- Kit for the preparation of Lymphoseek contains five Tilmanocept Powder vials, each containing 250 mcg of tilmanocept from which 50 mcg is intended for administration to a patient.
- oThe Kit for the preparation of Lymphoseek is packaged either with or without five DILUENT for Lymphoseek vials each containing 4.5 mL of sterile buffered saline with phenol.
- oThe Kit for the preparation of Lymphoseek may also be diluted with pharmacy-available sterile 0.9% sodium chloride injection.
- oA diluent is used to dilute Lymphoseek after the radiolabeling procedure. The amount of diluent used varies, depending on the total injection volume and the number of syringes used for each patient.
- The vial components of the Kit for the preparation of Lymphoseek are intended solely for use in the preparation of Lymphoseek. Do not administer the unprepared vial components of the Kit directly to a patient.
- Follow aseptic procedures during preparation and administration.
Drug Preparation Instructions
Prior to preparation of Lymphoseek, determine the planned injection technique and the number of injections that will be used for a given patient. For each injection prepare a separate syringe. Based on the planned number of injection syringes and the planned total injection volume per patient, determine (from Table 1 below) the Reconstituted Vial Volume of radiolabeled Lymphoseek.
Table 1. Preparation of Lymphoseek for AdministrationPlanned Number of Injections for a Patient | Total Injection Volume Per Patient | Reconstituted Vial Volume of Radiolabeled Lymphoseek |
1 syringe x 0.1 mL | 0.1 mL | 0.5 mL |
5 syringes x 0.1 mL or 2 syringes x 0.25 mL or 1 syringe x 0.5 mL | 0.5 mL | 2.5 mL |
5 syringes x 0.2 mL or 4 syringes x 0.25 mL or 2 syringes x 0.5 mL | 1 mL | 5 mL |
Once the Reconstituted Vial Volume is established, use the following steps to prepare radiolabeled Lymphoseek:
Radiolabeling
a. Inspect the Tilmanocept Powder vial for any damage. Do not use if vial integrity appears compromised. Do not vent the Tilmanocept Powder vial prior to or during radiolabeling.
b. Use Technetium Tc 99m pertechnetate, sodium injection solution from a technetium Tc 99m generator within 8 hours of its elution.
c. Using a sterile syringe, aseptically draw approximately 92.5 MBq (2.5 mCi) of Technetium Tc 99m pertechnetate sodium injection solution in either about 0.35 mL volume (for 0.5 mL Reconstituted Vial Volume) or about 0.7 mL volume (for 2.5 mL or 5 mL Reconstituted Vial Volume). Assay the syringe for technetium Tc 99m activity in a dose calibrator.
d. Write the radioactivity amount, the Reconstituted Vial Volume, date and time, expiration time and lot number in the space provided on the radioactive product vial label and affix it to the Tilmanocept Powder vial. Place the vial in a radiation shield and sanitize the septum with alcohol wipe.
e. Aseptically add Technetium Tc 99m pertechnetate, sodium injection solution to the Tilmanocept Powder vial. Without withdrawing the needle, remove an equal volume of headspace gas. Do not vent.
f. Remove the needle, gently shake the vial to mix the contents, and then let it stand at room temperature for at least 15 minutes.
Reconstitution
g. Aseptically add the supplied DILUENT for Lymphoseek or pharmacy-available sterile 0.9% sodium chloride injection to the radiolabeled product in the Tilmanocept Powder vial to bring the volume to the Reconstituted Vial Volume of 0.5 mL, 2.5 mL, or 5 mL prior to filling the patient dose in syringe(s). To normalize pressure, withdraw an equal volume of headspace gas.
h. Each Lymphoseek vial, once radiolabeled and reconstituted, would contain sufficient amount to provide doses for up to four patients when prepared according to the instructions.
Quality Control of Radiolabeled Solution
i. Assay the reconstituted vial for total radioactivity using a dose calibrator. Write the technetium Tc 99m activity concentration, total volume, assay time and date, expiration time, and lot number on the shield label supplied with the Kit. Affix the label to the shield.
j. Determine the radiochemical purity of the radiolabeled product [see Dosage and Administration (2.4)]. Do not use if the radiochemical purity is less than 90%.
k. Withdraw the required volume of the radiolabeled product into the required number of syringes. Assay the syringe(s) in a dose calibrator. Write the radioactivity amount, date and time of assay, volume, and expiration time (this is not to exceed 6 hours from preparation time) on the supplied syringe label and affix it to the syringe(s).
Duration of Use and Storage of Radiolabeled Solution
l. Store the radiolabeled Lymphoseek in radiation shielding at room temperature.
m. Use the radiolabeled Lymphoseek within 6 hours of preparation. Discard the unused radiolabeled Lymphoseek.