Notes, summaries, assignments, exams, and problems for Medicine & Health

✅ Control of Haemorrhage (Bleeding)

Controlling haemorrhage involves stopping the bleeding, maintaining circulation, and preventing shock. The approach depends on the type and severity of the bleeding.

Types of Haemorrhage

1. External Haemorrhage: Visible bleeding from a wound.
2. Internal Haemorrhage: Bleeding inside the body.
3. Arterial Bleeding: Bright red, spurting blood.
4. Venous Bleeding: Dark red, steady flow of blood.
5. Capillary Bleeding: Oozing blood from capillaries.

Methods for Controlling Haemorrhage

Immediate Measures (First Aid)

• Direct Pressure: Apply firm pressure directly on the wound with a clean cloth or dressing.
• Elevation: Elevate the bleeding part above the heart level, if no fracture is suspected.
• Immobilization: Keep the injured part still

A bed sore, also known as a pressure ulcer or decubitus ulcer, is an area of damaged skin and tissue that develops when prolonged pressure cuts off circulation to particular parts of the body, especially over bony areas. Without enough blood flow, the affected tissue dies. Understanding the causes, prevention, and management of these injuries is crucial for patient care.

Definition of Pressure Ulcers

A bed sore is a localized injury to the skin and/or underlying tissue, usually over a bony prominence, as a result of prolonged pressure, or pressure in combination with shear.

Common Sites for Pressure Ulcer Development

• Sacrum (lower back)
• Heels
• Hips
• Elbows
• Ankles
• Back of the head
• Shoulder blades

Stages of Bed Sores (Pressure Ulcers)

1. Stage 1: Red, unbroken

Laboratory Diagnosis of COVID-19

Accurate and timely diagnosis of COVID-19 is crucial for effective patient management and public health control. Various laboratory methods are employed to detect the presence of SARS-CoV-2 or the body's immune response to it.

Specimen Collection for COVID-19 Testing

• Preferred Samples: Nasopharyngeal and oropharyngeal swabs are the primary specimens for viral detection.
• Other Specimens: In severe cases, sputum, lower respiratory tract secretions, and saliva may also be collected.

Molecular Tests: RT-PCR

• Reverse Transcription Polymerase Chain Reaction (RT-PCR) is considered the gold standard test for detecting SARS-CoV-2 RNA.
• This method identifies viral RNA by amplifying specific genetic regions of the virus, such

Combination of Antibiotics

Used when there is a mixed infection, or for the following reasons:

• Where the infectious organism is not known.
• Where the two antibiotics can produce a greater effect (synergism) than one alone.
• To prevent the development of resistance to one antibiotic.

Indications for Antibiotics

Curative Treatment

The primary aim when:

1. Infection cannot be treated with surgery.
2. As supplements to surgery (adjunctive therapy).
3. In cases of osteomyelitis and actinomycosis.

Prophylactic Treatment

Starting approximately one hour before surgery.

Absolute Indications

• Prevention of subacute bacterial endocarditis before surgical procedures.
• Diabetic patients undergoing major oral surgery.
• Immunocompromised patients.
• Oral surgery in patients previously subjected

Understanding Diabetes Insipidus and Renal Calculi

1. What is a Clinical Biomarker? Name Biomarkers Used to Diagnose DI & Renal Calculi.

A clinical biomarker is a measurable indicator of a biological state or condition.

For Diabetes Insipidus (DI):

• Serum sodium
• Osmolality
• ADH levels
• Urine osmolality

For Renal Calculi (Kidney Stones):

• Serum calcium
• Uric acid
• Oxalate levels
• Urine pH

2. What Does a Low Level of ADH Indicate?

A low level of Antidiuretic Hormone (ADH) indicates Diabetes Insipidus (DI) or pituitary gland dysfunction.

3. Explain the Role of Vasopressin in DI.

Vasopressin regulates water reabsorption in the kidneys. In DI, either vasopressin is deficient (central DI) or the kidneys do not respond to it (nephrogenic DI).

4. Explain the Role of Vasopressin

Understanding Macronutrients and DRIs

Macronutrients

Macronutrients, which include protein, carbohydrates, and fat, are required by the body in relatively large amounts (hence "macro"). All three provide energy. Fiber is a type of carbohydrate.

Dietary Reference Intakes (DRIs)

The Acceptable Macronutrient Distribution Ranges (AMDRs) are part of the DRIs. They recommend a balance of macronutrients, expressed as a percentage of total dietary energy, that is associated with:

• Maintenance of a healthy weight
• The lowest risk for chronic disease
• The lowest risk for nutrient deficiencies

Consuming macronutrients below or above these ranges increases the risk of chronic disease. Notably, the age group with the highest AMDR for fat is children aged 1-3 years.... Continue reading "Macronutrient Breakdown: Carbohydrates, Sugars, and Fats" »

Modal Verbs Exercises

Exercise 1: Rewrite the sentences using modal verbs.

1. It's forbidden to drive without fastening your seatbelt. You mustn't drive without fastening your seatbelt.
2. Perhaps they told John about the party. They might have told John about the party.
3. It isn't necessary for us to book a table. We needn't book a table.
4. It isn't necessary for her to phone me back. She needn't phone me back.
5. It was a mistake to sell the house. I wish I hadn't. I shouldn't have sold the house.
6. I'm sure he didn't lock the door. He couldn't have locked the door.
7. Perhaps John knew about the trip. He could have known about the trip.
8. You cannot smoke in the underground. You mustn't smoke in the underground.
9. I'm sure Ann didn't send that letter. Ann couldn't have

Understanding the Term "Inter Galvanic Current"

The term Inter galvanic current is not standard or widely recognized in medical, scientific, or engineering contexts. It likely refers to one of the following concepts, based on how the term might be interpreted:

1. Galvanic Current in Electrotherapy and Cosmetology

Galvanic current is a Direct Current (DC) used primarily in medical and cosmetic treatments, particularly in electrotherapy. It is continuous, unidirectional, and typically used to:

• Stimulate blood circulation.
• Promote tissue healing.
• Perform iontophoresis (driving medications or ions through the skin).
• Treat muscle atrophy or improve muscle tone.
• Used in facial treatments for deep cleansing (desincrustation) and product penetration (iontophoresis)

Foundational Concepts in Healthcare

Goals of Healthcare

• Prevent morbidity
• Prevent disability
• Prevent mortality

WHO Definition of Health

The World Health Organization (WHO) defines health as: "complete physical, mental, and social well-being.”

Top Causes of Death

• Heart disease
• Cancer
• Chronic lower respiratory diseases
• Accidents
• Stroke

Quality of Life Metrics

Where q represents quality and g represents time discount.

Medical Triaging Levels

Triaging categorizes patients based on immediate need and resource requirements:

1. Immediate Risk of Death: Highest priority.
2. Serious Immediate Medical Need: High priority.
3. Levels 3, 4, 5: Priority is dependent on the number of resources needed (more resources required generally means a lower numerical level).

Types of Healthcare