high-risk patients (e.g., those with severe underlying comorbidities) who might be the most in need of surgery.
- Procedure Avoidance: Avoiding complex, specialised, or high-risk anaesthetic techniques that could be the most effective for a patient.
Is Defensive Anaesthesia Legally Required?
No, defensive anaesthesia is not legally required. In fact, "defensive medicine" — the practice of ordering tests, prescribing extra medications, or performing procedures primarily to protect against potential malpractice lawsuits rather than for the patient's benefit — is generally not recognised as a valid legal defence.
Legally, anaesthesiologists are required to provide the accepted standard of care that a reasonably prudent and qualified practitioner would deliver under similar circumstances.
While defensive interventions are not mandated by law, the reality of medical malpractice litigation has led many anaesthesiologists to adopt specific "defensive" practices. The practice is influenced by a complex interplay of factors including the legal environment, clinical uncertainty, and risk management. It represents a significant burden on healthcare systems, leading to resource waste, potential patient harm from over-diagnosis, and moral distress among health professionals.
Egyptian Study Findings
- Positive Defensive Anaesthesia: 100% prevalence
- Most reported Negative Defensive Anaesthesia: 91.3%
- Least reported Negative behaviour — Avoiding critical patients: 58.8%
Indian Scenario
Specific national percentage data tracking the exact overall prevalence of defensive anaesthesia practices in India is limited, but regional studies and national surveys highlight related metrics. For instance, 42% of respondents in a nationwide survey by the Indian Society of Anaesthesiologists reported performing over 60% of surgeries under regional anaesthesia — often driven by safety and risk-reduction choices. We need more surveys for percentage calculation in the Indian scenario.
Impact on Professional Wellbeing and Patient Outcomes
- Professional Wellbeing: Egyptian studies indicate that high levels of defensive medical practice are associated with increased anxiety among clinicians and can negatively impact the physician–patient relationship, potentially reducing provider empathy and patient satisfaction.
- Physiological Stress: Deviating from individualised anaesthetic depths can increase the burden on the cardiovascular and respiratory systems, potentially leading to fluctuations in blood pressure or longer recovery times.
- Impact on Recovery Outcomes: Research continues to explore how different anaesthetic techniques and depths affect physiological systems like cellular immunity — particularly regarding its potential influence on long-term recovery for patients with complex health histories.
- Procedural Risks: Opting for less tailored approaches can sometimes increase the risk of standard complications, such as respiratory challenges related to prolonged mechanical ventilation or immobility-related risks like deep vein thrombosis.
The Indian setup holds the same perspective, but regional anaesthesia has taken the lead in performing critical cases as per clinical need.
Systemic and Professional Impact
While defensive anaesthesia helps mitigate the legal anxiety of the practitioner, it has notable drawbacks for the healthcare system as a whole:
- Increased Healthcare Costs: Unnecessary tests, prolonged hospital stays, and extra medications drive up the overall cost of surgery.
- Resource Allocation: Extra tests and prolonged monitoring tie up hospital resources and can delay care for other patients.
- Patient Risks: Unnecessary tests or procedures can sometimes carry their own minor risks or false positives, leading to a cascade of further unwarranted interventions.
Defensive Anaesthesia is not an absolute myth — but it is only a partial necessity as far as Indian anaesthesiologists are concerned. We follow protocol-based investigations, and ISA is active in publishing guidelines for investigations at PAC. Only critical cases and long-duration surgeries are investigated more in view of the morbidity and mortality associated with them. Negative defensive anaesthesia is rare, but sometimes an anaesthesiologist may choose it when not confident to administer anaesthesia for a critical patient.