11.2 Internal Transport & Storage

Internal Transport & Storage

Once an HD shipment clears receiving, it still has to move — from the receiving area to HD storage, from storage to a compounding room, and sometimes from compounding to a nursing unit or infusion clinic. Each of those transitions is a transit point, and every transit point is an opportunity for a container to be dropped, punctured, or opened accidentally. USP <800> addresses this risk through two related requirements: how HDs move within a facility, and how they are stored once they arrive at their destination. Both show up on the PTCB Hazardous Drug Management exam as scenario questions built around a specific container type, a specific number of transit points, or a specific storage layout.

Principles of Internal HD Transport

The guiding idea behind internal transport is straightforward: an HD in transit should be no more likely to break, leak, or release vapor than an HD sitting still. That means:

• Sealed, puncture-resistant secondary containers. HDs — especially liquids and injectables — should travel inside containers designed to contain a break or leak, not just the primary vial or bag alone.
• Minimizing personnel and transit points. Every additional hand-off and every additional stop along the route is another chance for a container to be dropped, jostled, or mishandled. Facilities should route HD transport to touch as few people and as few intermediate stops as the workflow allows.

Pneumatic Tube Systems: Generally Avoided

Many facilities use pneumatic tube systems to move medications quickly between departments — but HDs are the exception, not the rule, for this technology. The forces involved in tube transport (rapid acceleration, impact at the receiving station) create real breakage, leak, and aerosolization risk for an HD container, which is unacceptable for a drug class where inhalation and dermal exposure are the primary safety concerns.

As a result, facilities generally avoid pneumatic tubes for HD transport. Where a facility does use pneumatic tubes for HDs at all, it requires:

• Specific validation of the tube system for HD transport, rather than a general assumption that the system already works acceptably for other medications
• Sealed, HD-rated carriers designed to contain a break or leak inside the tube
• A facility SOP documenting exactly which HDs, if any, are approved for tube transport and under what container requirements

Exam Tip: If a scenario asks whether a chemotherapy vial should go through a facility's pneumatic tube system, the safer and generally correct answer is no — hand-deliver it in a sealed, puncture-resistant secondary container instead, unless the question explicitly states the tube system has been validated for HDs and uses HD-rated carriers.

HD Storage Requirements

Storage is where HDs sit between transport events, and it carries its own containment requirements:

Note the ACPH figure carefully: 12 ACPH applies to nonsterile HD storage and compounding areas (C-SCA). It is not the figure for sterile HD compounding buffer rooms, which require a higher air-exchange rate of 30 ACPH, because those rooms carry the added burden of maintaining ISO Class 7 sterility alongside containment. Since storage is never itself a compounding activity, HD storage areas correctly use the 12 ACPH nonsterile figure — do not treat 12 ACPH as a universal HD number that also covers sterile compounding spaces.

Exam Scenario

A pharmacy is evaluating whether to route chemotherapy vials from the receiving area to the infusion clinic through its existing pneumatic tube system, which is already used for non-hazardous medications. The correct call, absent specific validation of the tube system for HD use and HD-rated sealed carriers, is to avoid the pneumatic tube and instead hand-transport the vials in a sealed, puncture-resistant secondary container, using the fewest personnel and stops the workflow allows. Once the vials reach the clinic, they should be held in a dedicated, negative-pressure HD storage area — separate from the clinic's general medication stock — until administration, with signage identifying the area as HD storage.

Key Takeaways for the Exam

• HDs travel within a facility in sealed, puncture-resistant secondary containers — especially liquids and injectables — routed to minimize the number of personnel and transit points involved.
• Pneumatic tube systems are generally avoided for HD transport due to breakage, leak, and aerosolization risk; where used at all, they require specific validation and sealed HD-rated carriers per facility SOP.
• HD storage must be physically separate from non-HD inventory, typically in a negative-pressure area with at least 12 ACPH (the nonsterile HD figure — sterile compounding buffer rooms require 30 ACPH instead).
• Antineoplastic HDs are often further segregated from other HD categories within storage, per facility policy.
• HD storage areas require clear signage/labeling so personnel recognize the special handling requirement at a glance.