Notes, summaries, assignments, exams, and problems for Medicine and health sciences

Respiratory Conditions: Key Summaries

Bronchial Asthma

Reversible airway hyperresponsiveness.

Atopic Triad

• Asthma
• Rhinitis
• Dermatitis

Mechanism: IgE mediated, involving eosinophils (leading to bronchospasm, mucus, and edema).

Chronic Changes: Fibrosis and smooth muscle hypertrophy.

Clinical Presentation

• Wheeze
• Dyspnea
• Cough
• Chest tightness

Diagnosis

• FEV1 < 80%
• FEV1/FVC < 80%
• Reversibility test > 12%

Acute Severe Features

Arrhythmia, cyanosis, hypoxia, silent chest.

Treatment

1. SABA (Salbutamol)
2. Low ICS (Fluticasone)
3. ICS + LABA (Formoterol)

Acute Management

Oxygen, nebulized SABA, Ipratropium, systemic corticosteroids, IV magnesium sulfate. Mechanical ventilation if severe.

Pneumonias (12-16)

Community Acquired Pneumonia (CAP) Pathogens

Streptococcus pneumoniae,...

Q: Ceftriaxone and Therapeutic Uses

Ceftriaxone is a third-generation cephalosporin antibiotic that is widely used in clinical settings due to its broad-spectrum antibacterial activity and convenient once-daily dosing. It is administered parenterally (usually IV or IM) and is especially useful for treating moderate to severe infections.

Mechanism of Action

Ceftriaxone works by inhibiting bacterial cell wall synthesis. It binds to penicillin-binding proteins (PBPs), interfering with the final step of peptidoglycan synthesis, leading to bacterial cell lysis and death.

Therapeutic Uses of Ceftriaxone

Central Nervous System Infections

Bacterial meningitis (especially in children and adults):

• Covers Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus

🧪 Topic 70: Lincosamides, Amphenicols, Polymyxins

Lincosamides (e.g., Clindamycin)

• MOA: Binds to the 50S ribosomal subunit → inhibits peptide translocation → blocks protein synthesis (bacteriostatic).

• Use: Anaerobic infections (e.g., Clostridium perfringens, Bacteroides), aspiration pneumonia, oral infections, invasive Streptococcus infections.

• Adverse effects: Diarrhea, pseudomembranous colitis (C. difficile), fever.

• Contraindication: Pregnancy (first trimester).

Amphenicols (e.g., Chloramphenicol)

• MOA: Inhibits peptidyltransferase on the 50S subunit → blocks protein synthesis (bacteriostatic).

• Use: Meningitis (H. influenzae, N. meningitidis, S. pneumoniae), Rickettsial infections.

• Adverse effects: Bone marrow suppression (aplastic anemia)

Pharmacology Fundamentals

Medical Prescription Components and Units

A medical prescription includes the date, patient identification (such as name, age, and weight if relevant), the Rx symbol (meaning "take"), the inscription (drug name, strength, dosage form, and quantity), the subscription (instructions to the pharmacist), the signatura or "Sig." (directions for the patient including route, frequency, and duration), the prescriber's information (name, signature, license number), and refill instructions. Units of measurement include micrograms (µg), milligrams (mg), grams (g), milliliters (mL), liters (L), concentrations such as percentage (%) and mg/mL, international units (IU), and sometimes weight per kilogram of body weight. Obsolete units...

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....

Understanding Your Prescription Label

1. Pharmacy Name and Address: Displayed at the top of the prescription label is the name and address of the pharmacy that filled the prescription.

2. Pharmacy Phone Number: Found near the pharmacy’s name and address.

3. Prescription Number: A key element of the label, needed to refill the prescription.

4. Prescribing Doctor and Fill Date: The doctor’s name appears on the label (location may vary), along with the date the prescription was filled, which can affect insurance coverage.

5. Patient’s Name: Clearly shows who the prescription is for; sometimes includes the patient’s address.

6. Directions for Taking the Drug: One of the most important parts of the prescription label. These instructions tell exactly...

Professional Templates for Missed Dental Appointments

Effective communication is crucial when following up with patients who have missed a scheduled dental visit. These templates demonstrate professional, patient-focused approaches used by Capdent Clinic and Happy Clinic, emphasizing the importance of consistent oral care and providing clear rescheduling instructions.

Capdent Clinic: Follow-up on Missed General Appointment

Correspondence Details

• Subject: Missed Appointment Follow-up – Capdent Clinic
• Recipient: María Martínez

Message Content

Dear María Martínez,

We hope this message finds you well and in good health.

We recently noticed that you were unable to attend your scheduled dental appointment on May 9, 2025, at 6:00 PM, and we wanted to...

Essential English Linking Words

To Start: First, once, once upon a time, to begin with, starting with, initially, from this point, last of all, at the end, in the end, finally, to finish.

Cause and Effect: Because, so, therefore, thus, consequently, hence, as a result.

To Add a Point: And, also, as well as, moreover, too, furthermore, additionally, in addition to, at the same time, again, equally importantly, in addition, above all, most of all, least of all, either...or, neither...nor, nevertheless, to continue, second, secondly, in the second place, next, the next time, then, after that, following that, subsequently, on the next occasion, so far, later on, third, in the third place, consequently.

Repetition: So briefly, in short, in fact, in...

Understanding English Future Tenses

Future Simple Tense

Structure: Will + Verb (Infinitive)

Uses of the Future Simple:

• Expressing a Prediction: 'It won't rain tomorrow.'
• Expressing Possible or Probable Actions: 'He will probably come back tomorrow.'
• Making Promises: 'I will not watch TV tonight. I promise.'
• Making a Decision at the Moment of Speaking: 'I think I'll have some tea, please.'

Signal Words for Future Simple:

in one year, next week / next month, tomorrow.

Future with Be Going To

Structure: Subject + Verb Be + Going To + Verb (Infinitive)

Uses of Be Going To:

• Expressing Intentions and Future Plans: 'I'm going to get slimmer.' (voy a adelgazar)
• Making Future Predictions Based on Present Evidence: 'The sky is absolutely dark. It is going to rain.

Invasive Ductal Carcinoma (IDC) Features

Invasive ductal carcinoma (IDC) is the most common form of breast cancer. Key pathological features include:

• Invasion: Cancer cells infiltrate the stroma, lacking a myoepithelial layer (confirmed by immunohistochemistry).
• Tumor Cells: Malignant cells characterized by pleomorphism, hyperchromatic nuclei, and mitotic activity.
• Tubule Formation: Varies by grade, ranging from Grade 1 (well-differentiated) to Grade 3 (poorly differentiated).
• Nuclear Grade: Low-grade tumors show small, uniform nuclei, while high-grade tumors exhibit large, irregular, hyperchromatic nuclei.
• Desmoplastic Stroma: Dense fibrous tissue surrounding tumor cells.
• Lymphovascular Invasion: Presence of tumor emboli in lymphatic or vascular