23.4 Professional Ethics, Informed Consent, Patient Safety, and Helsinki Declaration

23.4 Professional Ethics, Informed Consent, Patient Safety, and Helsinki Declaration

The practice of anaesthesiology and intensive care medicine carries intense moral, legal, and safety responsibilities. Because anaesthetized patients surrender physical consciousness, protective reflexes, and autonomy, clinicians operate under an unyielding fiduciary duty to uphold rigorous ethical standards, ensure valid informed consent, champion patient safety systems, and optimize end-of-life care.

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1. The Beauchamp and Childress Framework of Biomedical Ethics

Contemporary medical ethics relies on the four-principles framework formulated by Tom Beauchamp and James Childress:

                     [ THE FOUR BIOETHICAL PRINCIPLES ]
                                    |
      +-----------------------------+-----------------------------+
      |                             |                             |
[ Respect for Autonomy ]      [ Non-Maleficence ]           [ Beneficence ]
  - Self-determination          - Primum non nocere           - Acting in patient's
  - Informed consent            - Minimize avoidable harm       best interests
  - Treatment refusal           - Safe practice standards     - Restoring health
                                    |
                               [ Justice ]
                                 - Distributive fairness
                                 - Equal resource allocation
                                 - Non-discriminatory care

1. Respect for Autonomy: Acknowledges the intrinsic moral right of individuals to hold views, make choices, and take actions based on their personal values and beliefs. It underpins informed consent, confidentiality, and the right to refuse medical interventions.
2. Beneficence: The positive moral obligation of healthcare practitioners to act for the benefit of the patient, contributing to their welfare, alleviating suffering, and preserving life.
3. Non-Maleficence: Grounded in the ancient aphorism primum non nocere ("first, do no harm"). It obligates clinicians to refrain from inflicting intentional harm, providing futile care, or exposing patients to disproportionate procedural risks without commensurate clinical benefit.
4. Justice: Primarily concerns distributive justice—the fair, equitable, and appropriate distribution of healthcare resources, intensive care beds, donor organs, and specialized medications without prejudice or social discrimination.

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2. Informed Consent, Mental Capacity, and Emergency Exceptions

Core Elements of Valid Consent

For informed consent to be legally and ethically valid, three criteria must be fulfilled simultaneously:

• Capacity: The patient possesses the cognitive ability to make the specific medical decision at the time it is presented.
• Adequate Information Disclosure: The clinician must disclose the nature, purpose, benefits, alternatives, and material risks of the proposed intervention. In modern European and UK jurisprudence (exemplified by the landmark Montgomery v Lanarkshire Health Board [2015] ruling), risk disclosure has shifted from the traditional "prudent doctor" standard (Bolam) to the "prudent patient" standard. A risk is legally deemed material if: 1) a reasonable person in the patient's position would be likely to attach significance to it; or 2) the doctor is or should reasonably be aware that this particular patient would be likely to attach significance to it.
• Voluntariness: The decision must be made freely, devoid of coercion, manipulation, or undue influence from medical staff, family members, or institutional pressures.

Assessment of Mental Capacity (Four-Step Functional Test)

Under standard mental capacity frameworks (such as the UK Mental Capacity Act 2005 and equivalent European legislation), all adult patients are presumed to have capacity unless demonstrated otherwise. Capacity is decision-specific and time-specific (a patient may have capacity to consent to simple venipuncture but lack capacity for a high-risk Whipple procedure; capacity may fluctuate in delirium or sepsis). An individual has capacity if they can execute all four functional steps:

1. Understand the information relevant to the decision (including diagnosis, the proposed treatment, alternatives, and the foreseeable consequences of accepting or refusing).
2. Retain that information long enough to make the decision.
3. Weigh or balance the information as part of the process of arriving at a decision.
4. Communicate their decision (by speech, writing, sign language, or non-verbal communication such as squeezing a hand or blinking).

The Emergency Treatment Exception: Doctrine of Implied Consent

When an adult patient is unconscious, severely intoxicated, or delirious due to acute trauma, shock, or sepsis—and therefore lacks decision-making capacity—the clinician is authorized under the common law doctrine of necessity / implied consent to administer life- or limb-saving medical care. Treatment must be strictly limited to interventions that are immediately necessary to preserve life, prevent serious deterioration, or relieve severe pain, provided there is no known, valid, and applicable Advance Decision to Refuse Treatment (ADRT).

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3. Treatment Refusal, Advance Decisions, and Jehovah's Witness Patients

Right to Refuse Treatment

A competent adult patient possesses the absolute legal and ethical right to refuse any medical treatment, even if that refusal results in certain death. An Advance Decision to Refuse Treatment (ADRT) / Living Will is legally binding if it is valid (created when competent, signed, witnessed, without duress) and applicable to the exact clinical situation.

Perioperative Management of the Jehovah's Witness Patient

Jehovah's Witness patients refuse allogeneic whole blood and its primary cellular components (PRBCs, white blood cells, platelets, and plasma) based on biblical prohibitions against "ingesting blood" (Acts 15:28-29; Leviticus 17:11-14).

+------------------------------------+------------------------------------+
|      GENERALLY UNACCEPTABLE        |  MATTER OF INDIVIDUAL CONSCIENCE   |
+------------------------------------+------------------------------------+
| - Allogeneic whole blood           | - Cell salvage (intraoperative     |
| - Packed red blood cells (PRBC)    |   autotransfusion in closed loop)  |
| - Fresh frozen plasma (FFP)        | - Acute normovolemic hemodilution  |
| - Platelet concentrates            | - Albumin, cryoprecipitate         |
| - Pre-deposited autologous blood   | - Coagulation factor concentrates  |
|   (stored blood separated from body)|   (PCC, fibrinogen concentrate)    |
|                                    | - Recombinant erythropoietin, G-CSF|
+------------------------------------+------------------------------------+

Clinical Management Protocol for Bloodless Surgery

1. Detailed Preoperative Agreement: The anaesthetist must conduct an unpressured, documented preoperative interview using a standardized checklist to confirm exactly which secondary fractions (albumin, factor concentrates, cryoprecipitate) and autologous modalities (closed-loop cell salvage, acute normovolemic hemodilution, hemodialysis) are acceptable to the patient.
2. Preoperative Optimization: Maximize baseline red cell mass weeks prior to elective surgery using high-dose intravenous iron (ferric carboxymaltose) and recombinant human erythropoietin ($40{,}000\text{ IU}$ subcutaneous weekly).
3. Meticulous Intraoperative Conservation:
   • Prophylactic antifibrinolytics: Tranexamic acid ($1\text{ g}$ IV pre-incision followed by infusion).
   • Cell salvage: Must be arranged in an uninterrupted, closed-loop circuit maintaining continuous fluid contact with the patient's vascular tree (satisfying many patients' theological requirement that blood not leave the circulation).
   • Strict hypothermia prevention: Maintain core temperature $\ge 36.5\text{°C}$ to preserve native enzymatic coagulation cascade function.
   • Permissive anemia: Restrict phlebotomy blood loss; tolerate lower hemoglobin thresholds guided by mixed venous oxygen saturation ($S_{cv}\text{O}_2 > 65\text{--}70\%$) and lactate clearing rather than arbitrary triggers.

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4. Perioperative Do-Not-Resuscitate (DNR) Orders: "Required Reconsideration"

In the operating theatre, many standard anaesthetic interventions (airway instrumentation, mechanical ventilation, fluid boluses, vasoactive drug infusions) overlap indistinguishably with elements of cardiopulmonary resuscitation. Furthermore, cardiac arrest in the OR is frequently iatrogenic, witnessed, and rapidly reversible (e.g. high vagal tone, transient drug effect, regional block sympathectomy).

The Ethical Consensus: Required Reconsideration

Major professional bodies (including the American Society of Anesthesiologists and the Association of Anaesthetists) declare that the automatic, unilateral suspension of a DNR order during anaesthesia is unethical, as it violates patient autonomy. Clinicians must engage in a formal process of "Required Reconsideration" with the patient or their legal surrogate prior to surgery, selecting one of three explicit approaches:

1. Full Resuscitation: The DNR order is temporarily suspended for the perioperative and immediate PACU period, with agreement that standard resuscitation will be provided if arrest occurs.
2. Limited Resuscitation (Goal-Directed): Resuscitative procedures are tailored to patient-defined values. For example, the patient may consent to vasoactive infusions, antiarrhythmics, defibrillation, and transient intubation for reversible anaesthetic-induced complications, but refuse closed-chest cardiac compressions or prolonged postoperative mechanical ventilation.
3. Maintenance of DNR: The DNR order remains fully operative without modification. If cardiac arrest occurs, no resuscitative efforts are undertaken, and natural death is permitted.

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5. Brain Death Determination and Management of the Organ Donor

Brain Death Criteria

Brain death represents the irreversible cessation of all functions of the entire brain, including the brainstem. Prerequisites for clinical testing include: 1) confirmed irreversible structural brain damage of known etiology; 2) exclusion of reversible metabolic, endocrine, or toxic confounders; 3) a core temperature above the national threshold (for example $\ge 36\text{°C}$ under World Brain Death Project criteria, $> 34\text{°C}$ in the UK code); 4) systolic blood pressure $\ge 100\text{ mmHg}$; and 5) complete absence of residual effects from sedatives, narcotics, and neuromuscular blockers.

• Brainstem Reflexes: Complete bilateral absence of pupillary light reflexes, corneal reflexes, oculocephalic reflexes (doll's eyes), oculovestibular reflexes (cold caloric testing with $50\text{ mL}$ ice water), gag reflexes, and cough reflexes.
• Apnea Test: The patient is pre-oxygenated with 100% $\text{O}_2$, disconnected from mechanical ventilation while insufflating $\text{O}_2$ into the trachea ($6\text{ L/min}$). Absence of respiratory drive is confirmed when arterial $P_a\text{CO}_2$ climbs to $\ge 60\text{ mmHg}$ ($\ge 8.0\text{ kPa}$) with $pH < 7.30$ (World Brain Death Project); national codes differ, as described in the intensive care chapter's brain death section.

Physiological Donor Management: The "Rule of 100s"

Brain death induces an initial catecholamine storm followed by profound vasodilation, neurogenic diabetes insipidus, hypothermia, and endocrine failure. To preserve graft viability for transplantation, intensive care management adheres to the "Rule of 100s":

• Systolic Blood Pressure: $>100\text{ mmHg}$ (or $MAP \ge 65\text{--}70\text{ mmHg}$)
• Arterial Oxygenation ($P_a\text{O}_2$): $>100\text{ mmHg}$ (with $Fi\text{O}_2 \le 0.40$ and PEEP $5\text{--}8\text{ cmH}_2\text{O}$)
• Urine Output: $>100\text{ mL/h}$ ($1\text{--}3\text{ mL/kg/h}$)
• Hemoglobin Concentration: $>100\text{ g/L}$ ($10\text{ g/dL}$)
• Blood Glucose: $<10\text{ mmol/L}$ ($<180\text{ mg/dL}$)

Hormonal Resuscitation Protocol

• Methylprednisolone: $15\text{ mg/kg}$ IV bolus to suppress the systemic inflammatory cascade and improve donor lung oxygenation.
• Thyroid Hormone: Triiodothyronine ($T_3$, $4\text{ }\mu\text{g}$ IV bolus followed by $3\text{ }\mu\text{g/h}$) or levothyroxine ($T_4$, $20\text{ }\mu\text{g}$ bolus) to reverse neuroendocrine collapse and myocardial metabolic exhaustion.
• Vasopressin: Low-dose infusion (about $0.5\text{--}2.4\text{ units/h}$) to restore vascular tone, treat diabetes insipidus, and reduce catecholamine requirements.
• Desmopressin (DDAVP): Intermittent IV boluses of $1\text{--}4\text{ }\mu\text{g}$ for diabetes insipidus when vascular tone is adequate.
• Insulin Infusion: Titrated to maintain euglycemia ($6\text{--}10\text{ mmol/L}$).

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6. Patient Safety, the Helsinki Declaration, and Crisis Resource Management

The Helsinki Declaration on Patient Safety in Anaesthesiology (2010)

Produced in 2010 by the European Society of Anaesthesiology (ESA, now ESAIC) and the European Board of Anaesthesiology (EBA), the Helsinki Declaration sets out practical requirements for perioperative patient safety. Its requirements include:

1. WHO Surgical Safety Checklist: Institutions should support the 3-phase checklist in all operative procedures: Sign In (before induction of anaesthesia), Time Out (before skin incision), and Sign Out (before the patient leaves the operating room). Clinical trials demonstrate significant reductions in surgical mortality and complications.
2. Reporting and Audit: Institutions should collect the data needed for an annual report on morbidity and mortality and the safety measures taken, and should take part in national audits of safe practice; non-punitive critical incident reporting supports this learning.
3. Minimum Monitoring and Facilities: The European Board of Anaesthesiology minimal monitoring standards should be recognised in all institutions, sedation should follow anaesthesiology-recognised standards, and every institution should be able to provide appropriate post-anaesthesia care.
4. Protocols: Institutions should have protocols for preoperative assessment, equipment and drug checks, syringe labelling, difficult or failed intubation, malignant hyperthermia, anaphylaxis, local anaesthetic toxicity (LAST), massive hemorrhage, infection control, and postoperative care including pain relief.

Human Factors and Crisis Resource Management (CRM)

Over 70% of anaesthetic critical incidents originate from human factors rather than technical equipment failure. Anesthetists must master non-technical skills:

• Situational Awareness: Maintaining perception of environmental elements, comprehending their meaning, and projecting future status; avoiding fixation errors (tunnel vision).
• Closed-Loop Communication: The sender gives a concise command directed to a specific individual; the receiver repeats the order verbatim, confirms completion, and reports the response.
• Flattening Authority Gradients: Empowering all operating room team members (nurses, trainees, technicians) to voice safety concerns without fear of reprisal, utilizing graded assertiveness (e.g. the PACE model: Probe, Alert, Challenge, Emergency).