Is it good to place a filter for pulmonary embolism or not?

Written by Yuan Qing
Pulmonology
Updated on September 03, 2024
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Whether it is good or not to place a filter for pulmonary embolism mainly depends on the cause of the pulmonary embolism and whether there are indications for placing a filter.

Generally speaking, if pulmonary embolism is caused by the formation of blood clots in the lower limbs or the inferior vena cava, placing a filter can generally be beneficial. However, not all cases of lower limb venous thrombosis require a filter. Filters are usually only used for deep or large vein thromboses that are not suitable for thrombectomy or thrombolysis treatments. If a filter is placed under other conditions, it is very likely that thrombosis will re-form on the surface of the filter, potentially leading to some recurrent pulmonary embolisms or iatrogenic pulmonary embolisms. Therefore, the decision to place a filter is complex and requires a doctor to weigh the pros and cons before deciding whether or not to proceed.

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Written by Li Qiang
Intensive Care Unit
49sec home-news-image

Why does pulmonary embolism cause cardiac arrest?

The mechanisms causing cardiac arrest due to acute pulmonary embolism mainly encompass several aspects. One is a large-scale acute extensive pulmonary embolism, which prevents the blood from being ejected from the right heart, potentially leading to acute right heart failure. At this time, the entire body's blood circulation will encounter issues. Another scenario is that following the pulmonary embolism, it causes severe hypoxia. This hypoxia can lead to oxygen deficiency in all organs of the body, including the heart. The coronary arteries that supply nutrients to the heart can also become ischemic. Both of these factors can cause the heartbeat to lead to sudden cardiac arrest. These are the primary mechanisms that can cause a sudden stop in the heartbeat.

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Written by Yuan Qing
Pulmonology
1min 4sec home-news-image

What are the symptoms when pulmonary embolism becomes severe?

Pulmonary embolism can vary in severity, with serious cases primarily causing unstable vital signs. The disease primarily arises from venous thrombi in the venous system, which travel with the venous blood back to the right heart, and then with the blood flow from the right heart back to the aorta. If the thrombus is relatively large, it can easily become lodged in the pulmonary artery, forming a pulmonary embolism. The symptoms of pulmonary embolism can range from mild to severe. Based on the patient's symptoms and vital signs, pulmonary embolism is categorized into low risk, intermediate risk, and high risk. Low and intermediate risk typically indicate that the patient's vital signs are relatively stable, with normal blood pressure, heart rate, and pulse oximetry saturation. In severe cases, patients may exhibit noticeable symptoms such as coughing up blood, difficulty breathing, low blood pressure, shock, and oliguria. These represent the more severe cases of pulmonary embolism.

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Written by Wang Chun Mei
Pulmonology
1min 2sec home-news-image

What should I do if I have pulmonary embolism and asthma?

Pulmonary embolism is a very common type of disease clinically, and its triggering factors are numerous and complex. For such patients, the main triggering factors are usually the detachment of thrombi from the pelvic deep veins and the lower limb deep veins, leading to pulmonary artery embolism. Therefore, the clinical symptoms that appear in these patients are mainly difficulty breathing, chest tightness, chest pain, and some patients may experience coughing, coughing up blood, shortness of breath, and even wheezing. Thus, for such patients, it is first necessary to clarify the cause of the disease, and then provide the patient with oxygen, thrombolysis, anticoagulation, and other symptomatic treatments. Usually, after effective symptomatic treatment, when the embolism location is effectively controlled, the symptoms of wheezing and air blockage that the patient experiences will also be significantly improved.

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Written by Wei Shi Liang
Intensive Care Unit
1min 35sec home-news-image

How long does the treatment for pulmonary embolism take?

The timing of pulmonary embolism treatment mainly depends on the severity of the pulmonary embolism. The main goals of pulmonary embolism treatment are to save lives by addressing life-threatening right heart dysfunction and obstructive shock caused by the pulmonary embolism, to re-establish pulmonary vascular patency, restore lung tissue perfusion, and prevent the recurrence of pulmonary embolism. Main treatment methods include: respiratory and circulatory support, anticoagulation, thrombolysis, interventional or surgical removal of blood clots, placement of inferior vena cava filters, etc. General management: Patients who are highly suspected or diagnosed with pulmonary embolism should be closely monitored, tracking changes in respiration, heart rate, blood pressure, venous pressure, electrocardiogram, and blood gases to prevent the dislodgement of clots again. Absolute bed rest is required, and care should be taken not to overly bend the lower limbs, maintain bowel regularity, and avoid straining. For patients experiencing anxiety and panic symptoms, reassurance should be provided, along with appropriate use of sedatives. If there is chest pain, analgesics may be administered. For symptoms like fever and cough, corresponding symptomatic treatments should be given. To prevent lung infections and treat phlebitis, antibiotics may be used. Additionally, support treatments for respiratory and circulatory functions, as well as anticoagulation therapy, should be provided.

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Written by Yuan Qing
Pulmonology
58sec home-news-image

Is it good to place a filter for pulmonary embolism or not?

Whether it is good or not to place a filter for pulmonary embolism mainly depends on the cause of the pulmonary embolism and whether there are indications for placing a filter. Generally speaking, if pulmonary embolism is caused by the formation of blood clots in the lower limbs or the inferior vena cava, placing a filter can generally be beneficial. However, not all cases of lower limb venous thrombosis require a filter. Filters are usually only used for deep or large vein thromboses that are not suitable for thrombectomy or thrombolysis treatments. If a filter is placed under other conditions, it is very likely that thrombosis will re-form on the surface of the filter, potentially leading to some recurrent pulmonary embolisms or iatrogenic pulmonary embolisms. Therefore, the decision to place a filter is complex and requires a doctor to weigh the pros and cons before deciding whether or not to proceed.