Summary
Highlights
Types of PH with known causes include connective tissue disorders (e.g., SLE, systemic sclerosis), portal hypertension, HIV infection, congenital heart diseases, and schistosomiasis. Risk factors for PH include being a woman between 20-40 years old, family history, and certain drugs like weight-loss medications (e.g., glutamine), amphetamines, cocaine, and SSRIs, which cause pulmonary artery constriction. Pulmonary hypertension is classified into five groups: Group 1 (idiopathic, heritable, or associated with connective tissue diseases, HIV, drugs), Group 2 (due to left-sided heart failure from MI or systemic hypertension), Group 3 (related to chronic lung diseases like COPD or pulmonary fibrosis), Group 4 (caused by pulmonary artery obstruction such as blood clots, tumors, parasites, or foreign particles), and Group 5 (due to other mechanisms like sarcoidosis, glycogen storage diseases, or hematologic or metabolic disorders).
Key signs and symptoms of pulmonary hypertension include shortness of breath (main presenting symptom), syncope (loss of consciousness), tachycardia, increased jugular venous pressure (JVP), hepatomegaly, and peripheral edema, all indicative of right-sided heart strain. ECG changes that indicate right-sided problems include peaked P waves, right ventricular hypertrophy (tall R waves in V1-V2 and deep S waves in V5-V6), right axis deviation (RAD), and right bundle branch block (RBBB). Diagnostic procedures include an echocardiogram and chest X-ray.
Treatment for pulmonary hypertension focuses on addressing the underlying disease. Medications may include anticoagulants (e.g., heparin, warfarin) to prevent blood clots, supplemental oxygen to alleviate shortness of breath, and diuretics (e.g., furosemide) to reduce edema. Other treatments target pulmonary artery constriction, such as calcium channel blockers (e.g., felodipine, amlodipine, nifedipine, nicardipine, verapamil, diltiazem), phosphodiesterase-5 inhibitors (e.g., sildenafil/Viagra), endothelin receptor antagonists (e.g., bosentan, macitentan), and prostacyclin analogues.
Pneumonia is an infection and inflammation of the lung parenchyma, specifically affecting the alveoli and surrounding tissues. This inflammation causes the alveoli to fill with mucus, fluids, and debris, which impairs gas exchange, leading to hypoxia (low oxygen) and increased carbon dioxide retention. Pneumonia can be caused by bacteria, viruses, fungi, or mycobacteria. Pneumonia is a type of pneumonitis, but unlike infectious pneumonia, pneumonitis can also be non-infectious, brought on by factors like radiation, autoimmune conditions, or aspiration.
There are several classifications of pneumonia: Community-Acquired Pneumonia (CAP), acquired outside a healthcare setting or less than 48 hours after hospital admission; Hospital-Acquired Pneumonia (HAP), acquired more than 48 hours after hospital admission, often more severe; Ventilator-Associated Pneumonia (VAP), which develops in intubated patients due to biofilm in the endotracheal tube; Aspiration Pneumonia, caused by inhaling endogenous (from within the body) or exogenous (from outside the body) contents like food or fluids, often seen in patients with impaired swallowing; and Pneumonia in Immunocompromised Host, affecting individuals with weakened immune systems due to conditions like cancer, renal failure, or AIDS, making them susceptible to slow-growing microorganisms.
Pneumonia begins with exposure to microorganisms (bacteria, viruses, fungi, or mycobacteria) that lodge in the airway. Immune cells are activated, causing inflammation. If lodged in the bronchial tree, inflammation leads to mucus production, decreasing ventilation, lowering oxygen levels, and increasing carbon dioxide, resulting in difficulty breathing and coughing. If lodged in the alveoli, it increases capillary permeability, causing fluid shifting, which manifests as crackles upon auscultation and can lead to lobar pneumonia (unilateral) or even bilateral bronchopneumonia.
Common signs and symptoms of pneumonia include altered mental status (restlessness, agitation, confusion), fever (above 38°C), fine or coarse crackles upon auscultation, dyspnea (difficulty breathing), and pleuritic chest pain (sharp pain upon inspiration or coughing). Other signs can include productive cough with rusty, yellow, or greenish sputum depending on the microorganism.
Potential complications of pneumonia include pleural effusion, where fluid accumulates in the pleural space, leading to chest pain, dyspnea, diminished breath sounds, and dull resonance on percussion. Another severe complication is Acute Respiratory Distress Syndrome (ARDS), characterized by stiffening of the lungs and refractory hypoxemia. Septic shock can also occur if the infection enters the bloodstream, leading to severely low blood pressure, tachycardia, fever, elevated WBC count, and decreased urine output due to multiple organ dysfunction. Other complications include lung abscesses, empyema, and in severe cases, death.
Diagnosis of pneumonia involves chest X-rays, CBC (showing elevated WBCs), CRP (indicating inflammation), renal function tests (showing increased urea), sputum culture to identify the causative microorganism, and blood culture. Treatments vary based on severity: mild cases are treated with oral antibiotics like amoxicillin, clarithromycin, or doxycycline. Moderate to severe cases require IV antibiotics and oxygen therapy. Patient education includes avoiding activities that cause shortness of breath, increasing fluid intake, and preventing reinfection. Positioning patients in high-Fowler's position, especially those with unilateral pneumonia, and frequent repositioning and suctioning in ventilator-associated cases are crucial nursing interventions.
Pulmonary hypertension (PH) is characterized by increased blood pressure in the pulmonary arteries. This condition causes right-sided heart strain. Diagnosis involves a mean pulmonary artery pressure greater than 25 mmHg at rest, or a pulmonary capillary wedge pressure less than 15 mmHg. PH can be idiopathic (unknown cause) or secondary to various conditions.