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Zhang Zhi Gong
Cardiothoracic Surgery
About me
Zhang Zhigong, male, associate chief physician, with a postgraduate degree. He is the vice chairman of the Youth Academic Committee of Hunan Provincial People's Hospital and the secretary of the Thoracic Surgery Department. He has been engaged in thoracic surgery for over ten years and has visited Shanghai Pulmonary Hospital, Chest Hospital, and Henan Zhengzhou First Hospital for learning. In 2015, he was selected by the hospital to study abroad at the teaching hospital of University of Göttingen, Germany.
Proficient in diseases
Proficient in minimally invasive single-port thoracoscopy, lung bullae, pneumothorax, advanced lung cancer, thermal ablation, radioactive seed implantation, minimally invasive NUSS funnel chest surgery, and other minimally invasive surgeries. Also, was the first in the world to apply 3D printing to the treatment of rib fractures in cardiothoracic surgery. Has extensive clinical experience in congenital and acquired heart diseases.
Voices
How to treat recurrent pneumothorax for the second time?
Patients with recurrent pneumothorax, we recommend proactive minimally invasive surgical intervention. For patients experiencing their first recurrence of pneumothorax, the likelihood of a second recurrence is about 20-30%. For those who have had two episodes of pneumothorax, it indicates the presence of a small rupture on the lung, or an area that has not healed well, or is particularly weak. Thus, for patients who have had two episodes or a second occurrence of pneumothorax, if they do not receive active treatment, the probability of a third recurrence rises to about 70-80%. Whether using minimally invasive surgery or the conservative method of simple tube insertion, both are certainly burdensome for the patient. However, for patients with a second occurrence of pneumothorax, undergoing a small minimally invasive surgery, which involves a small incision of one to two centimeters under the armpit to treat the pneumothorax, dramatically reduces the likelihood of subsequent occurrences from the previous 70-80% to below 10%. Therefore, the best treatment for a second pneumothorax episode is through minimally invasive surgical intervention.
The difference between tension pneumothorax and open pneumothorax.
The main difference between a tension pneumothorax and an open pneumothorax lies in the relative pressures of the pleural cavity compared to the atmospheric pressure. An open pneumothorax occurs when the pleural cavity is in an open state due to some reason. During inhalation, gas can enter the pleural cavity, and during exhalation, the gas can be expelled through this opening or another opening, resulting in pleural cavity pressure that is roughly equal to the atmospheric pressure. In a tension pneumothorax, due to some reason, a one-way valve is formed. The gas enters the pleural cavity easily but encounters resistance during expulsion, causing the pressure in the patient's pleural cavity to increase progressively. The gas can only enter the pleural cavity and cannot be effectively expelled. Therefore, the main difference between a tension pneumothorax and an open pneumothorax is the level of pleural cavity pressure compared to atmospheric pressure; in a tension pneumothorax, the pressure in the pleural cavity is significantly higher than the atmospheric pressure, while in an open pneumothorax, the pressures are roughly equal.
Pectus excavatum should see which department?
If the patient is relatively young, under 14 years old, and wishes to consult about pectus excavatum care, pediatric healthcare can be considered. However, if the patient is older, or in addition to pediatric healthcare advice, seeks information on how to treat pectus excavatum, it is advisable to consult with a local thoracic surgery department, if available. This is because thoracic surgeons offer not only information on the causes or care of pectus excavatum but also treatment options. Both conservative treatment plans and surgical interventions are available from thoracic surgeons. Of course, not all hospitals have a department of thoracic surgery, but general top-tier hospitals typically do; if there is no thoracic surgery available locally, considering general surgery might be the only alternative.
Is the funnel chest suction cup effective?
If the patient is young and the chest wall still retains some elasticity, or there is a possibility of secondary development, then it might be worth trying a pectus excavatum suction cup. If during the development of the chest wall, the patient's family can actively encourage or supervise the use of the suction cup for over two hours a day, continuing for six months, preferably up to about two years, the suction cup can be somewhat effective. However, if the patient's chest wall is hard and lacks elasticity, or if there is little possibility of further development, then the suction cup might not be suitable for such patients. For patients whose chest wall has fully developed, the best or most definitive treatment for pectus excavatum is surgery. Therefore, while the pectus excavatum suction cup can be useful for some patients, it is not suitable for all patients.
Does pectus excavatum require surgery?
The decision on whether surgery is needed for pectus excavatum depends on the patient's age, the severity of the deformity, and the elasticity of the chest wall. If the patient is very young, under one year old, and the pectus excavatum is not very severe, we recommend a watchful waiting approach. In patients with pectus excavatum under one year old, it is possible that the condition is pseudopectus excavatum, which may improve as they grow and develop within the first year. However, not everyone improves, with about one third of the cases showing improvement within the first year. If the child is older than one year, the likelihood of improvement is basically none, and at this time, conservative treatment using a pectus excavatum suction cup can be considered. If adhered to effectively, the suction cup can have a certain effect for some patients with pectus excavatum. But if the patient is over three to five years old and the chest wall has matured, surgery should be considered. Therefore, for the vast majority of patients with pectus excavatum, surgery is a relatively definitive and immediately effective method.
Is sternal pain leukemia?
There are many causes of chest pain, and it is not necessarily only leukemia. For young people or children, sometimes injuries such as those from car accidents, sleeping on the stomach, or accidentally bumping into chair backs or table corners can cause sternal pain. However, persistent sternal pain in children should be carefully examined for the possibility of blood disorders. Of course, this can be ruled out through chest CT scans, or, if necessary, a small sternal biopsy under local anesthesia to check for leukemia. But for adults, there are many other possible causes of chest pain, such as gastrointestinal ulcers, stomach ulcers, and duodenal ulcers which can radiate to the surrounding area of the sternum causing pain. Additionally, some anatomical organs behind the sternum such as heart diseases, coronary artery disease, and angina can also cause sternal pain. Thymomas, thymus cancer, an enlarged thyroid, and lymphoma can all lead to sternal pain. Other malignant tumors, like lung cancer, if involving the sternum can also cause this pain. Therefore, not all cases of sternal pain are definitely due to leukemia.
Can people with pectus excavatum join the military?
Theoretically, the current conscription system does not have strict restrictions on mild cases of pectus excavatum. However, obvious moderate or severe pectus excavatum, or sternums that are inwardly and backwardly concave, can significantly impact the function of both the heart and lungs by compressing them. This inward concavity can restrict the heart’s ability to fully expand, potentially causing complete deformation of the heart, or even prevent the heart’s valves from closing fully, leading to valve regurgitation. Such compromised cardiac and pulmonary functions are likely unable to withstand the physical demands experienced during military service. Therefore, for moderate and severe cases of pectus excavatum, we do not recommend enlisting in the military, although the current policy does not have clear restrictions on mild cases of pectus excavatum.
What should be noted for pectus excavatum in daily life?
The biggest difference between children with pectus excavatum and normal children lies in the middle chest bone structure sinking backwards and inward toward the spine, creating a deformity where the front chest and the back compress each other. Naturally, this completely compresses the normal position of the heart and lungs. Therefore, the heart of such children is compressed and deformed, pushing the entire heart to one side. We have encountered clinically cases where there are just a few millimeters of space between the sternum and the spine, leaving no room for the heart, thus completely compressing and pushing it to the left side. Imagine a heart, completely compressed and deformed, where the valves inside cannot function normally. Hence, some children may exhibit insufficiencies in their tricuspid and mitral valves. Therefore, in children with pectus excavatum, their heart is under pressure, their valves deformed, leading to poor cardiac function, and their lung function is also compromised. Since the lungs also need space to expand, lungs that are completely compressed cannot fully relax, resulting in such children having poor cardiac and lung functions, reduced exercise endurance, and since the lungs cannot fully expand, such children are prone to catching colds. Thus, for children with pectus excavatum, it is important to avoid catching colds. Moreover, treating the root cause of the condition, which is pectus excavatum itself, is crucial. Therefore, correcting pectus excavatum early on is essential.
What should be noted for pectus excavatum?
We know that behind the sternum of a normal person are the heart and lungs. Pectus excavatum is a deformity where this part of the sternum is pressed inward towards the spine. Such inward compression, as it occurs right against the bony spine, will directly squeeze the heart and in severe cases, can lead to insufficiency in the heart valve closure. Therefore, the most critical issue with pectus excavatum is the compression of the heart, which also compresses the lungs. Thus, 80% of children with pectus excavatum have lower exercise capacity compared to normal children, 60% may experience chest pain, and 40% have a significantly higher respiratory rate than normal children. Therefore, for patients with pectus excavatum, it is crucial to be cautious about common colds, as their respiratory and cardiac functions can be greatly affected if they catch a cold.
How is funnel chest formed?
Regarding the cause of pectus excavatum, there have historically been many hypotheses. For a while, medical experts believed that pectus excavatum was caused by the backward pulling of the diaphragm behind the sternum. Thus, for a time, surgeries abroad involved cutting the portion of the diaphragm behind the depressed area of the chest. Eventually, it was discovered that such cutting did not significantly benefit the treatment of pectus excavatum, and the results were not very conclusive. Therefore, this hypothesis was later debunked. To date, it is generally believed that the primary formation of pectus excavatum is somewhat related to genetic or hereditary factors. Of course, not all cases of pectus excavatum are due to parents having the condition; it might be present in the genes of ancestors and only manifest in the current generation or in this patient. Additionally, pectus excavatum could be associated with other diseases, such as connective tissue disorders. For example, some patients might have congenital diaphragmatic hernias, and after surgical repair, they could be prone to pneumothorax. Furthermore, some patients may suffer from pectus excavatum due to subglottic stenosis and underdeveloped bronchopulmonary structures, possibly triggered by respiratory factors. However, no matter the details, the formation of pectus excavatum is directly or indirectly related to congenital genes or heredity.