Decreased Vital Capacity: Causes & Reasons

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Possible Causes for Decreased Vital Capacity

Respiratory Muscle Paralysis

A decrease in vital capacity of 30 to 50% when the patient is supine supports the diagnosis of bilateral diaphragmatic paralysis, whereas a decrease in vital capacity of 10 [blogs.nejm.org]

[…] in TLC, vital capacity (VC), and FRC but without changes in residual volume (RV). 5,6 The severity of compression is directly related to the degree of kyphoscoliotic angulation [archbronconeumol.org]

Lung function test in neuromuscular patient shows a restrictive pattern: total lung capacity (TLC) and vital capacity (VC) reduced while functional residual capacity (FRC) [shortnessofbreath.it]

Kyphoscoliosis

Sue displayed a restrictive lung pattern, evidenced by a decreased vital capacity and tidal volume with severe nocturnal dyspnoea, resulting in raised carbon dioxide levels [ncbi.nlm.nih.gov]

Patients with scoliosis suffer from restrictive lung disease which decreases vital capacity, functional residual capacity, tidal volume, and increased respiratory rate. [4 [joacp.org]

An angle more than 60° results in a restrictive type of pulmonary impairment with a decrease in forced expiratory volume in 1 s, forced vital capacity, and chest wall compliance [mjdrdypu.org]

Restrictive Lung Disease

Pulmonary function test demonstrates a decrease in the forced vital capacity. The main symptoms are shortness of breath and cough. [en.wikipedia.org]

A >7% decrease in vital capacity from a sitting to a supine position may indicate that diaphragmatic weakness is out of proportion to chest wall muscle weakness. [pediatrics.aappublications.org]

(7) 1.Decreased vital capacity 2.Expiratory flow rates remain normal 3.FEV1/FVC is preserved 4.Increased work of breathing (dyspnea) 5.Rapid, shallow breathing pattern (Leads [cram.com]

Pneumothorax

The main physiologic consequences of a pneumothorax are a decrease in vital capacity and a decrease in partial pressure of oxygen (PaO 2 ). [emedicine.medscape.com]

This reduces the size of the lungs equivalent to the amount of gas decreasing the vital capacity of the lung and reducing the partial pressure of oxygen. [symptoma.com]

Idiopathic Pulmonary Fibrosis

[…] forced vital capacity, a decrease in forced vital capacity remained an independent risk factor for mortality (decrease > 10%; hazard ratio 2.47; 95% confidence interval 1.29 [ncbi.nlm.nih.gov]

[…] forced vital capacity, a decrease in forced vital capacity remained an independent risk factor for mortality (decrease � 10%; hazard ratio 2.47; 95 % confidence interval 1.29 [citeseerx.ist.psu.edu]

In a multivariate Cox proportional hazards model controlling for histopathologic diagnosis, gender, smoking history, baseline forced vital capacity, and 6-month change in [ncbi.nlm.nih.gov]

Congestive Heart Failure

[…] in vital capacity by one third from maximum recorded · Tachycardia (heart rate>120 beats/min.) [medicalcriteria.com]

Minor criteria include extremity edema, night cough, dyspnea on exertion, hepatomegaly, pleural effusion, decrease in vital capacity by one third from normal, and tachycardia [clinicaladvisor.com]

> 4.5 kg in 5 days in response to treatment Minor criteria: · Bilateral ankle edema · Nocturnal cough · Dyspnea on ordinary exertion · Hepatomegaly · Pleural effusion · Decrease [medicalcriteria.com]

Chronic Obstructive Pulmonary Disease

Other test abnormalities may include Increased total lung capacity Increased functional residual capacity Increased residual volume Decreased vital capacity Decreased single-breath [msdmanuals.com]

Pulmonary Edema

A typical pattern of respiratory mechanics for a patient with residual pulmonary edema includes decreases in vital capacity and total lung capacity. [tele.med.ru]

Myasthenic Crisis

[…] forced vital capacity (FVC), atelectasis, and need for noninvasive ventilatory support are predictors of reintubation.21 Two retrospective studies found atelectasis in all [ncbi.nlm.nih.gov]

[…] pneumonia are also associated with extubation failure.7 Tracheostomy placement ranges from 14%-40%.6,7 Reintubation occurs more than one-fourth of the time.7,21 Acidosis, decreased [ncbi.nlm.nih.gov]

Pulmonary Fibrosis

[…] in vital capacity of > 10%). [rtmagazine.com]

[…] in forced vital capacity,[4][5] and it also improves people's quality of life.[6] Nintedanib does not improve survival in people with IPF.[7] It interferes with processes [en.wikipedia.org]

Vital capacity, functional residual capacity, total lung capacity, and forced vital capacity (FVC) all are reduced. [physio-pedia.com]

Ankylosing Spondylitis

Pulmonary function tests show decreased vital capacity and total lung capacity, although residual and functional residual lung volumes were increased. [mhmedical.com]

Artificial Pneumothorax

The main physiologic consequence of this process is a decrease in vital capacity and partial pressure of oxygen. [emedicine.medscape.com]

Acute Respiratory Distress Syndrome

[…] in the vital capacity by one third from maximum recorded, liver enlargement, and bilateral ankle swelling.[44] Minor criteria are acceptable only if they can not be attributed [en.wikipedia.org]

Minor criteria include an abnormally fast heart rate of more than 120 beats per minute, nocturnal cough, difficulty breathing with physical activity, pleural effusion, a decrease [en.wikipedia.org]

Myasthenia Gravis

Pulmonary function testing usually reveals a decreased vital capacity (VC) and decreases in inspiratory and expiratory muscle strength, which improve after administration [pulmonologyadvisor.com]

[…] forced vital capacity. [first10em.com]

Monitoring arterial pO 2 or oxygen saturation is not enough, as vital capacity can decrease markedly before these parameters change. [patient.info]

Flail Chest

Historically, the free-floating flail segment was deemed responsible for an the increased work of breathing with subsequent hypoxemia and decreased vital capacity; this belief [jtojournal.com]

Schiller and colleagues published a study in the European Journal of Trauma and Emergency Surgery showing that the procedure significantly improved forced vital capacity in [mayoclinic.org]

"Initially, we focused only on flail chest, but now we offer surgery to people with simple, non-flail rib fractures if their vital capacity is less than 1500 on serial exams [mayoclinic.org]

Asbestosis

[…] pulmonary compliance ) Early: decreased DL CO Later: reduced vital capacity and total lung capacity Normal to increased ratio of FEV 1 to FVC Bronchoalveolar lavage Biopsy [amboss.com]

The CO diffusing capacity is decreased and may be the earliest abnormality seen. [symptoma.com]

Supradiaphragmatic and pleural reticulonodular opacities / plaques Rounded atelectasis In some cases, pleural effusion HR- CT : Pulmonary function test : Restrictive ventilatory defects (decreased [amboss.com]

Guillain-Barré Syndrome

capacity less than 60 percent predicted. 22 One retrospective study 21 demonstrated a 40 percent decrease from predicted vital capacity, compared with a 60 percent decrease [aafp.org]

Early intubation should be considered in any patient with a vital capacity (VC) < 20 ml/kg, a Negative Inspiratory Force (NIF) < –25 cm H2O, more than a 30% decrease in either [zdoc.site]

[…] ventilation in patients who had a previously determined vital capacity included time from GBS onset to admission of less than seven days, an inability to lift the head, and a vital [aafp.org]

Pneumocystosis Jirovecii Pneumonia

Pulmonary function tests May show a modest reduction in the vital capacity (VC) and the total lung capacity (TLC). [patient.info]

The most consistent abnormality is a decrease in the single-breath diffusing capacity for carbon monoxide (DLCO), which has a sensitivity of 89%. [patient.info]

Pneumoconiosis

The frequency of abnormal vital capacity increased, and the mean vital capacity decreased by 18% over the subsequent 10 years ( 33, 75 ). [atsjournals.org]

Pleural Effusion

The occurrence of microfilaria in pleural fluid is rare. Filarial lung involvement occurs in the form of Tropical Pulmonary Eosinophilia with pulmonary infiltrates and peripheral eosinophilia. We report a 74-year-old male patient, non smoker who was admitted to our hospital with breathlessness and chest discomfort of two[…] [ncbi.nlm.nih.gov]

Neonatal Respiratory Distress Syndrome

There is a need for a rapid method to identify infants who will develop respiratory distress syndrome (RDS) soon after birth, to allow early treatment of affected infants with surfactant. The microbubble stability test (MST) may be one such method, but clinical experience is sparse. The MST was performed on[…] [ncbi.nlm.nih.gov]

Axial Spondyloarthritis

Copy/Paste the key inputs from the product brochure, per guidance from Marketing. The axial spondyloarthritis (AxSpA) market boasts biologics representing two distinct drug classes, the blockbuster tumor necrosis factor-alpha (TNF-α) inhibitors (Amgen’s Enbrel, AbbVie’s Humira, Janssen’s Remicade and Simponi /[…] [decisionresourcesgroup.com]

Progressive Bulbar Paralysis

2015 ICD-9-CM Diagnosis Code 335.22 Progressive bulbar palsy 2015 Billable Thru Sept 30/2015 Non-Billable On/After Oct 1/2015 ICD-9-CM 335.22 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 335.22 should only be used for claims with a date of service on or before[…] [icd9data.com]

Silicosis

Silicosis is a long-term lung disease caused by inhaling large amounts of crystalline silica dust, usually over many years. Silica is a substance naturally found in certain types of stone, rock, sand and clay. Working with these materials can create a very fine dust that can be easily inhaled. Once inside the lungs, it[…] [nhs.uk]

Bulbar Poliomyelitis

Bulbar poliomyelitis is a specific type of an extremely rare viral paralytic disease in which the typical findings of acute flaccid paralysis are accompanied by bulbar symptoms - dysphagia, dysphonia, nasal regurgitation, as well as vascular and respiratory impairment in severe cases. The diagnosis rests on clinical[…] [symptoma.com]

Autosomal Recessive Myopathy with Rigid Spine and Distal Joint Contractures

Her clinical phenotype also includes dysphagia of liquids, respiratory insufficiency with decreased spirometry, vital capacity and inspiratory capacity, urinary incontinence [ncbi.nlm.nih.gov]

Postpneumonectomy Syndrome

/FVC ratio and decreased vital capacity) (5,6,12,16). [shc.amegroups.com]

Many patients demonstrate increased forced vital capacity (FVC) due to the expansion of the remaining lung, with corresponding decrease in FEV1/FVC ratio (5). [shc.amegroups.com]

Pulmonary function tests before and after repair show consistent increase in peak expiratory flow rate, increased airway diameter and decreased hyperinflation (improved FEV1 [shc.amegroups.com]

Aluminosis

Age and decreased vital capacity show borderline significance. We conclude that aluminosis is still relevant in occupational medicine. [occup-med.biomedcentral.com]

Decreased Diffusion Capacity of the Lung

vital capacity and diffusion capacity. [ncbi.nlm.nih.gov]

vital capacity. [scholars.northwestern.edu]

These changes cause an increase in residual volume and decreases in FEV1/FVC, vital capacity, and DLCO in terms of pulmonary function. [ci.nii.ac.jp]

Iatrogenic Pneumothorax

The result is decreased vital capacity and Sao 2. [journals.lww.com]

Due to this there is a decrease in vital capacity as well as a decrease in PaO2 which is the main consequence of a pneumothorax. [physio-pedia.com]

The main physiologic consequence of this process is a decrease in vital capacity and partial pressure of oxygen. [emedicine.medscape.com]