Indications and objectives of the procedure
The primary reason for performing this surgical procedure is the pathological accumulation of fluid in the pericardial cavity. Direct indications include the following conditions:
- Hydropericardium — an accumulation of transudative fluid.
- Hemopericardium — the presence of blood in the pericardial cavity.
- Exudative pericarditis — an inflammatory lesion of the pericardial layers with the production of specific effusion.
Depending on the specific clinical situation, the physician pursues either a therapeutic goal (relieving the heart and restoring its normal contractile function) or a diagnostic goal (obtaining material for subsequent analysis).
Anesthesia and instrumentation
Prior to invasive procedures, adequate anesthesia of the intervention area is required. According to the classical method, exclusively local anesthesia is used. For layered tissue infiltration, a 0.5% procaine solution is traditionally used to eliminate pain sensitivity in the anterior abdominal wall within the puncture zone.
As the main working tool, the surgeon uses a specialized long needle. This needle must be securely connected to a syringe, which ensures the possibility of immediate aspiration of the contents immediately upon entering the target cavity.
Topographic anatomy and insertion technique
The success of the procedure critically depends on strict adherence to spatial landmarks. The optimal insertion point is located in a specific anatomical zone: strictly between the xiphoid process of the sternum and the left part of the costal margin.
Having chosen this point, the surgeon gives the needle a strictly defined spatial position. The direction of movement must be cranial (the vector is directed towards the patient's head). At the same time, a clear angle of inclination is observed — exactly 45° relative to the body surface.
Advancing the needle, the physician sequentially passes through the following series of anatomical layers:
- Skin.
- Subcutaneous adipose tissue.
- The rectus abdominis muscle along with its aponeurosis.
Criteria for correct performance and evacuation
The most important moment of the manipulation is the identification of contact with the pericardial sac. A reliable criterion for entry is the tactile sensation: the needle begins to make noticeable oscillations, the rhythm of which completely coincides with the frequency of the patient's heart contractions.
As soon as this contact is confirmed and the needle is in the pericardial cavity, the evacuation phase begins. Using the attached syringe, the accumulated fluid is pumped out. The total volume of removed pathological contents in severe processes can reach impressive values — from 1 to 2 liters.
Briefly: answers to topical questions
Where is the needle insertion point located during Larrey pericardiocentesis?
The insertion point for Larrey pericardiocentesis is located between the xiphoid process of the sternum and the left part of the costal margin. It is situated directly at the base of the xiphoid process. This localization corresponds to the safety zone of the anterior part of the pericardium, where it is not covered by the pleura, which completely excludes injury to the pleural leaves during needle insertion.
What anatomical layers does the needle sequentially pass through during pericardiocentesis?
During pericardiocentesis, the needle sequentially passes through the soft tissues of the anterior abdominal wall into the cavity of the pericardial sac. The pierced structures include:
- Skin — the outer integument;
- Subcutaneous tissue — the adipose layer;
- Rectus abdominis muscle with aponeurosis — the musculo-fascial layer;
- Anteroinferior pericardial recess — the target space where fluid accumulates.
What specific complications may occur during pericardiocentesis?
During pericardiocentesis, rapid cardiac decompression syndrome may develop, to prevent which fluid evacuation is carried out at a slow speed. There is also a risk of iatrogenic damage to neighboring anatomical structures located in the access zone: the liver, lung, internal thoracic artery, and intercostal vascular bundle.
Which blood vessels are in the danger zone and can be damaged during pericardiocentesis?
In the danger zone during pericardiocentesis are the internal thoracic artery and the intercostal vascular bundle.
- Internal thoracic artery (a. thoracica interna) — runs at a distance of 3–5 cm lateral to the parasternal line;
- Intercostal vascular bundle — is located directly along the lower edge of the rib.
What position on the operating table should the patient assume during pericardiocentesis?
During pericardiocentesis, the patient should assume a semi-recumbent or semi-sitting position with the head of the bed elevated by 45°. This position is referred to as Fowler's position.
Class and exam questions
Where is the needle inserted during pericardiocentesis?
The insertion point is located strictly between the xiphoid process of the sternum and the left part of the costal margin.
At what angle and in what direction is the needle advanced?
The needle is directed cranially (towards the head), maintaining an angle of 45° relative to the patient's body surface.
How does the surgeon know they have reached the pericardium?
The main criterion is the sensation of characteristic needle oscillations that occur synchronously with the heartbeat.
Which tissue layers does the needle pass through during access?
The needle sequentially pierces the skin, subcutaneous tissue, and then the rectus abdominis muscle with its aponeurosis.
What else to study on this topic
- Topographic anatomy of the rectus abdominis muscle and its sheath
- Mechanism of development and consequences of hemopericardium
- Pathophysiology of hydropericardium and exudative pericarditis
- Pharmacology of 0.5% procaine solution in local anesthesia
Master the complete topic in the "Topographic Anatomy" course
This is a summary. The course covers everything tested in classes and exams.
- Complete study guide on «Pericardiocentesis» and 2,777 more subject pages
- Assignments and quizzes after every topic — just like in a colloquium
- AI tutor answers questions on the topic anytime
- 91 video lessons on the subject
Other topics in the section "Operations on the Chest Wall and Thoracic Organs"
Free video lessons: topographic anatomyShort lessons with study notes — no registration required.
Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.