Short Notes (10 Marks Each)

a) Consent to Medical Treatment

Definition

Legal Basis

• Every person has the right to have their bodily integrity respected (common law principle).
• Any unauthorized touching of a person constitutes battery - both a criminal offence and a civil tort.
• Performing surgery without consent may result in:
  1. Criminal battery prosecution
  2. Civil damages for the tort of battery (no need to prove harm - only lack of consent)
  3. Negligence claim if risks were not disclosed and harm occurred

Types of Consent

Requirements for Valid Consent (Elements)

1. Capacity - Patient must be mentally competent (able to understand, retain, weigh information, and communicate a decision)
2. Information - Adequate disclosure of: diagnosis, nature of procedure, material risks, benefits, alternatives, and consequences of refusal
3. Voluntariness - Free from coercion, undue influence, or fraud

The "Bolam Test" and "Montgomery Test"

• Bolam test: Disclosure judged by what a responsible body of medical opinion would disclose
• Montgomery ruling (modern standard): A doctor must disclose any risk a reasonable patient would consider significant - shifting focus from professional to patient perspective
• Even small probability risks must be disclosed if the potential outcome is serious (e.g., total deafness post-stapedotomy)

Informed Consent

• Disclosure of material risks (probability + severity assessed together)
• Information about alternatives and consequences of non-treatment
• Documentation in notes - courts are skeptical of undocumented verbal claims

Special Situations

• Minors (< 18 years): Consent from parent/guardian; Gillick competence may allow a mature minor to consent
• Unconscious/emergency: Implied consent; treatment in the patient's best interest
• Mental illness: Capacity must be assessed; if lacking, legal guardians or courts may authorize
• Refusal: A competent adult has the absolute right to refuse even life-saving treatment
• Research: Separate, additional consent required (see human experiments)

Consent for Operations - Practical Points

• Must be obtained by the operating surgeon or a suitably trained deputy
• Obtained well before (not in the anaesthetic room)
• Must be documented clearly
• Patient must be able to ask questions
• Consent is a process, not just a signature

Importance

• Protects patient autonomy
• Protects the surgeon from legal liability
• Foundation of trust in the doctor-patient relationship
• Scott-Brown's Otorhinolaryngology Head & Neck Surgery, Vol 1, p. 6256-6324; Bailey & Love's Short Practice of Surgery, 28th Ed, p. 315

b) Hospital Waste Management

Definition

Significance

• Hospitals generate ~4-5 kg of waste per bed per day
• 75-90% is general waste; 10-25% is hazardous
• Improper disposal poses risks to healthcare workers, patients, waste handlers, and the community

Classification of Hospital Waste (WHO / Bio-Medical Waste Rules)

Color-Coded Bag System (India - BMW Rules 2016)

Treatment and Disposal Methods

1. Incineration - High temperature (850-1000°C) destruction; best for pathological, pharmaceutical, chemical waste; produces ash
2. Autoclaving - Steam sterilization (121°C, 15 psi, 15-30 min); for sharps and infectious waste
3. Chemical disinfection - Sodium hypochlorite for liquid waste, blood spills
4. Microwave treatment - Electromagnetic energy kills pathogens; for infectious waste
5. Landfill - Only for chemically treated, non-infectious waste
6. Shredding - Sharps after autoclaving, to prevent reuse

Sharps Management

• Never recap needles by two hands (use one-hand scoop technique)
• Sharps containers must be puncture-resistant, leak-proof, properly labeled
• Never overfill beyond 3/4 capacity
• Needle-stick injury protocol: wash, report, initiate PEP (post-exposure prophylaxis)

Regulatory Framework

• India: Bio-Medical Waste (Management and Handling) Rules 1998, amended 2016 (BMW Rules 2016)
• International: WHO guidelines on healthcare waste management
• Hospitals must appoint a Bio-Medical Waste Management Committee
• Regular training of all staff is mandatory

Hazards of Improper Disposal

• HIV, Hepatitis B/C transmission via needle-stick injuries
• Spread of antibiotic-resistant organisms
• Environmental contamination of soil and groundwater
• Toxicity from chemical/radioactive waste
• Dioxin emission from open burning

c) Donation of Cornea

Definition

Importance

• Corneal blindness affects approximately 4.9 million people worldwide
• Corneal transplantation (keratoplasty) can restore sight in 90% of cases
• Unlike organ transplants, corneal transplants do not require HLA matching in most cases (avascular tissue - immune privilege)

Eye Bank

• An eye bank is an organization that procures, evaluates, prepares, and distributes donated eyes/corneas
• Functions: public education, donor registration, retrieval, serological testing, storage, and distribution
• First eye bank established: 1944 in New York (Eye Bank for Sight Restoration)
• India: NPCB (National Programme for Control of Blindness) oversees eye banking; Tamil Nadu has one of the highest donation rates

Legal Framework in India

• Transplantation of Human Organs Act (THOA), 1994 (amended 2011) governs corneal donation
• Eye Act, 1982 (Donation of Eyes Act) - specifically allows eye donation after death
• Brain death is a legally recognized criterion for organ and tissue donation in India

Who Can Donate?

• Any person aged 1-80 years
• Donated after natural death, accident, or declared brain death
• No requirement for blood group or gender matching
• People with spectacles, diabetes (controlled), hypertension can donate
• Cannot donate: HIV/AIDS, Hepatitis B/C, active ocular infections (conjunctivitis, keratitis), rabies, septicemia, unknown cause of death

Procedure for Corneal Retrieval

1. Family consent obtained (next-of-kin) immediately after death
2. Eyes kept closed, wet gauze applied, head elevated
3. Retrieved within 6 hours of death (up to 12 hours if the body is refrigerated)
4. Enucleation (whole eye removal) or in-situ corneoscleral disc excision under aseptic conditions
5. Stored in preservative medium (McCarey-Kaufman medium, Optisol) at 4°C
6. Viable for transplant up to 4-7 days after retrieval
7. Serological screening: HIV, HBsAg, HCV, syphilis (mandatory)

Types of Corneal Transplantation

• Penetrating Keratoplasty (PK): Full-thickness corneal replacement (traditional)
• DALK (Deep Anterior Lamellar Keratoplasty): Anterior layers only (e.g., keratoconus)
• DSEK/DMEK: Endothelial keratoplasty (Fuchs' dystrophy, bullous keratopathy)

Indications for Corneal Transplant

• Keratoconus
• Corneal scarring (trachoma, injury, ulcer)
• Fuchs' endothelial dystrophy
• Bullous keratopathy
• Corneal dystrophies

Pledging

• Individuals can pledge their eyes/corneas during lifetime
• Pledge cards registered with eye banks
• Pledge is not legally binding; family consent is still required at time of death

d) Human Experiments (Ethics of Research on Human Subjects)

Definition

Historical Background and Ethical Violations

• Nazi experiments (World War II): Prisoners subjected to brutal experiments without consent - led directly to the Nuremberg Code
• Tuskegee Syphilis Study (1932-1972): African-American men with syphilis denied penicillin even after it became available - a landmark case of research abuse

Major Ethical Codes and Guidelines

Nuremberg Code (1947) - Key Principles

1. Voluntary consent is absolutely essential
2. Experiment must be for the good of society
3. Prior animal experimentation required
4. Avoid all unnecessary physical and mental suffering
5. No experiment if death or disabling injury is expected
6. Risk must be proportionate to humanitarian importance
7. Adequate protective preparations required
8. Only qualified scientists should conduct experiments
9. Subject free to withdraw at any time
10. Investigator must stop if continuation is likely to cause harm

Declaration of Helsinki - Key Points

• Distinguishes therapeutic research (potential benefit to subject) from non-therapeutic research (pure knowledge gain)
• Vulnerable populations (children, prisoners, mentally ill) need extra protection
• Negative results must be published (publication bias addressed)
• Independent Ethics Committee (IEC/IRB) review is mandatory
• Placebo use acceptable only when no proven therapy exists

Principles from the Belmont Report

1. Respect for persons (Autonomy): Informed consent; treat individuals as autonomous agents; protect those with diminished autonomy
2. Beneficence: "Do no harm"; maximize benefits and minimize risks
3. Justice: Fair distribution of research burden and benefit; no exploitation of vulnerable groups

Informed Consent in Research

• Purpose of the study
• Nature of procedures (experimental vs. standard)
• Foreseeable risks and discomforts
• Anticipated benefits
• Alternative treatments
• Confidentiality assurances
• Compensation for injury
• Freedom to withdraw without penalty
• Contact information for questions

Ethics Committee (IEC/IRB)

• Independent review of research protocols before commencement
• Composition: medical experts, laypeople, ethicists, legal experts
• Reviews: scientific merit, risk-benefit ratio, consent process, data safety
• Provides ongoing oversight during the trial

Special Situations

• Children: Assent from child + consent from parent/guardian
• Prisoners: Extra protection; must not receive undue incentives
• Pregnant women: Particular caution due to fetal risk
• Placebo-controlled trials: Ethical only when no standard therapy exists (Helsinki requirement)
• Phase I trials: First-in-human studies; healthy volunteers; dose-escalation; safety assessment

Types of Clinical Trials

• Phase I: Safety, pharmacokinetics (healthy volunteers, 20-80 subjects)
• Phase II: Efficacy and dosing (patients, 100-300 subjects)
• Phase III: Comparative efficacy vs. standard treatment (large RCTs, 1000+ subjects)
• Phase IV: Post-marketing surveillance (safety in real-world use)

Indian Regulatory Framework

• CDSCO (Central Drugs Standard Control Organisation) regulates clinical trials in India
• Schedule Y of Drugs and Cosmetics Act governs clinical trial requirements
• ICMR National Ethical Guidelines for Biomedical and Health Research Involving Human Participants (2017)

Sources: Scott-Brown's Otorhinolaryngology Head & Neck Surgery, Vol 1; Bailey & Love's Short Practice of Surgery, 28th Ed; Nuremberg Code (1947); Declaration of Helsinki (WMA, 2013); Belmont Report (1979); THOA India (1994); BMW Rules India (2016); ICMR Guidelines (2017)