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Official Description

Cannulation, thoracic duct

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The thoracic duct serves as the primary pathway for lymphatic fluid within the body, playing a crucial role in the lymphatic system. It originates from the cisterna chyli, located at the level of the second lumbar vertebra, and ascends through the abdominal region, positioned anteriorly to the vertebral bodies. As it progresses into the thoracic cavity, the thoracic duct traverses the aortic hiatus on the right side and subsequently crosses over to the left side at approximately the fourth or fifth thoracic vertebra. Ultimately, it drains lymphatic fluid into the left jugular-subclavian venous junction. The procedure of cannulation of the thoracic duct is indicated primarily to alleviate obstructions in lymphatic flow, which may occur due to external compression from malignant tumors or in patients suffering from cirrhosis, particularly when complicated by ascites and portal hypertension. During the procedure, a surgical incision is typically made above the clavicle to access the thoracic duct. Once exposed, the duct is punctured and cannulated, allowing for the advancement of the cannula as necessary. Post-cannulation, the lymphatic fluid is carefully monitored for its flow, pressure, and composition, which can provide valuable insights into the underlying causes of any obstruction present.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure of cannulation of the thoracic duct is indicated for several specific conditions that may impede lymphatic flow. These include:

  • Obstruction due to malignant tumors - The presence of tumors can compress the thoracic duct, leading to impaired lymphatic drainage.
  • Cirrhosis complicated by ascites - In patients with liver cirrhosis, the accumulation of fluid in the abdominal cavity (ascites) can create pressure that affects lymphatic flow.
  • Portal hypertension - Increased blood pressure in the portal venous system can lead to complications that necessitate the cannulation of the thoracic duct.
  • Other conditions affecting lymphatic drainage - Various other medical conditions may also warrant this procedure to restore normal lymphatic function.

2. Procedure

The cannulation of the thoracic duct involves several critical procedural steps, which are outlined as follows:

  • Step 1: Preparation and Anesthesia - The patient is positioned appropriately, and local anesthesia is administered to ensure comfort during the procedure. Sterile techniques are employed to minimize the risk of infection.
  • Step 2: Incision - A surgical incision is made above the clavicle to provide access to the thoracic duct. The incision is carefully placed to allow for optimal exposure while minimizing trauma to surrounding tissues.
  • Step 3: Exposure of the Thoracic Duct - The surgeon dissects through the layers of tissue to expose the thoracic duct. Care is taken to identify anatomical landmarks to avoid injury to adjacent structures.
  • Step 4: Puncture and Cannulation - Once the thoracic duct is adequately exposed, it is punctured with a needle. A cannula is then inserted into the duct, allowing for the advancement of the cannula as needed to facilitate lymphatic drainage.
  • Step 5: Monitoring of Lymphatic Fluid - After successful cannulation, the flow, pressure, and composition of the lymphatic fluid are monitored. This assessment is crucial for determining the underlying cause of any obstruction and guiding further management.

3. Post-Procedure

Following the cannulation of the thoracic duct, patients are typically monitored for any immediate complications, such as bleeding or infection at the incision site. The lymphatic fluid's characteristics are observed to assess the effectiveness of the procedure. Patients may require follow-up imaging or additional interventions based on the findings from the lymphatic fluid analysis. Recovery time can vary depending on the individual patient's condition and the complexity of the procedure, but careful post-operative care is essential to ensure optimal outcomes.

Short Descr ACCESS THORACIC LYMPH DUCT
Medium Descr CANNULATION THORACIC DUCT
Long Descr Cannulation, thoracic duct
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Items and Services Packaged into APC Rates
ASC Payment Indicator Packaged service/item; no separate payment made.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE 1
CCS Clinical Classification 67 - Other therapeutic procedures, hemic and lymphatic system

This is a primary code that can be used with these additional add-on codes.

77002 CPT Add On MPFS Status: Active Code APC N ASC N1 Physician Quality Reporting CPT Assistant Article Fluoroscopic guidance for needle placement (eg, biopsy, aspiration, injection, localization device) (List separately in addition to code for primary procedure)
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
GC This service has been performed in part by a resident under the direction of a teaching physician
RT Right side (used to identify procedures performed on the right side of the body)
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
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